复杂断块低渗油藏注水井试井分析方法  

The Well Test Analysis Methods of Injection Wells in Complex Fault Block Low Permeability Reservoirs

作　　者：石文志[1] 

机构地区：[1]西安石油大学石油工程学院,陕西西安710065

出　　处：《兰州石化职业技术学院学报》2016年第1期1-3,共3页Journal of Lanzhou Petrochemical Polytechnic

基　　金：国家自然科学基金(51174219)

摘　　要：针对G油田G3102低渗区内存在注水困难的情况,为了探讨低渗区块高压增注注水井增注机理,研究采用了多级变流量测试方案,即在低、高流量注入后分别进行压降测试,运用渗流力学理论,对两次不同注入量下的压降测试进行解释,对比解释结果。同时借助数值试井方法,分析流体在不同注入量下的流动扩散情况,研究表明地层在高压增注后,进井带有裂缝产生,驱油效果增强,对应油井见效,由于低渗透启动压力的存在,造成压力导数曲线上翘。试井解释和数值试井方法相结合,确定地层在高压注入下呈现线性流动状态。In G Oilfield low permeability zone,there are water difficult situations,in order to investigate the low permeability blocks high- pressure augmented injection increase mechanism,this study uses the multiple variable flow rate test scheme,namely in the low and high flow injection drop test,by using the theory of percolation mechanics,and considering starting pressure gradient of pressure drawdown test analysis mathematical model,with application model of two different injection pressure drop test under the interpretation,comparison and explanation of the results. At the same time,by using numerical well test method,analysis of fluid in different injection volume flow diffusion is carried out. The results show that formation in high pressure injection increases into the well with cracks,oil displacement efficiency enhancement and corresponds well,due to the presence of the starting pressure of low permeability,resulting in pressure derivative curve upwards. Well test interpretation and numerical test methods are combined to determine the formation of a linear flow under high pressure injection.

关 键 词：低渗 数值试井 多级变流量测试 线性流 

分 类 号：TE353[石油与天然气工程—油气田开发工程]