致密油水平井体积压裂攻关试验区单井产量主控因素分析  

Analysis of the Primary Controlling Factors to Single-Well Output of Horizontal Well of Tight Oil with Volumetric Fracturing at Experimental Area

作　　者：李卫成[1,2] 叶博[1,2] 张艳梅[1,2] 郝炳英[1,2] 张居增[1,2] 马文忠[1,2] 

机构地区：[1]长庆油田分公司勘探开发研究院,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《油气井测试》2017年第2期33-36,共4页Well Testing

基　　金：国家重大基金项目"中国非常规油气储层分类与典型地质模型建立"(41390451)内容

摘　　要：针对W233试验区内北部水平井持续自喷高产,单井日产油量、井均累计产油量远高于南部的问题,尝试从地质、压裂工艺两方面开展南、北区水平井差异性分析,希望找出北区水平井长时间高产的主控因素,为后续致密油的规模、高效开发以指导。结果表明,大厚度、优质烃源岩是北区持续高产的资源基础,高溶解气油比是水平井自喷的关键因素;高排量、大入地液量增大了储层改造体积,是持续高产的首要条件,在有限的高砂比下,大量支撑剂进入缝网系统是高产的必要条件;"大排量、大砂量、大入地液量"体积压裂理念在试验区的成功运用为国内致密油的规模开发起到技术引领作用。According to the problems of high artesian output for the horizontal wells at north part of the W233 experimental,whose daily output of single well and average cumulative oil volume of every well are more higher than the south part's,the difference analysis between the north and the south is carried out from geology and fracturing technology in order to find out the primary controlling factors to high output about north horizontal well,which can direct the late high efficiency and scale development of tight oil.The results show that the thick and good source rock are the resource basement to the artesian development of the northern part,the high gas-to-oil ratio is the key factor to flow of horizontal wells and high injection rate together with high injection fluid volume increases stimulated reservoir volume,which is the first condition of high output,and under the limited high sand-fluid ratio,it is the necessary condition that a large volume of proppant enters into network system.The Volumetric Fracturing idea of high injection rate,large sand quantity and high injection fluid volume is applied successfully in the experimental area is a technology guide for the scale development of domestic tight oil.

关 键 词：烃源岩 高气油比 体积压裂 大排量 大砂量 大入地液量 

分 类 号：TE357[石油与天然气工程—油气田开发工程]