Integrated Reservoir Study of Shushufindi Field - Dynamic Modeling

Ohen, Henry A.; Erian, Adel; All, Liaqat; Guzmán, Daniel Sánchez; Guerrero, Olga; Ochoa, José; Valdivieso, Luis

doi:10.2523/89465-ms

Cited by 3 publications

(2 citation statements)

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“…A summary of the results and an analysis of the Integrated Reservoir Study of the Shushufindi Field presented by Ohen et al 1 is considered below.…”

Section: Integrated Reservoir Studymentioning

confidence: 99%

“…Ziritt, SPE, Petro Ecuador performance of the field and to find opportunities to increase oil production a 3D reservoir study was engaged. Nevertheless, the results of the integrated reservoir study presented by Ohen et al 1 in paper SPE 89465 are not satisfactory in helping understanding the reservoir behavior and field performance. The Shushufindi field has been considered a "mature" field but these recent results suggest we are still dealing with an unknown field.…”

Section: Introductionmentioning

confidence: 99%

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Mature vs. Unknown, Where Are We Really? – An Ecuadorian Field Case

Ziritt

2005

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“…A summary of the results and an analysis of the Integrated Reservoir Study of the Shushufindi Field presented by Ohen et al 1 is considered below.…”

Section: Integrated Reservoir Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mature vs. Unknown, Where Are We Really? – An Ecuadorian Field Case

Ziritt

2005

All Days

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Strategies and Techniques for a Giant Sandstone Oilfield Development: A Road Map to Maximize Recovery

Wang²,

Yong-qing³

2006

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Daqing, the largest heterogeneous multi-layer none marine reservoir oilfield in China celebrated its 45thbirthday in Ocotober 2005. Boasting 27 continuous years of plateau oil production over one MMBOD, the largest industry polymer-flooding oilfield in the world, and excellent developing effect, its development strategies and techniques applied provide a road map to maximize oil recovery:Life cycle reservoir studies give insight into reservoir, and providea foundation for plan of development, implementation of infilling, and associated workover jobs such as zonal stimulation, zonal waterplugging.Early reservoir pressure maintenance by internal water flooding maintains reservoir pressure close to its original status, providing sufficient reservoir energy, enabling high and stable production rate for a long period as well as improving recovery.Performance monitoringconducted in the whole process of development, of which, separate layer performance monitoring is one of the most important foundation for in-depth understanding subsurface development potential.Pilot tests are conducted before any key development strategies and measures are applied to ensure their success.Separate layer production/water injection of multi-layer and heterogeneous reservoir and novel completion are the key measures for enhancing poorly drained reservoir water flooding, improvingits sweeping efficiency.Multi-time and progressive infilling drilling develops bypass oil resulting fromthe geological complexities of reservoirs.Widely applying polymer flooding enhances oil recovery by over 10%.Innovativetechnology makesdevelopment of marginal reservoirs/fields economical. Outstanding development of the giant field has proven the validity of above strategies and techniques with an oil recovery factor current at over 51% in the main block. Introduction Major challenges facing petroleum industry are to maximize recovery for a mature asset, extend the life of traditional producing areas, to optimize development of a new field as new reserve becomes increasingly complex. The average conventional crude oil recovery quoted in petroleum industry is 35%. However, a 10% incremental recovery translates to about 1.4 trillion barrels of recoverable resources, or roughly an additional 50-year supply of global crude consumption at current rates (Saleri, 2006). The estimate reminds us that there are vast potential resources of hydrocarbons in the world thatare waiting for new technology to tap them. Numerous efforts focusing on matured assets aiming at finding new oil in old reservoir and revitalizing old-field have been made. These efforts emphasize the importance of application of integrated approaches or multidisciplinary reservoir management. However, maximizing oil recovery is not only a system engineering, but also lifecycle process running through various stages of oilfield development from initial development, production increasing and reaching its plateau, to production declining as the oil field reaches the mature state of its development.

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Successful Co-Development of Oil and Gas Reservoirs, A Case Study

2015

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Jake field, discovered in July, 2006, contains 10 oil-producing and 12 condensate gas-producing zones. The total number of drilled was 19, including 5 updip wells penetrated oil and gas zones, the remaining 14 downdip wells completed at principal oil zones. A unique co-development project of oil and gas had been performed since the start-up of field in July, 2010, including three phases: Phase I: Prior to start-up of the field, In-situ gas injection was initiated. Single tubing string completion was utilized in updip wells, packer isolated oil and gas zones so that high-pressure gas could produce from the tubing and oil could produce from the annulus. After commencement, gas from updip wells was injected into downdip wells to maintain reservoir pressure and minimize water influx. The remaining gas was used to gas-lift at updip wells. Phase II: Following pressure depletion of oil and condensate gas zones, gas-lift wells became inefficient. The packerless tubing string was extended to the bottom of perforations for commingling production of oil and gas condensate zones at updip wells. Well stream was produced from the casing annulus while recycling gas was injectied from compressors into the tubing for gas lift. Nitrogen injection was conducted at downdip wells. Phase III: After water breakthrough, infill wells between updip and downdip wells were drilled for nitrogen injection to mitigate the water cut rising trend. Actual production performance of oil and gas co-development is better than sequential production of oil and gas. Initial well production at two producers reached over 10,000 BOPD, Current recovery factor for oil is 25% and gas is 36%. Oil is producing at the level of 18,000 BOPD with average offtake rate of 5.8%. Simulation confirmed that ultimate recovery factor for oil could be over 50%.

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Integrated Reservoir Study of Shushufindi Field - Dynamic Modeling

Cited by 3 publications

References 0 publications

Mature vs. Unknown, Where Are We Really? – An Ecuadorian Field Case

Mature vs. Unknown, Where Are We Really? – An Ecuadorian Field Case

Strategies and Techniques for a Giant Sandstone Oilfield Development: A Road Map to Maximize Recovery

Successful Co-Development of Oil and Gas Reservoirs, A Case Study

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