多重复合油藏探测半径计算与地层压力分布
Formation Pressure Distribution and Investigation Radius in Multiple Composite Reservoir
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- 引用格式:
-
邓,琪,张宏友,汪全林,谭,捷,靳心伟.多重复合油藏探测半径计算与地层压力分布[J].天然气与石油,2019,37(3):0.doi:
Deng Qi, Zhang Hongyou, Wang Quanlin, Tan Jie, Jin Xinwei.Formation Pressure Distribution and Investigation Radius in Multiple Composite Reservoir[J].Natural Gas and Oil,2019,37(3):0.doi:
- DOI:
- 作者:
- 邓 琪 张宏友 汪全林 谭 捷 靳心伟
Deng Qi, Zhang Hongyou, Wang Quanlin, Tan Jie, Jin Xinwei
- 作者单位:
- 中海石油(中国)有限公司天津分公司
Bohai Oilfield Research Institute of CNOOC Ltd.
- 关键词:
- 探测半径;多重径向复合;不稳定压力解;试井解释
Investigation radius; Multiple composite reservoir; Unstable pressure analytic expression; Well test analysis
- 摘要:
探测半径是油气田开发方案编制的一个重要参数,但目前釆用的软件无法准确计算复合地层探测半径,针对这一问题，在分析研究双重径向复合油藏压力变化特点的基础上,采用虚拟探测半径校正法,推导了双重径向复合油藏探测半径与地层压力分布计算公式。以此为基础得出了多重径向复合油藏探测半径计算公式与不稳定压力解析表达式。研究发现随着流度比的增加,探测半径逐渐降低,且降低幅度越来越小。应用实例表明,该方法简单可靠,更能准确描述复合油藏的探测特点。
Investigated radius is an important parameter in oil and gas field development.In multiple composite reservoir, the investigation radius cannot be calculated by the existing software accurately.In view of this problem, this paper deduced the formula for calculating investigation radius and formation pressure distribution in dual composite reservoir, by using the virtual investigated radius method.On this basis, the investigation radius and unstable pressure analytic expression were derived in multiple composite reservoir.The study found that with the increase of mobility ratio, the investigation radius reduced gradually, and the decrease rate tended to small. The application confirmed that the method was simple and reliable, and could accurately describe the pressure characteristics of composite reservoir.
