多分支垂直裂缝井不稳定渗流分析  

Analysis of unsteady state flow in vertically fractured multi-lateral wells

作　　者：姜永[1] 王新海[1] 汪金如[1] 袁恒龙[2] 

机构地区：[1]油气资源与勘探技术教育部重点实验室长江大学,湖北荆州434023 [2]中油辽河油田公司,辽宁盘锦124107

出　　处：《特种油气藏》2011年第6期70-72,127,共3页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2008ZX05013)部分研究内容

摘　　要：针对塔里木油田库车前陆盆地砂岩地层发育大量高倾角裂缝等特征,建立双孔介质油藏多分支垂直裂缝井渗流数学模型。对模型进行数值求解,绘制并分析裂缝参数对压力动态典型曲线的影响。结果表明:流体在多裂缝系统的流动特征与裂缝分布有关,裂缝的分支数、长度、导流能力等均为影响该类油藏试井曲线形态的因素。由于地层中裂缝的发育,使得其压力响应特征曲线与一般的双孔油藏响应特征曲线有一定的差别,正确选择压力动态典型曲线直线段是多裂缝系统垂直裂缝井试井分析的关键。A large number of high dip angle fractures are developed in the sandstone formations in Kuqa foreland basin of Tarim Oilfield.A mathematical model has been set up to study the flow in the vertically fractured multi-lateral wells in the dual porosity reservoirs.Numerical solutions of the model were obtained and the influences of fracture parameters on the typical curves of pressure behavior were analyzed.The study results indicated that the flow characteristics of fluids in a multi-fracture system were related to the distribution of fractures.The number,length and flow conductivity of fractures were all factors affecting the well test curves in such reservoirs.Due to the development of fractures in the formations,the pressure response curves in such reservoirs were somewhat different from those in ordinary dual porosity reservoirs and the correct selection of the straight line segment from the typical curves of pressure behavior was the key to well test analysis for vertically fractured wells in multi-fracture systems.

关 键 词：垂直裂缝井 渗流模型 导流能力 典型曲线 

分 类 号：TE33[石油与天然气工程—油气田开发工程]