Doubling its Production in One Year: Reviving a Brown Field in South of Oman

2021 ◽  
Author(s):  
Suria Amalia Suut ◽  
Mahmood Khamis Al Kalbani ◽  
Issa Quseimi ◽  
Abdullah Gahaffi ◽  
Arjen Wielaard ◽  
...  
Keyword(s):  
Data Analysis ◽  
Water Injection ◽  
Data Gathering ◽  
Water Flooding ◽  
Success Story ◽  
Full Field ◽  
One Year ◽  
Clastic Reservoirs ◽  
Low Rate

Abstract This paper summarises a ONE development success story of reviving a mature brownfield in South of Oman, Field β, just within ONE year through collaboration between different disciplines, comprehensive data analysis, optimising and recompletion of existing wells. Field β, comprised of multi-stacked clastic reservoirs, was put on stream in 1980s and peaked in early 1990s. Pilot water injection started in 1993 and full field water flooding continued in 1997. After more than 35 years since start of production, one can say the field was already in the tail end of its life. It had been stabilizing at low rate after 25 years and starting to decline further and at some point was one of the potential candidates to be decommissioned. A new FDP (FDP18) for part of the field was delivered in 2018 with the first well drilled at the end of that year. In 2019, despite drilling further wells on the FDP18, production was declining and was at 2018 rate towards the year end. Intensive data analysis and integrated reservoir reviews per reservoir layers were actively performed and new opportunities and data gathering were identified. FDP18 wells from 2019 onwards were then deepened to also acquire log data over deeper than the target reservoirs. Further synergy between asset and exploration teams also instigated in new discoveries including oil in shallower carbonate reservoirs, which were logged and sampled when drilling the FDP18 wells. Declining production, low oil price and COVID-19 crisis that hit 2020 challenged the team to be more resilient and with ONE development mindset between development and WRFM team, also between asset and exploration team, existing long-term closed in and very low productivity wells were utilised to tap these new opportunities. As a result, the field production has been increased by more than double, highest since 10 years ago, with a potential of triple its production rate, all achieved through optimizing and recompletion of existing wells within 1 year, at a very attractive low UTC.

Integrated Production Data Analysis and Water Injection Optimization in A Giant Carbonate Field

2021 ◽  
Author(s):  
Adel Mehrabadi ◽  
Gabriele Urbani ◽  
Simona Renna ◽  
Lucia Rossi ◽  
Italo Luciani ◽  
...  
Keyword(s):  
Data Analysis ◽  
Water Injection ◽  
Water Flooding ◽  
Integrated Analysis ◽  
Production Data ◽  
Data Set ◽  
Proper Actions ◽  
Injection Scheme ◽  
Vertical Heterogeneity ◽  
Current Water

Abstract In case of giant brown fields, a proper water injection management can result in a very complex process, due to the quality and quantity of data to be analysed. Main issue is the understanding of the injected water preferential paths, especially in carbonate environment characterized by strong vertical and areal heterogeneities (karst). A structured workflow is presented to analyze and integrate a massive data set, in order to understand and optimize the water injection scheme. An extensive Production Data Analysis (PDA) has been performed, based on the integration of available geological data (including NMR and Cased Hole Logs), production (allocated rates, Well Tests, PLT), pressure (SBHP, RFT, MDT, ESP) and salinity data. The applied workflow led to build a Fluid Path Conceptual Model (FPCM), an easy but powerful tool to visualize the complex dynamic connections between injectors-producers and aquifer influence areas. Several diagnostic plots were performed to support and validate the main outcomes. On this basis, proper actions were implemented to optimize the current water injection scheme. The workflow was applied on a carbonate giant brown field characterized by three different reservoir members, hydraulically communicating at original conditions, characterized by high vertical heterogeneity and permeability contrast. Moreover, dissolution phenomena, localized in the uppermost reservoir section, led to important permeability enhancement through a wide network of connected vugs, acting as water preferential communication pathways. The geological analysis played a key role to investigate the reservoir water flooding mechanism in dynamic conditions. The water rising mechanism was identified to be driven by the high permeability contrast, hence characterized by lateral independent movements in the different reservoir members. The integrated analysis identified room for optimization of the current water injection strategy. In particular, key factor was the analysis and optimization at block scale, intended as areal and vertical sub-units, as identified by the PDA and visualized through the FPCM. Actions were suggested, including injection rates optimization and the definition of new injections points. A detailed surveillance plan was finally implemented to monitor the effects of the proposed actions on the field performances, proving the robustness of the methodology. Eni workflow for water injection analysis and optimization was previously successfully tested only in sandstone reservoirs. This paper shows the robustness of the methodology also in carbonate environment, where water encroachment is strongly driven by karst network. The result is a clear understanding of the main dynamics in the reservoir, which allows to better tune any action aimed to optimize water injection and increase the value of mature assets.

scholarly journals Redo Surgery after Failed Open VBG: Laparoscopic Minigastric Bypass versus Laparoscopic Roux en Y Gastric Bypass—Which Is Better?

