Gotowa bibliografia na temat „M-BPDM”

The structure of M 2(OH)2(bpdc) (bpdc = biphenyl dicarboxylate, C14H8O4) is distinct from that of the isoreticular compounds M 2(OH)2(bdc) (bdc = benzene dicarboxylate, C8H4O4) (M = Mn, Fe), in the sense that no disorder of the bpdc molecules from one layer to the other needs to be considered. The global symmetry is lower in the bpdc compounds (P 1) than in the bdc compounds (C2/m). Both Mn2(OH)2(bpdc) and Fe2(OH)2(bpdc) order magnetically at 36.8 and 46.5 K, respectively, and can be considered as uncompensated antiferromagnets, whereas Mn2(OH)2(bdc) (Néel temperature T N = 38.5 K) and Fe2(OH)2(bdc) (T N = 66 K) are compensated antiferromagnets.

Two novel photochromic complexes [Zn₂(bpdc)₂(m-DPNDI)₂]·H₂O (1) and [Cd(bpdc)(m-DPNDI)]·H₂O (2) (H₂bpdc = 4,4′-diphenic acid, m-DPNDI = N,N′-bis(3-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide) were prepared through a solvothermal method.

To study the law of gas transportation in mining areas, Fluent numerical simulation software was applied to examine the influence of different pseudo-slope lengths (PSL) on gas concentration in a U-ventilated working area under no-extraction conditions. Based on this, numerical simulation experiments were conducted on the buried pipe extraction arrangement parameters. The simulation found that when there was no extraction, the PSL had an impact on the airflow in the extraction area, which caused the airflow in the extraction area to be disordered, causing gas to accumulate locally at the working area. When the buried pipe depths (BPDs) and PSLs of the working area worked together, the gas concentration of the working area was lower when the inlet air influence zone and the extraction influence zone were through; otherwise, gas concentration accumulation occurred at the working area. The research results showed that when the PSL was at 25 m and BPD was at 20 m, the gas concentration at the working area was not abnormal, and the gas concentration in the upper corner was lower. By adjusting the PSL and BPD of the test working area, the maximum gas concentration in the upper corner was reduced to 0.46% and the maximum gas concentration in the return air outlet was reduced to 0.41%. The experimental and practical results provide important reference values for coal and gas co-mining.

The mixing of one mole of 2,2'-bipyridine-3,3'-dicarboxylic acid (bpdc) with two mole of potassium hydroxide (KOH) in methanol were refluxed for (half hour), followed by addition of one mole methanol solution of MCl2.nH2O (where M=Co, Ni or Cu). The mixture was refluxed for (2 hours) to give colored complexes of the metal ions of [M(bpdc)(H2O)4]. The [M(bpdc)(H2O)4] were reacted with one mole of 2-Mercapto-5-phenyl-1,3,4-oxadiazole (phozSH) producing the colored mixed ligand complexes with general formula [M(bpdc)(phozSH)(H2O)3] in which the metal ions coordinated to the ligand through O-atoms of carboxyl group in (bpdc) and N-atom of (phozSH) ligand. The ligands and complexes are well identified by using Furrier transform infrared spectroscopy, 1H-NMR, 13C-NMR, Electronic spectroscopy, CHNS analysis, Melting point, conductivity measurement. The Antioxidant activity were screened for all the complexes by the use of 2, 2-diphenyl-1-picrylhydrazyl (DPPH) method.

This study examines psychopathology and clinical characteristics of patients with borderline personality disorder (BPD) and comorbid narcissistic personality disorder (NPD) from two international randomized controlled trials. From a combined sample of 188 patients with BPD, 25 also fulfilled criteria for a comorbid diagnosis of NPD according to DSM-IV. The BPD patients with comorbid NPD, compared to the BPD patients without comorbid NPD, showed significantly more BPD criteria (M = 7.44 vs. M = 6.55, p < .001), fulfilled more criteria of comorbid histrionic (M = 3.84 vs. M = 1.98, p < .001), paranoid (M = 3.12 vs. M = 2.27, p = .014), and schizotypal (M = 1.64 vs. M = 1.02, p = .018) personality disorders, and were more likely to meet criteria for full histrionic PD diagnosis (44.0% vs. 14.2%, p < .001). The BPD-NPD group also reported significantly fewer psychiatric hospitalizations in the previous year (M = 0.40 vs. M = 0.82, p = .019) and fewer axis I disorders (M = 2.68 vs. M = 3.75, p = .033). No differences could be found in general functioning, self-harming behavior, and suicide attempts.

