水驱气藏气井见水风险评价新方法  

New method of aquifer influx risk classification for wells in gas reservoir with aquifer support

作　　者：李勇[1] 张晶[1] 李保柱[1] 夏静[1] 郭凯[2] 胡云鹏[1] 王代刚[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油天然气股份有限公司天然气与管道分公司,北京100007

出　　处：《天然气地球科学》2016年第1期128-133,共6页Natural Gas Geoscience

基　　金：国家科技重大专项项目"高压气藏高效安全开发技术研究"(编号:2011ZX05015-002)资助

摘　　要：在边底水能量较强的气藏开发中,如何综合动静态参数定量评价单井见水的风险等级,从而对见水井做出准确的预警是一个亟待解决的问题。针对该问题,提出了一套系统的单井见水风险定量评价的方法。首先建立了一套影响气井见水的动静态参数评价指标体系,然后应用层次分析和模糊综合评判对气井见水风险等级进行分类评价,最后通过灰色综合评价方法对气井见水顺序做出准确定量预测。以塔里木盆地克拉2大型异常高压有水气田为例,阐述了如何使用该评价体系进行定量水侵风险评价,将所有气井按见水风险等级划分为4类,确定了气井的见水顺序,现场实际气井生产动态资料验证了方法的可靠性。该方法为水驱气藏产量调配提供了依据,有效保证了气田平稳高效开发。During the development of gas reservoirs with strong bottom or edge aquifer support,how to quantitatively evaluate the risk of water breakthrough comprehensively considering the variety of dynamic and static parameters and make early warning for the wells which the water coning will break through are urgent problems to be solved.Currently,the published literatures on these questions are relatively one-sided.Aiming at the questions mentioned above,firstly,the evaluation index system of static and dynamic parameters associated with water breakthrough in gas reservoirs is established.Then based on the index system,the paper used analytic hierarchy process and fuzzy evaluation to evaluate the risk of water breakthrough.And finally water breakthrough sequence of gas wells can be quantitatively evaluated.The paper took Kela2 abnormal high pressure gas reservoir with bottom and edge aquifer drive for example to illustrate how to use the method to evaluate aquifer influx risk of all gas wells.And all gas wells are classified into 4 types based on the risks of aquifer influx,and water breakthrough sequence of all wells are also determined.Actual gas well performances validate this new method.Furthermore,the evaluation results are very useful for well production rate optimization and gas field effective development.

关 键 词：水驱气藏 见水风险 模糊评判 评价体系 

分 类 号：TE331.1[石油与天然气工程—油气田开发工程]