2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Tamer M. S. Salama ◽  
Karim Sabry
Keyword(s):  
Bariatric Surgery ◽  
Operative Time ◽  
Simple Procedure ◽  
Revisional Bariatric Surgery ◽  
Redo Surgery ◽  
Short Operative Time ◽  
One Year ◽  
Low Rate ◽  
Long Term Studies

Background. Long-term studies have reported that the rate of conversion surgeries after open VBG ranged from 49.7 to 56%. This study is aiming to compare between LMGB and LRYGB as conversion surgeries after failed open VBG with respect to indications and operative and postoperative outcomes.Methods. Sixty patients (48 females and 12 males) presenting with failed VBG, with an average BMI of 39.7 kg/m2ranging between 26.5 kg/m2and 53 kg/m2, and a mean age of 38.7 ranging between 24 and 51 years were enrolled in this study. Operative and postoperative data was recorded up to one year after the operation.Results. MGB is a simple procedure that is associated with short operative time and low rate of complications. However, MGB may not be applicable in all cases with failed VBG and therefore RYGB may be needed in such cases.Conclusion. LMGB is a safe and feasible revisional bariatric surgery after failed VBG and can achieve early good weight loss results similar to that of LRYGP. However, the decision to convert to lap RYGB or MGB should be taken intraoperatively depending mainly on the actual intraoperative pouch length.

The Success Story of Secondary Recovery Using Peripheral Method Waterflooding in Carbonate Reservoir North East Air Serdang (NEASD) and Guruh (GRH) Field Pertamina Hulu Energi Ogan Komering

2020 ◽  
Author(s):  
J. Mulyono
Keyword(s):  
Water Injection ◽  
Tracer Tests ◽  
Carbonate Reservoir ◽  
Recovery Factor ◽  
Water Flooding ◽  
Injection System ◽  
Economic Evaluations ◽  
Success Story ◽  
North East ◽  
The Government

After completing the Geological Geophysical and Reservoir (GGR) model revision of North East Air Serdang (NEASD) and the Guruh (GRH) field, Pertamina Hulu Energi Ogan Komering (PHE OK) evaluated the water flooding performance that has been applied since 2006. This paper explains the success story of the water flooding application using the peripheral method in the carbonate reservoir NEASD and the GRH field in the Ogan Komering Block. Water flooding was successfully applied in the NEASD and Guruh fields. The carbonate reservoirs are well connected as evidenced by tracer tests conducted in 2006. The waterflood development was based on running the simulation water injection sensitivity cases, economic evaluations, and entailed converting the unproductive wells into injector wells and building an injection system surface facilities. The approved Plan of Further Development (POFD), covered field wide application of the waterflood and performance surveillance monitoring. The POFD of water flooding in NEASD and Guruh field was approved in 2006 by the government and fulfilled all of the commitments in 2018 with oil incremental production of 4.85 MMBO from a do nothing baseline recovery factor (RF) of 26.5% going up to 34.2% (post water flooding). Although this had fulfilled the programs and economic commitment, currently both of the fields still produce about 1500 bopd. After updating the Geological Geophysical and Reservoir (GGR) model in 2019, it is predicted that the total economic recovery factor (RF) of the development can reach 41,7% by the end of the PSC contract in 2038.

Coming Together Through Falling Apart

2019 ◽  
Vol 40 (2) ◽  
pp. 151-168
Author(s):  
Heather Churchill ◽  
Jeremy M. Ridenour
Keyword(s):  
Data Analysis ◽  
Qualitative Data ◽  
Structural Changes ◽  
Systematic Approach ◽  
Qualitative Approach ◽  
Psychological Assessments ◽  
Transference And Countertransference ◽  
Testing Data ◽  
Psychoanalytically Oriented Psychotherapy

Abstract. Assessing change during long-term psychotherapy can be a challenging and uncertain task. Psychological assessments can be a valuable tool and can offer a perspective from outside the therapy dyad, independent of the powerful and distorting influences of transference and countertransference. Subtle structural changes that may not yet have manifested behaviorally can also be assessed. However, it can be difficult to find a balance between a rigorous, systematic approach to data, while also allowing for the richness of the patient’s internal world to emerge. In this article, the authors discuss a primarily qualitative approach to the data and demonstrate the ways in which this kind of approach can deepen the understanding of the more subtle or complex changes a particular patient is undergoing while in treatment, as well as provide more detail about the nature of an individual’s internal world. The authors also outline several developmental frameworks that focus on the ways a patient constructs their reality and can guide the interpretation of qualitative data. The authors then analyze testing data from a patient in long-term psychoanalytically oriented psychotherapy in order to demonstrate an approach to data analysis and to show an example of how change can unfold over long-term treatments.

