低渗透油藏产能评价的非线性方法  

NON-LINEAR METHOD FOR PRODUCTIVITY EVALUATION OF LOW-PERMEABILITY RESERVOIRS

作　　者：王延忠[1,2] 董平川[1] 马继红[3] 张博[1] 刘欢乐[1] 

机构地区：[1]中国石油大学,北京 102249 [2]中国石油化工股份有限公司胜利油田分公司地质院,山东东营257015 [3]大庆油田有限责任公司第四采油厂,黑龙江大庆163511

出　　处：《大庆石油地质与开发》2011年第3期84-88,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：国家自然科学基金项目（50574059和50004002）和国家“十五”科技攻关项目（2004BA616A02-03-01-02）.

摘　　要：胜利盐家油田的盐22块属于深层低渗透砂砾岩油藏。它产能评价难度大的主要原因是储层存在启动压力梯度和压敏效应，同时油井还采取了压裂措施。为此，通过处理启动压力梯度和应力敏感性实验数据，得到二者随渗透率的变化规律。综合考虑启动压力梯度、压敏效应和压裂裂缝的影响，得出了符合本区块的油井产能评价公式。在此基础上给出了油井产能的递减规律，所得到的结果可以指导油田的实际生产。Block-22 in Shengliyanjia Oilfield belongs to the deep glutenite reservoirs with low permeability. The difficulty of producti-vity evaluation is mainly the kick-off pressure gradient and pressure sensitivity effect, and meanwhile the wells have been fractured. Through the treatment of kick-off pressure gradient and stress sensitivity experiment data, the changing law for both kick-off pressure gradient and stress sensitivity effect with permeability is obtained. Comprehensively considering the influence of kick-off pressure gradient, pressure sensitivity effect and fractures, the productivity evaluation formulation according witb the block is derived. On this basis, this paper gives the decline law for well productivity, and the result has a guiding significance for oilfield production.

关 键 词：低渗透 产能评价 启动压力梯度 压敏效应 压裂 

分 类 号：TE348[石油与天然气工程—油气田开发工程]