苏里格气田致密气井产能主控因素分析  

Analysis of Production Capacity Control Factors of Low-permeability Tight Gas Reservoir

作　　者：吴则鑫 Wu Zexin(Geology Institute,CNPC Greatwall Drilling Company Ltd.,Panjin,Liaoning 124010,China)

机构地区：[1]中石油长城钻探工程公司地质研究院,辽宁盘锦124010

出　　处：《非常规油气》2018年第5期62-67,共6页Unconventional Oil & Gas

基　　金："十三五"国家科技重大专项"大型油气田及煤层气开发"(2017ZX05035);中国石油天然气集团公司工程技术科技统筹项目"自营区块增产综合技术研究与试验"(2017T-004-001)联合资助

摘　　要：苏里格气田发育典型"四低"岩性气藏,自然产能井很少,气井获得高产需要规模压裂来实现。本文从气井产能模型出发,分析控制气井产能的理论因素,并以苏X区块生产实际为例,分析影响气井产能的地质因素和工程因素。研究表明:气井产能与地层系数、储能系数成正相关关系,在水平段长度1 000～1 200m,有效储层钻遇率60%,压裂段数6段,裂缝长120m,裂缝导流能力为100mD·m时,气井可达到较好的经济产能;对于水平井而言,有效厚度大于13m,含气饱和度大于56.5%,单控储量大于1.42×108 m3时,水平井累产气可达到1×108 m3。通过以上认识,对地质选井和气井储层改造具有较好的现实指导意义。The Sulige gas field is characterized in the typical “four low” lithologic gas reservoirs, with few natural capacity wells. Large-scale gas fracturing is essential to achieve high yield. Based on the fracturing gas well productivity model, this paper analyzed the theoretical factors that control the gas well productivity, and analyzed the geological and engineering factors that affect the productivity of the gas well with the actual production of the block Su-X as an example. The results showed that： Gas well productivity is positively correlated with formation coefficient （ KH ） and energy storage coefficient （ hφSg ）. When the horizontal section is 1 000-1 200 m long, the effective drilling rate of reservoirs is 60%, the number of fracture sections is six, the crack length is 120 m, and the fracture flow conductivity is 100 mD·m, the gas well can achieve better economic productivity. For horizontal Wells, when the effective thickness is greater than 13 m, the gas saturation will be greater than 56.5%, and the single controlled reserves will be greater than 142 million m 3 , the cumulative gas production of horizontal wells can reach 100 million m 3 . The analysis has a good realistic guiding significance for geological well selection and gas well reservoir reconstruction.

关 键 词：苏里格气田 压裂气井 产能 控制因素 改造体积 

分 类 号：TE328[石油与天然气工程—油气田开发工程]