Technique Policy for Concurrent Development of Gas Cap and Oil Rim of Gas Cap Reservoir

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Zifei, Fan^1 ; Heng, Song^1 ; Angang, Zhang^1 ; Xuelin, Wu^1

Petro China Research Institute of Petroleum Exploration and Development, Beijing

100083, China^1

关键词: Concurrent development;    Development effect;    Development modes;    Gas-cap reservoir;    Injection production ratio;    Oil recoveries;    Water injection wells;    Well networks;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/4/012012/pdf
DOI  :  10.1088/1755-1315/186/4/012012

来源: IOP

【 摘 要 】

For the A South and Γ North reservoir of Zhanzhol oil field in Kazakhstan, only the oil rim was developed since 1983. Recently, the gas cap of A South reservoir was exploited in September, 2014. However, the concurrent production of gas cap and oil rim is likely to cause the pressure imbalance, which will lead to the worse development effect of the whole reservoir. In order to acquire the efficient concurrent production of gas cap and oil rim, the technique policy charts of concurrent production are established, involving three types of development mode such as depletion development, barrier water injection development and barrier plus pattern water injection development. For depletion development, rational oil recovery rate increases with rational gas recovery rate; for barrier water injection development, the rational position of barrier water injection well moves towards the inner oil-gas contact with the increase of gas recovery rate and injection-production ratio; for barrier plus pattern water injection development, the rational ratio of barrier water injection to pattern water injection increases with gas recovery rate and injection-production ratio. By improving the well network of barrier plus pattern water flooding and the ratio of barrier water injection to pattern water injection, the concurrent of oil rim and gas cap of A South reservoir was carried out. Furthermore, 2.3 billion of natural gas was yielded yearly. The control degree of water flooding of oil rim was enhanced; the natural decline rate of oil rim decreased and the development effect of oil rim improved greatly.