一种基于相渗资料与动态数据的裂缝和基质水驱动用程度计算方法  

A Method for Calculating the Degree of Water Drive Between Fracture and Matrix Based on Phase Permeability Data and Dynamic Data

作　　者：李廷礼 蔡晖 张章 葛丽珍 张墨 LI Ting-li;CAI Hui;ZHANG Zhang;GE Li-zhen;ZHANG Mo(CNOOC China Limited Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《数学的实践与认识》2024年第4期100-109,共10页Mathematics in Practice and Theory

基　　金：中国海洋石油有限公司“十四五”重大科技项目“海上油田大幅度提高采收率关键技术”(KJGG2021-0501)。

摘　　要：利用水驱油机理研究裂缝性油藏注水开发过程中裂缝系统、基质系统产量贡献与采收率变化规律,对制定油田开发技术政策具有重要意义.根据注采守恒原理和渗吸机理,利用Welge水驱方程,推导了水驱开发过程中裂缝系统、基质系统的产油量、采出程度计算方法.该方法基于相渗资料和动态数据,利用Welge水驱方程通过产出端含水率计算裂缝系统含水饱和度,采用注采守恒原理计算裂缝系统、基质系统的存水量,根据渗吸机理计算裂缝系统、基质系统水驱储量采出程度,最终计算得到水驱开发过程中裂缝系统、基质系统的含水饱和度、含水率、产油量与采出程度变化情况.实例计算表明,该方法能够表征裂缝性油藏水驱开发过程中裂缝系统、基质系统的含水变化特征与水驱开发规律,可为制定该类油田开发技术政策提供依据.According to the mechanism of water flooding,it is of great significance to study the production contribution and reserve production of fracture system and matrix system in the process of waterflooding development of fractured reservoir.According to the conservation principle of injection and production and imbibition mechanism,the calculation method of oil production and recovery degree of fracture system and matrix system in the process of water flooding development is deduced by using Welge water flooding equation.Based on the phase permeability data and dynamic data,the Welge water displacement equation is used to calculate the water saturation of the fracture system through the water cut at the output end,the conservation principle of injection and production is used to calculate the water storage of the fracture system and matrix system,and the recovery degree of water displacement reserves of the fracture system and matrix system is calculated according to the imbibition mechanism.Finally,the changes of water saturation,water cut,oil production and recovery degree of fracture system and matrix system in the process of water flooding development are calculated.The calculation results show that this method can quantitatively characterize the water cut variation characteristics and water drive development law of fracture system and matrix system in the process of water drive development of fractured reservoir,which can provide a basis for formulating the development technology policy of this kind of oilfield.

关 键 词：裂缝性油藏 相渗曲线 渗吸 基质 采出程度 水驱采收率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]