低渗油藏空气泡沫驱提高采收率潜力评价新模型  

A new model for evaluating the recovery potential of air foam flooding in low permeability reservoirs

作　　者：张冰 金志 白慧芳 王成俊 Zhang Bing;Jin Zhi;Wang Chengjun(Shaanxi Yanchang Petroleum (Group) Co.,Ltd.,Sales Company,Xi'an,ShaanXi 710075,China;Research Institute of Shaanxi Yanchang Petroleum (Group) Co.,Ltd.,Xi'an,ShaanXi 710075,China)

机构地区：[1]陕西延长石油(集团)有限责任公司销售公司,陕西西安710075 [2]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《非常规油气》2019年第4期71-75,共5页Unconventional Oil & Gas

基　　金：省部级项目“特低渗透油藏高效开发提高采收率示范工程”(陕国土资矿发(2011)80号)ycsy2012ky-G-03;国家科技支撑计划“陕北煤化工CO2捕集、埋存与提高采收率技术示范”(2012BAC26B00)联合资助

摘　　要：为了评价低渗油藏空气泡沫驱提高采收率潜力,采用经典两相渗流理论,并考虑低渗油藏渗流特征和泡沫驱油机理,建立了低渗油藏空气泡沫驱潜力评价模型,研究表明:该模型用一维驱替计算代替二维平面驱替计算,使渗流关系相对简化,易于计算;考虑启动压力梯度、应力敏感系数及泡沫吸附、界面张力效应和流动减小因子等对模型进行了修正,使模型更符合实际;利用实例进行模拟计算,与商用软件Eclipse计算结果对比,误差小于5%,计算速度比商用软件快10倍以上,证明了该模型计算速度快、结果可靠。因此,该模型对指导空气泡沫驱现场应用具有一定的实用价值。In order to evaluate the potential of enhanced oil recovery by air foam flooding in low permeability reservoirs,the classical two-phase percolation theory was adopted,and the seepage characteristics and foam displacement mechanism of low-permeability reservoirs were considered.The convergence of the model was improved by the method of shunt theory.The research shows that the model replaces the two-dimensional plane displacement calculation with one-dimensional displacement calculation,which makes the seepage relationship relatively simple and easy to calculate.The model was modified by considering starting pressure gradient,stress sensitivity coefficient and foam adsorption,interfacial tension effect and flow reduction factor to make the model more realistic.The new model was used to evaluate he potential of enhanced oil recovery of the example.by air foam flooding.The calculation resultswere compared with the calculation results of the commercial software Eclipse.The erro rwas less than 5%,and the calculation speed was 10 times faster than the commercial software.It proves that the model is fast and reliable.Therefore,the model has certain practical value for guiding the field application of air foam flooding.

关 键 词：空气泡沫驱 潜力评价 分流理论 低渗油藏 

分 类 号：TE357[石油与天然气工程—油气田开发工程]