冷家油田储采比与递减率关系及合理性研究

开发实践一致认为,储采比与递减率紧密相关.为了研究二者的相关程度,从储采比和递减率定义入手,详细研究并推导了具有代表性的6种产量变化规律储采比与递减率的理论关系式及确定合理储采比界限方法,并尝试性地应用于冷家油田不同油品油藏中,效果较好.储采比是影响递减率的一项重要指标,该油田递减率随储采比的降低而不断增大,且围绕理论曲线上下波动,对其他油田研究储采比与递减率关系有一定借鉴价值,并将合理储采比计算值与其实际相结合,参考有关文献,给出了该油田不同油品油藏合理储采比下限值,最后对其稳产趋势进行分析,为油田稳产形势的评价及规划提供了可靠的理论基础.

Relation of Reserve-Production Ratio and Decline Rate in Lengjia Oilfield and Rationality Study

Oilfield planners think unanimously that reserve-production ratio is closely related to decline rate.In order to study their correlativity,this paper derives 6 typical,theoretical,relational expressions of reserve-production ratio and decline rate by starting with their definitions,determines the method of rational reserve-production ratio limitation,which has been attempted in different oil reservoirs in Lengjia Oilfield and achieved good result.It is point out that reserve-production ratio is an important index affecting decline rate.The decline rate of this oilfield increases along with the decreasing of reserve-production ratio,and fluctuates around the theoretical relation.This provides reference to the study in other oilfields.This paper combines calculated and practical reserve-production ratios,refers to concerned literatures,gives the cutoff value of reserve-production ratio of different oils in this oilfield,and analyzes the trend of stable production.