裂缝性油藏井网水驱油物理模拟研究  

Experimental research on waterflooding physical simulation in well pattern of fractured reservoir

作　　者：张立强[1] 孙雷[1] 陈丽群[1] 陈莹莹[2] 董卫军 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石化中原油田分公司采油二厂,河南濮阳457532 [3]重庆矿产资源开发有限公司,重庆400000

出　　处：《断块油气田》2013年第3期341-345,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项"复杂裂缝性碳酸盐岩油藏开发关键技术研究"子课题"裂缝性碳酸盐岩油藏渗流机理物理模拟研究"(2008ZX05014-004)

摘　　要：为了更好地对裂缝性油藏进行井网优选,根据实际油藏地质特征,利用相似准则制作裂缝性油藏物理模型,开展了井网水驱油实验。通过对比不同注采井网采出程度与含水率的变化,进行井网类型优选。文中对比了5种井网的开发效果,实验及分析结果表明:对于该裂缝性油藏模型,九点井网的采收率最高,这验证了裂缝性油藏吸水能力较强的特点;其余井网的采收率从高到低依次为五点井网、排状井网、反五点井网、反九点井网,这4种井网由于强注强采,导致含水率迅速上升,驱油效果不理想,但当存在合理的裂缝分布及有效的井间干扰时,局部采油井的采收率会得到提高;可以用丁型水驱特征曲线预测该油藏的动态变化。文中的研究方法及成果对裂缝性油藏井网优选具有一定的指导意义。In order to belier oplimize the well pattern of fractured carbonate reservoir, tile waterfloodiog experiment in well paliern was carried oul with physical model which was made using similarity criteria and according to the geological features of actual reserwoir. The lype of well pattern was optimized through eomparing the changes of the recovery efficiency and water cut in differenl injection-production well patterns. The development effect of five kinds of well patterns was compared in this paper. The experimental and analytical resuhs show that the recovery efficiency of nine-spot pattern is the highest for this fractured reserw^ir model, which verifies lhe stronger water absorbing ability of the fractured reservoirs. Then it is followed by five-spo! pattern, row we.II pattern, inverted five-spot pattern, inverled nine-spnt pattern. The forced injection and forced production of these font well patterns wouht lead 1o the rapid rise of waler cut, whose flooding effect was not very satisfactory. However, when there is reasonable dislribulion of fi＇actures or efficient cross-well disturbance, the recovery efficiency of the local oil well wouht be improved. The D- lype water drive characteristic curves could he used to predict the dynamic changes of this reservoir model. The research methods and resuhs in lhis paper have certain guiding significance on well pattern optimization of fractured reservoir.

关 键 词：裂缝性油藏 物理模拟 井网优选 水驱效率 水驱特征曲线 

分 类 号：TE319[石油与天然气工程—油气田开发工程]