A multiplex amplification and detection platform for the diagnosis of Mycobacterium bovis and Brucella abortusinfection simultaneously in bovine milk and nasal secretions was developed. This system (designated the bovine pathogen detection assay [BPDA]-PCR) consists of duplex amplification of species-specific targets (a region of the BCSP31K gene of B. abortus and a repeat-sequence region in the hsp65 gene of M. bovis, respectively). This is followed by a solid-phase probe capture hybridization of amplicons for detection. On the basis of spiking experiments with normal milk, the analytical sensitivity of the assay was 800 CFU equivalents/ml of milk for B. abortus and as low as 4 CFU equivalents per ml of milk for M. bovis. BPDA-PCR was validated with 45 liver samples from lemmings experimentally infected with B. abortus. The assay sensitivity, based on culture status as a “gold standard,” was 93.9%. In this experiment, BPDA-PCR also identified five culture-negative liver samples as positive (41.7%). Field studies for the evaluation of BPDA-PCR were performed with samples from dairy animals from geographically distinct regions (India, Mexico, and Argentina). A high prevalence of shedding of B. abortus(samples from India) and M. bovis (samples from Mexico) was identified by BPDA-PCR. In samples from India, B. abortusshedding was identified in 86% of milk ring test-positive animals (n = 15) and 80% of milk ring test-negative cows (n = 5). In samples from Mexico, M. bovis was identified by PCR in 32.6% of pools (n = 46) of milk that each contained milk from 10 animals and in 56.2% of nasal swabs (n = 121) from cattle from tuberculin test-positive herds. In contrast, the Argentine cattle (n = 70) had a modest prevalence of M. bovis shedding in nasal swabs (2.9%) and milk (1.4%) and ofB. abortus in milk (11.4%). On the basis of these analyses, we identify BPDA-PCR as an optimal tool for both screening of herds and testing of individual animals in a disease eradication program. A combination of the duplex assay, screening of milk samples in pools, and the proposed algorithm provides a highly sensitive, cost-effective, and economically viable alternative to serological testing.

Borderline Personality Disorder (BPD) is on focus due to its intense and long-lasting symptoms. BPD is considered a psychological disorder of young adults, as its major symptoms start revealing at the beginning of young adulthood in the early 20s. The aim of this study was to assess BPD and its symptoms in the young population of students achieving higher education in private universities of Lahore, Pakistan. A stratified sample of 700 university going students was collected from three high ranked private universities of Lahore. The sample was collected and assessed through Borderline Personality Inventory (BPI-cut 20). The results obtained through the descriptive statistics revealed the high percentage of BPD in young adults (62%). Further, a high percentage of BPD was observed in a group of students ages 18- 21 years (63%). The four factors of BPD: Primitive Defense Mechanism, Identity Diffusion, Fear of Closeness, Self-Mutilation, and Impulsivity were equally found among the male and female samples. The independent sample t-test revealed the significant results obtained from the factor self-mutilation (Male: M=.21, SD=.405 and Female: M= .14, SD= .346, t=2.350, p=0.019) and impulsivity (Male; M=.35, SD=.479 and Female: M= .403, SD= .021, t= 4.482, p= 0.000). The results of this study concluded BPD and its factors were frequently being found in young adults studying in universities. Further, no significant gender differences were observed other than in two factors self-mutilation and impulsivity. It is recommended that there is an essential need to promote the health and wellbeing of the young population of students especially studying in universities because the evidence suggests that they are at risk. They further need assessment and intervention.