Becoming Rhizomatic: Researching Flowing in/between Striated and Smooth Space

2019 ◽  
Vol 13 (3) ◽  
pp. 355-376
Author(s):  
Ester A. Betrián Villas ◽  
Gloria Jové Monclus ◽  
Charly Ryan
Keyword(s):  
Data Analysis ◽  
Educational Change ◽  
Research Methodology ◽  
Deleuze And Guattari ◽  
Smooth Space

Exploring long-term educational change, we investigate our re/construction of research methodology as we moved from a positivist framework to working with ideas drawn from Deleuze and Guattari. We reveal our becoming rhizomatic in data analysis in the metamodelling of the richness flowing horizontally through our practices. We tell of our struggles to escape hierarchical thinking and relations researching between the smooth and striated. A space of interactions, conversations and writings created relations between polyphonic voices, leading us to an emergent methodology. Our struggle against hierarchies in data analysis yielded rich educational possibilities for becoming that Deleuzo-Guattarian thinking offers us.

scholarly journals A206 EVOLUTION OF PEDIATRIC AUTOIMMUNE CHOLANGITIS AND PRIMARY SCLEROSING CHOLANGITIS INTO ADULTHOOD

2021 ◽  
Vol 4 (Supplement_1) ◽  
pp. 234-236
Author(s):  
P Willems ◽  
J Hercun ◽  
C Vincent ◽  
F Alvarez
Keyword(s):  
Primary Sclerosing Cholangitis ◽  
Sclerosing Cholangitis ◽  
Response To Treatment ◽  
Similar Proportion ◽  
Autoimmune Cholangitis ◽  
Significant Difference ◽  
One Year ◽  
Liver Tests

Abstract Background The natural history of primary sclerosing cholangitis (PSC) in children seems to differ from PSC in adults. However, studies on this matter have been limited by short follow-up periods and inconsistent classification of patients with autoimmune cholangitis (AIC) (or overlap syndrome). Consequently, it remains unclear if long-term outcomes are affected by the clinical phenotype. Aims The aims of this is study are to describe the long-term evolution of PSC and AIC in a pediatric cohort with extension of follow-up into adulthood and to evaluate the influence of phenotype on clinical outcomes. Methods This is a retrospective study of patients with AIC or PSC followed at CHU-Sainte-Justine, a pediatric referral center in Montreal. All charts between January 1998 and December 2019 were reviewed. Patients were classified as either AIC (duct disease on cholangiography with histological features of autoimmune hepatitis) or PSC (large or small duct disease on cholangiography and/or histology). Extension of follow-up after the age of 18 was done for patients followed at the Centre hospitalier de l’Université de Montréal. Clinical features at diagnosis, response to treatment at one year and liver-related outcomes were compared. Results 40 patients (27 PSC and 13 AIC) were followed for a median time of 71 months (range 2 to 347), with 52.5% followed into adulthood. 70% (28/40) had associated inflammatory bowel disease (IBD) (78% PSC vs 54% AIC; p=0.15). A similar proportion of patients had biopsy-proven significant fibrosis at diagnosis (45% PSC vs 67% AIC; p=0.23). Baseline liver tests were similar in both groups. At diagnosis, all patients were treated with ursodeoxycholic acid. Significantly more patients with AIC (77% AIC vs 30 % PSC; p=0.005) were initially treated with immunosuppressive drugs, without a significant difference in the use of Anti-TNF agents (0% AIC vs 15% PSC; p= 0.12). At one year, 55% (15/27) of patients in the PSC group had normal liver tests versus only 15% (2/13) in the AIC group (p=0.02). During follow-up, more liver-related events (cholangitis, liver transplant and cirrhosis) were reported in the AIC group (HR=3.7 (95% CI: 1.4–10), p=0.01). Abnormal liver tests at one year were a strong predictor of liver-related events during follow-up (HR=8.9(95% CI: 1.2–67.4), p=0.03), while having IBD was not (HR=0.48 (95% CI: 0.15–1.5), p=0.22). 5 patients required liver transplantation with no difference between both groups (8% CAI vs 15% CSP; p=0.53). Conclusions Pediatric patients with AIC and PSC show, at onset, similar stage of liver disease with comparable clinical and biochemical characteristics. However, patients with AIC receive more often immunosuppressive therapy and treatment response is less frequent. AIC is associated with more liver-related events and abnormal liver tests at one year are predictor of bad outcomes. Funding Agencies None

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