天然气地球科学

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鄂尔多斯盆地苏里格气田西区气水层识别及产水井排查

方建龙,孟德伟,何东博,冀光,位云生   

  1. 1.中国石油勘探与生产公司,北京 100007;2.西南石油大学,四川 成都 610500;
    3.中国石油勘探开发研究院,北京 100083
  • 收稿日期:2015-03-04 修回日期:2015-10-11 出版日期:2015-12-10 发布日期:2015-12-10
  • 作者简介:方建龙(1977-),男,甘肃酒泉人,高级工程师,在读博士,主要从事天然气开发技术研究、管理工作. E-mail:fangjianlong@petrochina.com.cn.
  • 基金资助:

    国家科技重大专项项目“大型油气田及煤层气开发”(编号:2011ZX05015)资助.

Gas and Water Formation Recognition and Water Producing Well Investigation in the Western Sulige Gasfield,Ordos Basin

FANG Jian-long,MENG De-wei,HE Dong-bo,JI Guang,WEI Yun-sheng   

  1. 1.Petrochina Exploration and Production Company,Beijing 100007,China;2.Southwest Petroleum University,
    Chengdu 610500,China;3.PetroChina Research Institute of Petroleum Exploration & Development,Beijing 100083,China
  • Received:2015-03-04 Revised:2015-10-11 Online:2015-12-10 Published:2015-12-10

摘要:

苏里格气田西区含水层大面积分布,储层气水关系复杂,气水层识别困难,生产井多数产水,严重影响气井正常生产及区块整体产能评价部署。以气藏储层基本地质特征为基础,分析储层四性关系,分别建立盒8段、山1段孔隙度、渗透率及含水饱和度参数解释模型并进行模型可靠性验证。进而采用试气交会图方法确定声波、电阻率等主要曲线下限及孔隙度、渗透率、含水饱和度等物性下限,形成苏里格气田西区盒8段和山1段主力储层气水层识别标准,其中气层下限为孔隙度≥5%,渗透率≥0.1×10-3μm2,含水饱和度≤50%,声波时差≥213μs/m,电阻率≥60Ω·m,密度≤2.56g/cm3,泥质含量≤20%。将标准应用于后续开发井气水层识别并与试气成果对比分析,证实标准可靠。同时,针对不同生产阶段、不同生产特征气井提出了试气、试采、探液面测试、气液两相计量试验及生产特征分析5种气井产水、积液的排查方法,明确产水对气井生产的影响,形成产水井排查标准并对受不同程度影响的气井提出措施建议,为气井及区块开发评价提供参考。

关键词: 鄂尔多斯盆地, 苏里格气田西区, 气水层, 识别标准, 产水井, 排查方法

Abstract:

The western Sulige Gasfield is characterized by a wide range of water,complex gas-water relationship,difficult recognition of gas and water formation,and almost all wells produce water,which seriously affect the normal production of gas well and the overall capacity evaluation and deployment of blocks.Based on the basic geological characteristics of gas reservoir,four property relationships was analyzed,and porosity,permeability and water saturation model of He8 and Shan1were established and certificated respectively.Then intersection chart method was adopted to determine the lower limit of main log curves and property parameters,such as acoustic curve,resistivity curve,porosity,permeability and water saturation.At last,gas and water formation recognition standard of H8 & S1 reservoirs in western Sulige Gasfield was summarized,in which the gas formation should meet the conditions of porosity≥5%,permeality≥0.1×10-3μm2,water saturation≤50%,acoustic time≥213ms/m,resistivity≥60Ω·m,density≤2.56g/cm and shale content≤20%.After the standard was applied to gas and water formation recognition of follow-up development gas wells,and also compared with testing results,it is confirmed that the standard is reliable.Meanwhile,according to the different production stage and different characteristics of gas well,five different methods were extracted for investigating water production and liquid loading,such as gas testing,producing test,liquid level checking,gas-liquid measurement test and production characteristics,of which influences degree of water can be obtained.Corresponding to five methods,standard of water production wells investigation formed and countermeasures to gas wells affected by water in different degree were suggested,which can provide reference for the development and evaluation of gas Wells and blocks.

Key words: Ordos Basin, Western Sulige Gasfield, Gas and water formation, Recognition standard, Water producing wells, Investigating methods

中图分类号: 

  • TE311

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