摘要
针对加密井网注采不平衡、复合油藏地层压力评价难的问题,进行了多井系统复合油藏平均地层压力计算方法的理论研究。根据物质平衡原理,建立了考虑注采强度影响的多井系统复合油藏拟稳定渗流数学模型,给出了平均地层压力的计算方法,验证了该平均地层压力计算方法的正确性,分析了平均地层压力的影响因素。研究结果表明:注采比与平均地层压力呈正相关,多井系统复合油藏平均地层压力的计算,需要考虑注采比影响,以便准确评价地层压力。将研究成果应用于喇嘛甸油田地层压力水平解释,注采比大于1,地层存在多余能量补充,该方法得到的平均地层压力介于关井末点压力和水驱平均地层压力之间,更符合实际,可为油田制订合理开发政策提供依据。
In view of the injection-production imbalance in infilling well network,a theoretical study on the average formation pressure calculation for the composite oil reservoir multi-well system was carried out to improve the composite oil reservoir formation pressure evaluation.According to the principle of material balance,a mathematical model of pseudo-steady seepage for the composite oil reservoir with multi-well system was established by considering injection-production intensity.An average formation pressure calculation is finally given to study the sensitivities of injection-production ratio,mobility ratio,composite radius and other factors.Research indicates that the injection-production ratio is positively correlated with the average formation pressure.The injection-production ratio should be considered in the average formation pressure calculation of the composite oil reservoir with multi-well system to gain a more reasonable evaluation.This method was applied to the formation pressure interpretation in Lamadian Oilfield to effectively utilize the available injection-production ratio in formation pressure evaluation.A more reasonable average formation pressure for the composite oil reservoir with injection-production imbalance can be obtained through this calculation,which could provide a basis for the development policy optimization.
作者
尹洪军
文刚
邢翠巧
付京
Perapon Fakcharoenphol
Yin Hongjun;Wen Gang;Xing Cuiqiao;Fu Jing;Perapon Fakcharoenphol(Northeast Petroleum University,Daqing,Heilongjiang 163318,China;MOE Key Laboratory of Enhanced Oil Recovery,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Mewbourne School of Petroleum&Geological Engineering,University of Oklahoma,Oklahoma Norman OK,USA 73019;Colorado School of Mines,Golden Colorado,USA 80401)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第4期76-80,共5页
Special Oil & Gas Reservoirs
基金
国家科技重大专项“致密油体积压裂试井方法研究”(2017ZX05071005)
黑龙江省自然科学基金项目“致密油蓄能体积压裂渗流机理研究”(E2016015)
关键词
复合油藏
多井系统
注采比
地层压力
拟稳定渗流
composite oil reservoir
multi-well system
injection-production ratio
formation pressure
pseudo-steady flowing
