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应力敏感对致密压裂气井生产的影响
罗瑞兰1,2, 雷群1, 范继武3, 廖红梅3, 王哲3
1.中国石油勘探开发研究院,北京 100086;2.中国石油勘探开发研究院廊坊分院,河北 廊坊 065007;3.中国石油长庆油田公司 苏里格研究中心,陕西 西安 710018
摘要:
以苏里格气田为例,通过室内实验、气井生产动态分析、气藏数值模拟方法,综合研究了基质和人工压裂裂缝的应力敏感性对致密压裂气井生产造成的影响。研究表明:充填/加砂裂缝具有较强的应力敏感性,气井压裂裂缝的有效缝长和导流能力在生产早期(一年左右)会下降50%以上;随着气井配产提高,应力敏感对生产的影响增强,最大能使气井的最终采气量降低18%,这其中压裂裂缝的应力敏感性起着重要作用。
关键词:  应力敏感  致密气藏  压裂气井  苏里格气田
DOI:10.11835/j.issn.1000-582X.2011.04.018
分类号:
基金项目:国家科技重大专项资助项目(2008ZX05013-003);中国石油勘探开发研究院青年创新基金资助项目
The influence of stress sensitivity on productionof hydraulically-fractured tight gas wells
LUO Rui-lan1,2, LEI Qun1, FAN Ji-wu3, LIAO Hong-mei3, WANG Zhe3
1.Petroleum Exploration and Development Research Institute,PetroChina,Beijing 100086,P.R.China;2.Langfang Branch,Petroleum Exploration and Development Research Institute,PetroChina,Langfang 065007,He bei,P.R.China;3.Sulige Research Center,Changqing Oil field Company,PetroChina,Xian 710018,Shanxi,P.R.China
Abstract:
This paper takes Sulige Gas Field as a case study and used three methods including laboratory experiments,production performance analysis and reservoir simulation to study the influence of stress sensitivity on production of fractured tight gas wells.The results show that the fracture length and conductivity of hydraulically created fracture are reduced more than 50%,and the stress sensitivity of hydraulically created fracture is stronger than that of matrix.With the increase of gas production,the influence of stress sensitivity becomes stronger,and finally results in 18% reduction of gas production,and hydraulically created fractures play an important role in the influence of stress sensitivity.
Key words:  stress sensitivity  tight sandstone gas  fractured gas well  Sulige gas field
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