Lazzaretti M, Morandotti N, Sala M, Isola M, Frangou S, De Vidovich G, Marraffini E, Gambini F, Barale F, Zappoli F, Caverzasi E, Brambilla P. Impaired working memory and normal sustained attention in borderline personality disorder.Objective: Although reports in the literature describe deficits in working memory in borderline personality disorder (BPD), the evidence is limited and inconsistent. The aim of this study was to evaluate further this cognitive dimension and its clinical correlates in BPD.Method: We compared the performance of 15 BPD patients to 1:1 matched healthy controls on verbal working memory as determined by the sequential letter N-back test and sustained attention as measured using the continuous performance test (CPT).Results: BPD patients performed significantly worse on the N-back test compared to healthy controls (p < 0.05), but not on the CPT. The N-back deficit was more pronounced and significant in the 3-back condition and inversely correlated with impulsivity.Conclusions: These results suggest the presence of working memory deficits in BPD that may be linked to greater impulsivity and sustained by impairment in the dorsolateral prefrontal cortex.

Polyimide/polyimide molecular composite (MC) films were prepared by blending precursor solutions of a rigid polyimide and a reactive oligoimide or a reactive polyimide that contains acetylene units in the backbone in a 7:3 ratio, followed by casting, drying and thermal imidization at 300 °C. 3, 3′, 4, 4′-Biphenyltetracarboxylic dianhydride (BPDA), pyromellitic dianhydride (PMDA), p-phenylenediamine (PDA), oxydianiline (ODA) and 3, 3′-diaminodiphenylacetylene ( m-intA) were used as acid dianhydride and diamine monomers for the preparation of polyimide. The rigid components were prepared from PMDA or BPDA and PDA. The matrix components were prepared from PMDA or BPDA and ODA or m-intA. The polyimide/polyimide MCs have exotherm on DSC due to the reaction of internal acetylene units, which indicates that the MC films are laminate processable. Tensile measurements revealed that the tensile modulus of the MCs utilizing reactive oligoimides is 20–30% higher than that of the MCs utilizing reactive polyimides. Viscoelastic analyses of the MC films showed that the crosslinking of the acetylene units gave polyimides that have a very high glass transition temperature.

A new Ni metal organic framework based on 2,2′-Biphenyldicarboxylic, 4,4′- bipyridine as linker is prepared by hydrothermal reaction and directly used as an electrode material for supercapacitor and the detection of sarcosine. [Ni3(BIPY)3(BPDA)2(HCOO)2(H2O)2]n (Ni-1; BIPY = 4,4′-bipyridine; BPDA = 2,2′-Biphenyldicarboxylate) displays the specific capacitance of the Ni-1 are 667 F/gat 1 A/g and retention is 82% of initial capacitance at 1 A/g. The excellent electrochemical property is ascribed to the intrinsic nature of Ni-1. Furthermore, the sarcosine sensing performance of the Ni-1 electrode is evaluated in 0.1 M of NaOH solution and the electrode showed a wider range of linear response 1 × 10−4 M to 1 × 10−3 M. Thus, the results show that the Ni-1 is a potential candidate for not only sensing of sarcosine but also supercapacitor application.

