Key technologies for EOR in fractured-vuggy carbonate reservoirs

被引：0
|
作者：
Kang Z. [1 ]
Li Y. [2 ]
Ji B. [1 ]
Zhang Y. [1 ]
机构：
[1] Petroleum Exploration and Production Research Institute, SINOPEC, Beijing
[2] SINOPEC, Beijing
来源：
Oil and Gas Geology | 2020年 / 41卷 / 02期
关键词：
Carbonate reservoir; EOR; Fractured-vuggy oil reservoir; Gas flooding; Improved water injection;
D O I：
10.11743/ogg20200219
中图分类号：
学科分类号：
摘要：
China is rich in fractured-vuggy carbonate oil reserves, with proved reserves in place of 29.3×108 t, which has become an important target for China's hydrocarbon exploration and development, and important contributor for the increase of reserves and production. Due to the low reservoir and fluid description accuracy, the variation in flow patterns, and the difficulty to predict flow pattern by simulation of carbonate fractured-vuggy reservoirs in a burial depth of 6500m, the transverse flow in water injection is prone to cause abrupt watered-out wells, resulting in a low recovery rate of only 14.9%. Development and production in such reservoirs are a world-class problem. After many years of research and practice, we developed a series of technologies to enhance oil recovery, including geophysical description, geological modeling, water and gas injection, and acid fracturing. The developed STOOIP has increased 42% with an EOR(enhanced oil recovery) of 2.3 percent in the structural units tested with the new technologies, which are applicable to the development of similar deep or ultra-deep reservoirs with strong heterogeneity. © 2020, OIL & GAS GEOLOGY Editorial Board. All right reserved.
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页码：434 / 441
页数：7
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