普通稠油油藏多元热流体驱提高采收率实验研究  

Experimental Study on Enhancing Oil Recovery of Conventional Heavy Oil Reservoir by Multi-component Thermal Fluid Displacement

作　　者：张明龙 ZHANG Minglong(Engineering Technology Department,PetroChina Huabei Oilfield Company,Renqiu,Hebei 062550,China)

机构地区：[1]中国石油华北油田工程技术部,河北任丘062550

出　　处：《西安石油大学学报（自然科学版）》2023年第6期63-67,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油天然气股份有限公司“华北油田持续有效稳产勘探开发关键技术研究与应用”(2017E-15)。

摘　　要：为了提高普通稠油热采效果,采用天然岩心填砂管模型,在室内开展蒸汽驱、CO_(2)+N_(2)驱、蒸汽+CO_(2)驱、蒸汽+N_(2)驱、蒸汽+CO_(2)+N_(2)驱实验研究。结果表明:在常规水驱至含水90%后,蒸汽+CO_(2)+N_(2)驱出口剩余温度最高,达到88℃,蒸汽驱剩余温度最低,仅为54℃;蒸汽+CO_(2)+N_(2)驱、蒸汽+N_(2)驱的地层压力保持水平最高,分别为80.3%、78.4%;N_(2)+CO_(2)驱的气油比上升最快,在注入量为2.5 PV时达到2000 m^(3)/m^(3),蒸汽驱的气油比上升最慢,在注入量达到4.52 PV时达到2000 m^(3)/m^(3);蒸汽+CO_(2)+N_(2)驱的驱油效果最好,采收率达到68.31%,比常规水驱高29.76%,而CO_(2)+N_(2)驱最低,仅比常规水驱高7.09%。In order to improve the thermal recovery effect of conventional heavy oil reservoirs,the laboratory experiments of steam displacement,CO_(2)+N_(2)displacement,steam+CO_(2)displacement,steam+N_(2)displacement and steam+CO_(2)+N_(2)displacement were carried out using natural core sand-filling pipes.The results show that after conventional water flooding to water cut of 90%,the exit temperature of steam+CO_(2)+N_(2)flooding is the highest,reaching to 88℃,and that of steam flooding is the lowest,only 54℃.Steam+CO_(2)+N_(2)flooding and steam+N_(2)flooding maintain higher formation pressure levels,which are 80.3%and 78.4%,respectively.The gas-oil ratio of N_(2)+CO_(2)flooding increases the fastest,reaching 2000 m^(3)/m^(3)at an injection volume of 2.5 PV;The gas-oil ratio of steam flooding increases the slowest,reaching 2000 m^(3)/m^(3)when the injection volume reaches 4.52 PV.Steam+CO_(2)+N_(2)flooding has the best oil displacement effect,with an oil recovery rate of 68.31%,which is 29.76%higher than conventional water flooding;And that of CO_(2)+N_(2)flooding is the lowest,only 7.09%higher than conventional water flooding.

关 键 词：多元热流体驱 提高采收率 普通稠油油藏 

分 类 号：TE345[石油与天然气工程—油气田开发工程]