La Dialectical Behavior Therapy (DBT) è un programma di trattamento cognitivo-comportamentale strutturato, complesso e ricco, messo a punto per pazienti con Disturbo Borderline di Personalità (BPD) e gravi comportamenti disfunzionali (tentativi suicidari, autolesività, instabilità relazionale, comportamenti impulsivi). DBT ha dimostrato la sua efficacia in numerosi studi: i tentativi suicidari e i comportamenti disfunzionali si sono ridotti, mentre la regolazione emotiva e il funzionamento generale dei pazienti sono migliorati. La ricerca presentata i prefigge di valutare l’efficacia e i meccanismi d’azione di DBT, esaminando sia la dimensione di outcome, sia la dimensione di processo. La prima parte dell’elaborato è dedicata alla presentazione del modello DBT. Se ne discutono i fondamenti teorici, gli accordi alla base del trattamento, le modalità del programma terapeutico e le strategie di intervento. La seconda parte dell’elaborato è una valutazione dell’efficacia di DBT, rispetto alle variabili target. Lo studio è di tipo longitudinale ed è stato condotto seguendo le linee guida internazionali. DBT è stata messa a confronto con un programma di trattamento comparabile per tipologia di pazienti, obiettivi e complessità. Il campione è composto da 95 pazienti ambulatoriali, valutati ogni tre mesi. Poiché ci si attendeva che il contributo della variabilità individuale fosse rilevante, sono stati utilizzati modelli lineari gerarchici con effetti casuali. I risultati hanno mostrato che i tentativi suicidari, i comportamenti autolesivi, la disregolazione emotiva e comportamentale sono diminuiti in entrambi i gruppi dopo un anno; i modelli hanno mostrato come i soggetti differissero nella quota di cambiamento. Inoltre, i risultati sul campione dei completer hanno suggerito che il setting di gruppo e l’intensità del trattamento potrebbero agire quali specifici meccanismi terapeutici. La terza parte dell’elaborato si compone di una serie di studi di processo con un disegno single case, inseriti nel filone della ricerca process-outcome: si tratta della valutazione di due coppie terapeutiche, una con esito favorevole ed una con esito parziale. Le pazienti erano due giovani donne con diagnosi di BPD, differenti per profilo di personalità e comportamenti disfunzionali; hanno seguito un programma DBT standard con il medesimo terapeuta, un clinico esperto. Sono state esaminate le sedute durante il primo anno di trattamento. Si sono considerate tanto la dimensione tecnica quanto quella relazionale del processo terapeutico, esaminando entrambe da una prospettiva macroanalitica e microanalitica. I risultati hanno mostrato come alcuni aspetti siano riscontrabili in ambedue le coppie terapeutiche: l’aderenza al modello di trattamento e l’atteggiamento del terapeuta orientato alla collaborazione. D’altra parte, sono emerse specificità relative alle coppie terapeutiche. Nel trattamento della paziente con esito positivo, è presente un clima relazionale globalmente positivo, terapeuta e paziente riescono ad affrontare in modo proficuo anche le incomprensioni. Invece, nel trattamento della paziente con esito parziale, terapeuta e paziente faticano a trovare una sintonizzazione e a lavorare in modo sinergico, rimanendo bloccati in dinamiche problematiche e senza riuscire a conseguire pienamente gli obiettivi prefissati. Nel loro insieme, i risultati hanno confermato l’efficacia e la complessità di DBT. Più precisamente, hanno messo in luce le sovrapposizioni e le differenze tra DBT e altri modelli teorici, in particolare con gli interventi che promuovono il funzionamento riflessivo. Inoltre, i risultati hanno confermato l’importanza di una relazione collaborativa tra terapeuta e paziente. In sintesi, è possibile concludere che i meccanismi dell’azione terapeutica in DBT possono essere compresi solo alla luce delle dinamiche del processo terapeutico entro cui si verificano.
Dialectical Behavior Therapy (DBT; Linehan, 1993, 2014) is a structured, complex and comprehensive cognitive-behavioral treatment program for patients with Borderline Personality Disorder (BPD) and severe dysfunctional behaviors (repeated suicidal attempts, self-harm behaviors, relational instability, other impulsive behaviors). Up to now, DBT proved its effectiveness in several studies: suicide attempts and dysfunctional behaviors decreased, while emotional regulation and general functioning improved. The present research aimed at assessing the effectiveness of DBT and its mechanisms of action, evaluating both outcome and process dimensions. The first part of the thesis is dedicated to the presentation of the DBT model, examining its theoretical foundations, the agreements underlying the treatment, the modalities of therapeutic program, and the strategies of intervention. The second part of the thesis is an evaluation of the effectiveness of DBT, examining the course over time of the target variables. The study is longitudinal, single-blind, with a two-arm parallel design, conducted following the international guidelines for the outcome studies on intention-to-treat samples. DBT was compared with another treatment program comparable by patient type, objectives, and complexity of interventions. The sample was comprised by 95 outpatients, assigned to groups with the minimisation procedure and assessed every three months. Since the individual variability was expected to be consistent, Hierarchical Linear Models with random effects were used. Results showed that suicidality, self-harm, emotional and behavioral dysregulation decreased in both groups after one year; unconditional growth models indicated that subjects differed in the elevation and in the rate of change. Moreover, results on the completers’ subsample suggested that the group setting and the intensity of treatment could represent specific therapeutic mechanisms. The third part of the thesis is composed by process studies with a single-case design, in the strand of the process-outcome research: the empirical evaluation of two therapeutic couples, one with a favorable outcome and one with a partial outcome, was conducted. The patients were two young women with a diagnosis of Borderline Personality Disorder, different for personality profile and dysfunctional behaviors at the beginning of treatment; they followed a DBT standard program with the same therapist, a male experienced clinician. Sessions over the first year of treatment were examined (N1 = 38; N2 = 37). The technical and the relational dimensions of the therapeutic process were assessed and examined through a macroanalytic and microanalytic perspective. Results showed that some aspects are present in both couples: namely, the adherence to the treatment model and the attitude of the therapist oriented towards collaboration. On the other hand, specificities relating to each therapeutic couple emerged. In the treatment of the patient with positive outcomes, there was a globally positive relational climate; furthermore, therapist and patient can deal even with episodes of misunderstanding. Instead, in the treatment of the patient with partial outcomes, therapist and patient struggled to find an attunement and to work in synergy, remaining trapped in problematic relational patterns and without fully achieving the therapeutic objectives previously agreed. Taken together, results confirmed the effectiveness and the complexity of DBT. More specifically, they shed light on overlaps and differences between DBT and other theoretical models, in particular interventions promoting reflective functioning. Furthermore, the importance of a collaborative relationship between therapist and patient was confirmed. Overall, results suggested that mechanisms of action in DBT can be understood only in light of the dynamics of the therapeutic process in which they occur.

