油气藏产量递减规律的研究与可采储量的预测  

Production Decline Rules and Recoverable Reserve Prediction

作　　者：王俊魁 

机构地区：[1]大庆石油国际工程公司,黑龙江大庆163712

出　　处：《新疆石油地质》2007年第2期189-193,共5页Xinjiang Petroleum Geology

摘　　要：根据产量递减曲线变化特征,建立了产量递减率微分方程,并由此得到了描述产量递减规律的无因次递减方程。该方程表明,对于任何油气藏产量出现递减以后,在直角坐标中无因次累积产量与无因次时间都是一条通过坐标原点、斜率为1的直线,据此可以外推预测油气藏的累积产量与年产油量。推导了产油量随累积产油量变化关系方程,根据这个方程可以预测油气藏的剩余可采储量与废弃年产油量两项重要开发指标。应用递减方程研究了油气藏递减时储采比的合理界限。用较多的实例证实了递减率微分方程与相关公式的正确性与实用性,这些公式可用于油气藏工程研究与预测。A differential equation for production decline rate is set up based on the study of variation of production decline curve, by which the dimensionless decline equation for describing the production decline rule is deduced. This equation shows that after oil production decline of any reservoir occurs, the dimensionless cumulative production rate and dimensionless time in rectangular system are all straight lines which pass through origin of coordinates with slope of 1, hence the cumulative production rate and annual oil production rate of the reservoir could be extrapolated and predicted. The equation for variation of production rate with cumulative production rate is then derived. By this equation, the residual recoverable reserves and abandoned annual production rate could be predicted. In addition, the reasonable limit of reserve-production ratio when production decline occurs is researched. Case studies indicate the correctness and practicability of these equations which can be used in reservoir engineering study and prediction.

关 键 词：递减率 产量 可采储量 储采比 预测 

分 类 号：TE331[石油与天然气工程—油气田开发工程]