东海低渗储层气井产水来源综合判别方法
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摘要
随着东海油气田勘探开发力度的进一步加大,一些低渗透气田也陆续投入了开发,与常规的中高渗气田不同,部分位于低渗储层的气井缺乏无水采气期,在投产初期即出现了不同程度的产水现象。为了明确气井的产水类型,为后续开发技术政策的调整提供技术指导,研究建立了低渗储层气井产水来源的综合判别方法,对东海一在产低渗气田的产水类型进行了分析。研究表明:低渗储层可能分布范围较广的气水过渡带,位于其中的气井投产后会有可动水产出,通过合理调整配产,可有效延缓井筒积液,保障气田平稳生产。
With the further development of oil-gas fields in the East China Sea,some low permeability gas fields have been developed. Differing from the conventional high permeability gas fields,some gas wells in low permeability reservoirs begin to produce water at the beginning of the production and lack of waterless gas recovery period. In order to clarify the producing water type of gas wells and provide technical guidance for the adjustment of subsequent development technical policies,a comprehensive discrimination method for the source of producing water in gas wells of low permeability reservoirs was established. The study showed that there might be a wide range of gas-water transition zone in the low-permeability reservoir,in which a certain amount of movable water will be produced after the gas well is put into production. By reasonable production allocation,the liquid loading in the wellbore can be effectively delayed to ensure the stable production of the gas field.
With the further development of oil-gas fields in the East China Sea,some low permeability gas fields have been developed. Differing from the conventional high permeability gas fields,some gas wells in low permeability reservoirs begin to produce water at the beginning of the production and lack of waterless gas recovery period. In order to clarify the producing water type of gas wells and provide technical guidance for the adjustment of subsequent development technical policies,a comprehensive discrimination method for the source of producing water in gas wells of low permeability reservoirs was established. The study showed that there might be a wide range of gas-water transition zone in the low-permeability reservoir,in which a certain amount of movable water will be produced after the gas well is put into production. By reasonable production allocation,the liquid loading in the wellbore can be effectively delayed to ensure the stable production of the gas field.
引文
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[2]廖意.涩北气田气井出水分析及对策研究[D].长江大学,2012.
[3]邓勇,杜志敏,陈朝晖.涩北气田疏松砂岩气藏出水规律研究[J].石油天然气学报,2008(2):336-338.
[4]孙虎法,王小鲁,成艳春,等.水源识别技术在涩北气田气井出水中的应用[J].天然气工业,2009,29(7):76-78+140-141.
[5]朱文娟,杨志兴,黄导武,等.西湖凹陷低渗储层水的赋存状态及出水特征研究[J].石油地质与工程,2017,31(2):91-93+133.
[6]李锦,王新海,朱黎鹞,等.气藏产水来源综合判别方法研究[J].天然气地球科学,2012,23(6):1185-1190.
[7]姚园. M气田主力气藏出水分析及治水对策研究[D].西南石油大学,2015.
[8]何更生,唐海.油层物理[M].北京:石油工业出版社,2011:175-176.
[9]黄东杰,杨宇,伊向艺,等.子洲气田山_2段单井出水机理研究[J].新疆石油天然气,2010,6(3):46-48+53+115.
[10]李晓平,刘启国,孙万里,等.气井凝析液量研究[J].钻采工艺,2001,24(6):38-40+5.
[11]MCKETTAJJ,WEHE A H. Use the chart of water content of natural gas[J]. Pet Ref,1958(8):153-154.
[12]刘能强.实用现代试井解释方法[M].北京:石油工业出版社,2008:149.
[13]李爱芬.油层物理[M].东营:中国石油大学出版社,2011:284.