This thesis begins with presenting a thorough review of m-BPDM analogues and their metal complexes. The literature review led us to the foundation of research gap. The studies were then diverted towards finding out the factors that could enhance the stability of the free base analogues of m-BPDM systems. Hence, in the next two chapters (4 and 5) the effect of substitutions at meso and C3-positions, studied computationally, has been presented. Molecular tailoring approach has been incorporated in order to find out the intramolecular hydrogen bond energies. The energies so obtained have been correlated with other factors obtained from the optimized geometry’s results, like the study of non-covalent interactions (NCI), frontier molecular orbital (FMO) visualization, molecular electrostatic surface potential (MESP) etc. We then moved to the synthesis of a new sterically hindered analogue of m-BPDM and its zinc and cadmium chloride complexes, viz. Chapter 6 of this thesis. The synthesis was confirmed by UV-Vis, 1H-NMR and mass spectrometry. The X-ray solid state structures stated the presence of two conformers of m-BPDM viz. syn and anti. It was found that crystal structures constituted varied conformers depending upon the group present at sp 3 meso carbon atoms. Thus, through chapter 7, we intend to understand the effect of substitution at meso-carbon atoms on the metalated (Zn(II) and Cd(II)) m-BPDM conformer stability.

Abstract An offshore operator in Vietnam faced high water production in a sub-hydrostatic and highly aromatic gas well. In addition to low productivity, the high water cut also strained the water treatment facility. Previous treatment attempts to shut off the high water-producing zones have been unsuccessful due to challenging well conditions. [EB1]With the treatment facility reaching maximum capacity, and expansion of the water treatment capacity being a time-consuming and costly option, a subsurface well intervention was chosen as the most effective way to reduce water production from the well. The well had complex reservoir characteristics due to highly depleted zones that made treatment placement even more complicated, increasing the risk for the operation. The well produces aromatics, and using packers for isolation reduces the packer element sealing performance. Due to the high deviation angle, a Thixotropic Organically Crosslinked Polymer (TOCP) was designed and pumped for the high water-producing zones. A customized solution using a TOCP with extensive laboratory testing was found to be the most suitable treatment design for this well. The new placement technique provided prevention of losses to the depleted zones. The thixotropic treatment provided higher viscosity when pumping stopped, allowing the polymer to seal off at the target zone. As a result of the treatment, the well responded positively. The operator significantly reduced produced water from 5,000 BPD to 2,000 BPD, accommodating the capacity of the water treatment facility. Meanwhile, gas production also increased from 4.6 M SCFD to 6.1 M SCFD, reducing the possibility of the well getting loaded up during platform shutdown. The careful engineering design and laboratory testing played a significant part in the successful campaign, with collaboration from the operator and service company leading this campaign to be a successful project. This approach and solution can help enhance production performance and reduce the cost associated with water production.

