召10区块开发井网优化及加密调整分析  

Optimization and infill adjustment of development well patterns in Zhao 10 Block

作　　者：郭平[1] 顾蒙[1] 彭松[2] 孙振[1,3] 成育红 汪周华[1] GUO Ping;GU Meng;PENG Song;SUN Zhen;CHENG Yuhong;WANG Zhouhua(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China;Exploration and Development Research Institute, SINOPEC Zhongyuan Oilfield Company, Puyang 457000, Henan, China;No.5 Gas Production Plant, CNPC Changqing Oilfield Company, Uxin Banner 017300, Inner Mongolia, China)

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 [2]中原油田勘探开发研究院 [3]中国石油长庆油田分公司第五采气厂

出　　处：《石油钻采工艺》2017年第1期14-19,共6页Oil Drilling & Production Technology

基　　金：国家留学基金"西部地区人才培养特别项目"(编号:201508515157);国家自然科学基金青年科学基金项目"基于密度泛函理论研究页岩气藏气固吸附微观机理"(编号:51204141)

摘　　要：召10区块原设计井网密度较小,并且由于滚动开发及集中建产,目前井网分布极不均衡。为提高区块开发效果,在新的地质及动态特征认识基础上,采用气藏工程、数值模拟、经济评价等多种方法对原有井网方案进行优化调整。研究结果表明:对于未布井区域,直井井网密度可调整为3.33口/km^2,相应井排距为500 m×600 m;在目前600 m×800 m井网模式下直接进行规则加密虽可一定程度提高气藏采收率,但经济不可行。直井垂向储量动用具有优势,水平井平面储量动用程度更高,并且水平井可有效提高单井产量,因此区块最终可采用直井+水平井混合井网,此井网可使区块采收率提高到46.9%。In Zhao10Block,the well patterns were originally designed with small spacing density,and progressive developmentand concentrated construction were carried out,so at present,the distribution of well patterns is quite uneven.In order to improve thedevelopment results of this block,the original well pattern plans were optimized and adjusted by means of multiple methods(e.g.gasreservoir engineering,numerical simulation and economic evaluation)after the geological and dynamic characteristics were newly understood.It is indicated that in the areas where no well is arranged,the spacing density of vertical well patterns can be set at3.33wells/km2with the corresponding spacing of500m×600m.For the well patterns with spacing of600m×800m,regular infilling can,to someextent,increase the recovery factor of gas reservoirs,but it is economically infeasible.Vertical wells are advantageous in vertical reservesproducing and horizontal wells are higher in areal reserve producing degree.Besides,horizontal wells can increase individual-well productionrate effectively.Therefore,combined well patterns of vertical well+horizontal well can be ultimately used in this block,whichcan increase the recovery factor to46.9%.

关 键 词：致密砂岩气田 开发井网 井网优化 泄流半径 水平井 采收率 苏里格气田 鄂尔多斯盆地 

分 类 号：TE324[石油与天然气工程—油气田开发工程]