Huge Mature Fields Rejuvenation

Golovatskiy, Yuriy; Petrashov, Oleg; Syrtlanov, V. R.; Vafin, Ilnur; Mezhnova, Natalia

doi:10.2118/177334-ms

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Similar redevelopment efforts took place worldwide (O'Brian et al, 2016). A few examples are from Russia (Golovatskiy et al, 2015), India (Sarkar et al, 2015;Tiwari et al, 2015), Indonesia (Waskito et al, 2015), Malaysia (Ng et al, 2016), Australia (Mantopoulos et al, 2015), Egypt (El-Bagoury et al, 2017), China (Rajput et al, 2015), among many others.…”

Section: Introductionmentioning

confidence: 99%

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Challenges of a mature Russian field's redevelopment – Advantages and disadvantages of quick-look geologic modeling

Nemes

Sebők

Csató

2021

CEuGeol

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Due to the global oil price crisis in 2014, one of the MOL's preventive/reactive measures was to identify geologically or commercially risky elements within their portfolio. This involved reevaluation of all geologic data from Field A in the Volga-Urals Basin. In re-evaluating Field A, several unexpected challenges, problems and pitfalls were faced by the interdisciplinary team performing the task of building a new database, quality checking, and interpreting data dating back to 1947. To overcome these challenges related to this mature field, new approaches and fit-for-purpose methods were required in order to achieve the overall goal of obtaining a reliable estimation of remaining hydrocarbon potential. In the first phase a first-pass 3D geologic model was constructed, along with wrangling, cleaning and interpreting 70 years of subsurface data. This paper focuses on the main challenges involved in evaluating or reevaluating reservoir aspects of a mature field.The primary challenges were related to the estimation of remaining in-place hydrocarbon volumes, the optimization of infill well placement, the identification of primary and secondary well targets, the identification of critical data gaps, and the planning of new data acquisitions. The hands-on experience gained during the development of the geologic model provided invaluable information for the next steps needed in the redevelopment of the field.

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Section: Introductionmentioning

confidence: 99%

“…At MOL Group (Hungarian Oil and Gas Public Limited Company), the existing portfolio was revised to minimize risk and maximize value. Similar approaches are described by Golovatskiy et al (2015), Sarkar et al (2015), Tiwari et al (2015), and Rajput et al (2015). The goal was to transform the business to withstand abrupt market changes.…”

Section: Introductionmentioning

confidence: 99%

Challenges of a mature Russian field's redevelopment – Advantages and disadvantages of quick-look geologic modeling

Nemes

Sebők

Csató

2021

CEuGeol

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Polymer Injection to Rejuvenate a Supermature Oil Field, Polymer Pilot Results, 8 TH Reservoir, Austria

Clemens¹,

Kornberger²,

Lueftenegger³

2016

Day 2 Tue, November 08, 2016

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The 8 TH reservoir is a "supermature" field which has been in production for more than 65 years. It was waterflooded for more than 50 years resulting in a current water cut of 96 %. The field contains medium viscous oil (in-situ viscosity 19 cP) and hence was considered for polymer injection despite the high water cut which was suggested by some authors to be challenging for polymer injection. An inverted five spot unconfined polymer injection pilot was performed to reduce the subsurface uncertainties, determine if polymer flooding could lead to incremental oil in "supermature" fields, improve the operating and monitoring capabilities and improve the economic model for full-field implementation. The results of the pilot show that an increase in 5- 10 % of the recovery factor can be achieved in the pilot area. The reasons for incremental oil production by polymer injection in this "supermature" field are acceleration along high permeable flow paths but more importantly substantial flow diversion in this heterogeneous reservoir. In the pilot area, the highest oil production since 1978 was achieved. The main uncertainties related to surface handling of the polymer solution prior to injection, injectivity and incremental oil recovery could be reduced by monitoring of various parameters. In particular tracers and molecular weight distribution of polymers were measured to improve the understanding of the polymer solution effects on reservoir performance. In addition, numerical simulations concerning injectivity and reservoir performance were performed to further improve the understanding of the processes and be able to optimize the operations. The simulations included polymer solution injection induced fractures as well as geological, reservoir fluid/relative permeability and polymer solution property uncertainties and allowed forecasting under uncertainty. The cost structure of the polymer pilot was used to evaluate full-field economics taking learning curves, upscaling and costs optimisations into account.

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A 40 Years Brown Field Rejuvenation

Hassan

Latif

Ashqar

et al. 2019

Day 1 Mon, November 11, 2019

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This paper discusses a comprehensive study to address the uncertainties and troublesome major field development. The west Malaysia field has 7 platforms, and 110 wells. Production started in 1979. The highly complex, elongated anticline structure, possess over 330+ interpreted normal, reverse and wrench faults. It is deposited in Lower Coastal Plain within transgressive system tract. Despite the strong and consistent reservoirs production, recovery Factor (RF) remained at 19% indicating potential remaining value. The new look requirement were imposed as a result of disappointing drilling results mainly due to Key uncertainties in hydrocarbon redistribution, sand continuity and its quality, oil production across adjacent fault blocks. Multicomponent seismic was acquired, to establish an updated reservoirs framework and assist in mapping hydrocarbon, water as well as lithology identification (sand/shale/coal). Several wells were suspended based on the indicative study result. 85 new opportunities were identified, and tiered based on technical confidence and risk appetite. A roadmap consists of detailed development strategies spanning over 5 years and beyond associated with ~100MMstb reserves value that will bring the RF to 31% were proposed. Main study outcomes resulted of reducing sand distribution uncertainty, reservoir extension was clarified and confirmed with the new seismic interpretation result. By passed oil were mapped.

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Huge Mature Fields Rejuvenation

Cited by 4 publications

References 22 publications

Challenges of a mature Russian field's redevelopment – Advantages and disadvantages of quick-look geologic modeling

Challenges of a mature Russian field's redevelopment – Advantages and disadvantages of quick-look geologic modeling

Polymer Injection to Rejuvenate a Supermature Oil Field, Polymer Pilot Results, 8 TH Reservoir, Austria

A 40 Years Brown Field Rejuvenation

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