Abstract Accurate calculation of pressure and temperature profiles is crucial for correctly predicting production rates and wax deposition and hydrate plugging tendencies of subsea wells and flowlines. In the present work, the commonly used empirical pressure drop correlations coupled with heat transfer models, both in the wellbore and the subsea flowlines, are evaluated against measured steady-state data from field operations. The reference data are from Campos Basin ultra-deep waters high flowrate subsea wells (from 1,000 to 1,850 m water depth, 3,280 to 6,070 ft), covering flow rates from 1,000 to 3,150 m3/d (6,280 to 20,000 bpd) through 4 1/2 to 5 1/2 in nominal diameter tubings and up to 11 km (6.8 mi) long, 6 in ID insulated flexible flowlines. Descriptions of the evaluated models, production system geometry, and fluid properties are included in the paper.

On November 1, 1998 the Petropower Energia Limitada Project, located adjacent to Petrox’s 84,000 barrel per day (bpd) refinery in Talcahuano, Chile, entered into Commercial Operations. In addition to being the first public/private industrial partnership in Chile, it also was the first to combine petroleum coking technology with cogeneration technology in a single project financing. The project consists of a Delayed Coker Facility, which includes a 12,000 bpd Delayed Coker Unit and a 7,000 bpd Hydrotreating Unit, and a 74 MW (nominal, gross) Cogeneration Facility. The coke produced fuels a Foster Wheeler Circulating Fluidized Bed Boiler (CFB), and the energy produced provides electric power for the Petrox Refinery, the Delayed Coker Facility, and third parties, and high pressure steam for the refinery. The Cogeneration Facility, which consumes 24.8 Tonnes Per Hour of green coke, produces high-pressure steam, demineralized water and electricity for export to the refinery. The cogeneration unit also exports electricity, boiler feedwater and plant air to the Delayed Coker Facility. This leaves approximately 42 MW which is being exported to local third parties and the national grid. Environmentally, the overall project has resulted in a decrease in sulfur dioxide and particulate emissions from the refinery because of emission controls in the CFB, and elimination of burning fuel oil in the old utility system. Overall, the Delayed Coker Facility has permitted Petrox to refine heavier, less costly crudes, and the Hydrotreater Unit produces cleaner gasoline and diesel products. Petrox obtained these benefits without the expenditure of capital on the project, other than a small equity investment. The Cogeneration Facility has, and will continue to provide a long term, environmentally friendly solution to disposal of the high sulfur content coke produced by the coker, and maximizes its value as a high BTU (kilojoule - kJ) fuel for the Cogeneration Facility. The Cogeneration Facility has supplied all the refinery’s utility needs reliably and consistent with its expansion plans. After briefly describing the overall project, this paper places emphasis on the cogeneration plant with a focus on the operational experiences, including fouling, and the reliability improvements undertaken during the plant’s last three years of commercial operation. In addition, O&M costs and an overview of project economics are discussed.

Abstract A new subsea-to-shore oil field architecture is presented where produced water is separated, treated and re-injected locally. This solution reduces the overall power consumption and the global CO2e footprint of the development compared to an architecture where the whole production is sent to shore. The paper will present the results of a study for the development of a 200 000 bpd oil field requiring 300 000 bpd water injection located 150 km from shore in 1500 m water depth and with a field life of 15 years. Preliminary design work performed covers flow assurance, subsea process, subsea equipment, subsea layout as well as CO2e footprint comparison with a scenario where all the production is sent to shore. The system incorporates a gravity-based liquid-liquid separator for bulk oil-water separation, produced water is then treated, mixed with desulfated seawater and re-injected. Oil, gas and residual produced water are sent to shore via a single wet insulated line with continuous injection of low-dosage hydrate inhibitors. This scenario has two main advantages compared to a subsea-to-shore without subsea processing. The first is that the power required to boost production is significantly reduced. The second is that the volume of produced water to be treated onshore is also significantly reduced, which is advantageous, not only in terms of cost, but also in terms of reducing the shore operations’ footprint. Particular focus will be made on the produced water treatment design which is a two-stage design using two different technologies for increased robustness in order to reach a specification of 30 ppm oil-in-water for injection water.

Abstract An operator in Mexico was seeking a solution for improving methods for acid stimulation treatment in open-hole wells. Previous bullheading acid treatment in the same field was less efficient compared with selective treatment according to production conditions. In the shallow waters (offshore, Mexico), the acid stimulations are normally performed with bullheading technique; however, there are some cases where it is complicated to stimulate the production zone uniformly, especially in large openhole sections that presents fractures. Selective acid treatment technique is an alternative solution that represents an opportunity for the optimization of stimulations in Mexico and globally. The selected well has a 234 m open-hole section in a naturally fractured carbonate formation. Breaking usual paradigms, an unconventional treatment based on hydro-mechanical method for selective stimulation along the open hole was applied and completed with successful results. The operation was completed using coiled tubing (CT) deploying the Self-Aligning Jetting (SAJ) tool to stimulate 15 specific zones along the open hole section, each one selected for having the best petrophysical parameters. A 65% decrease in the acid treatment volume was obtained, which translates into savings in well flow back time, thus less Nitrogen to kick off the well, and removal time to the floating Storage/Production vessel (FSPV), in conclusion, oil production was incorporated more quickly after the well stimulation in comparison to the bullheading treatment. Comparing the two last open-hole stimulations in the same field, the productivity index obtained from conventional stimulation (bullheading) was in the order of 82 bpd/(kg/cm2), while selective stimulation was in the order of 160 bpd/(kg/cm), which is equivalent to an increase 95%. This paper presents the innovative technique of the stimulation with mechanical diversion using SAJ as the best option for injecting high-pressure fluids into specific targets through the open hole, and the advantages of the zones with the greatest oil production potential being stimulated, preventing the treatment from focusing only on a fractured zone or on areas with water or gas production potential.

The objective of this paper is to describe a series of laboratory work results in conjunction with successful implementation of the surfactant (micellar) continuous injection in the Muara Enim sand of the Arahan-Banjarsari Field, South Sumatra. A series of lab tests were conducted using field cores and fluids taken from the Arahan-Banjarsari (AR-BS) field. The tests included phase behavior, mixture viscosity measurement, spontaneous imbibition, and static isotherm adsorption tests. Several surfactant formulas had been tested to find the most consistent and most suitable to the reservoir conditions. The surfactant injection was started in March 2009 into three AR wells. The injection was divided into 4 stages with initial concentration of 0.45% and the final concentration of 0.1%. Total volume of micellar solution injected in 110 days was 52,365 bbls. An increase in oil production was observed not only in two AR wells but also in 8 wells in the neighboring BS field (500 meters distance) after 140 days since injection of micellar solution started with injection rates of 200-250 bpd. Two BS wells were reopened and produced 28% and 54% water cut (the water cut before the two wells were shut in was 19% and 76%). This micellar solution injection managed to decrease the decline rate of 70% to 26% per year, increase production rate from AR and BS fields from 90 bopd to a peak of 220 bopd in 5 months since injection started, and reserves enhancement of 183 M bbls (10% OOIP) during 3.5 years of continuous injection. The low cost, full scale chemical EOR leads to changes in the common understanding about micellar flooding and shows a high impact on oil recovery of 183 Mbls (AB-5c sand with OOIP of 1.8 MMSTB).

Abstract Bhagyam is an onshore field in the Barmer basin, located in the state of Rajasthan in Western India. Fatehgarh Formation is the main producing unit, comprising of multi-storied fluvial sandstones. Reservoir quality is excellent with permeability in the range of 1 to 10 Darcy and porosity in the range of 25-30%. The crude is moderately viscous (15 – 500 cP) having a large variation with depth (15 cP – 50 cP from around 270 m TVDSS to 400 m TVDSS and then rising steeply to 500 cp at the OWC of 448m TVDSS). Lab studies on Bhagyam cores show that the reservoir is primarily oil wet in nature. Bhagyam Field was developed initially with edge water injection and with subsequent infill campaigns, prior to polymer flood development plan implementation, the Field was operating with 162 wells. Simple mobility ratio and fractional flow considerations indicate that improving the mobility ratio (water flood end-point mobility ratio is 30-100) in Bhagyam would substantially improve the sweep efficiency. Early EOR screening studies recommended chemical EOR (polymer and ASP flood) as the most suitable method for maximizing oil recovery. The lab studies further demonstrated good recovery potential for Polymer flood. Bhagyam's first Polymer flood field application started with testing in one injector which was later expanded to 8 wells. Extended polymer injection in these wells continued for four years. Observing a very encouraging field response, field scale polymer expansion plan was designed which included drilling of 28 new infill wells (17 P+ 11 I) and 24 producer-to-injector conversions. Modular skid-based polymer preparation units were installed to meet the injection requirements of the expansion plan. Infill producers were brought online in 2018 as per the plan but polymer injection was delayed due to various external factors. The production rate, however, was sustained without significant decline, aided by continuous polymer injection in initial 8 injectors, continuing water flood and good reservoir management practices. First polymer injection in field scale expansion started in Oct’20 and was quickly ramped up to the planned 80000 BPD in 4 months, supported by analyses of surveillance data, indicating very encouraging initial production response. Laboratory quality check program was designed to check quality of polymer during preparation and to ensure viscosity integrity till the well head. The paper discusses modular polymer preparation unit set-up and the additional installations designed to reduce pipeline vibrations during pumping of polymers., Experience gained while bringing online the polymer injection wells and the lab quality checks employed to ensure good polymer quality during preparation and pumping have also been discussed. The paper also discusses reservoir surveillance program adopted at the start of polymer injection like spinner survey, Pressure fall-off surveys and the stimulation activities that worked in improving the injectivity of polymer injectors. The paper further outlines the observations from the production response and the surveillance data collected to ensure good polymer flow in this multi-darcy reservoir.

Abstract Uniform distribution of stimulation fluids in a naturally fractured reservoir with high permeability contrasts and a long open hole configuration (more than 800 m) requires an efficient temporary blocking of the preferential zones to allow the fluid to be diverted towards zones with less admission. While having bottomhole temperatures above 175°C means that controlling reaction rates and achieving effective etching to allow appropriate penetration into the invaded zone will be required and thus eliminate skin damage caused during drilling and completion. Therefore, accomplishing the optimal stimulation involves improving not only acid etching efficiency, natural fractures connectivity and adequate fluid penetration, but also achieving homogeneous fluid distribution throughout the interest zone to assure production enhancement. A chelating base fluid system was formulated based on reservoir evaluation through an engineering process that involved numerous laboratory tests, such as rock dissolution capability, acid etching patter analysis, acid spending time evaluation, corrosion control, and compatibility with reservoir fluids, while optimal diverting agent was carefully selected using advance CFD modeling to confirm diversion effectiveness to uniformly distribute fluids under bottomhole conditions and complex well configuration. Finally, stimulation treatment was defined considering fluid invasion, skin removal and productivity analysis. This paper discusses laboratory tests and modeling results as a coupled engineering process to improve acid coverage during an actual implementation in a HPHT well. Laboratory results confirmed that the smart fluid system can create long conductive channels increasing conductivity by dissolving rock formation and prevent by-products precipitation. On the other hand, CFD results demonstrated that the application of multi-stage chemical diversion pills at specific conditions (flow rate, volume, rheology) optimizes fluid distribution. Oil production increased from 3,973 to 4,375 BPD and gas production from 10.0 to 13.4 MMSCFD (½"choke) after executing the stimulation job. Wellhead pressure registered before was 3,845 psi, and after the job increased up to 5,276 psi. Successful stimulation was confirmed with bottomhole conditions which showed an increase of 2,045 psi and 5°C, logged through a bottomhole sensor while the productivity analysis allowed to support skin damage reduction from S=76 to S=0.