非常规天然气

延川南区块煤层气富集高产的地质控制作用

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  • 中国石油化工股份有限公司石油勘探开发研究院,北京 100083
陈刚(1980-),男,湖北钟祥人,高级工程师,博士,主要从事煤层气等非常规油气地质研究. E-mail:chenwyg@163.com.

收稿日期: 2016-03-16

  修回日期: 2016-08-12

  网络出版日期: 2019-09-09

基金资助

中国石化华东分公司科技项目(编号:34600000-15-ZC0613-0011)资助

Study on the geological controlling effects on the enrichmentand high-yield of coalbed methane in Yanchuannan area

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  • Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China

Received date: 2016-03-16

  Revised date: 2016-08-12

  Online published: 2019-09-09

摘要

鄂尔多斯盆地延川南区块是我国第一个商业开发的深部煤层气田,目前处于上产阶段。构造分异作用导致煤层气井产气产水差异显著。综合分析了岩心、测录井、产出水地球化学数据及排采井生产等资料,探讨了该区块煤层气富集高产的地质控制作用。根据研究结果,将区块划分为东、西2个水文地质单元,其中东部谭坪水文地质单元的水动力强度较西部万宝山区大。延川南区块山西组2号煤层水处于弱径流_滞流区,地层水矿化度高,适宜的水文地球化学参数分布区有利于煤层气的富集。基于煤体结构测井解释,发现碎裂煤发育区煤层气井易高产,建立了区块范围内煤层气富集高产选区参数指标体系,优选出4个有利区,为区块后续开发提供了接替区。

本文引用格式

陈刚, 胡宗全, 张永贵, 苏坤 . 延川南区块煤层气富集高产的地质控制作用[J]. 天然气地球科学, 2016 , 27(11) : 2093 -2102 . DOI: 10.11764/j.issn.1672-1926.2016.11.2093

Abstract

Yanchuannan block is China’s first commercial development of deep coalbed methane field in southeast Ordos Basin,and now in the stage of the production.Due to the different main burial depth of coal seams,there is significant difference between gas and water production in the gas fields.Using comprehensive analysis of the large number of well logging interpretation,taking the test of ground water geochemical and production wells working condition as a basis,we discuss the geological controlling effect on the enrichment and high-yield of coalbed methane in Yanchuannan block.It can be divided into east and west two hydrogeological units,and the hydrodynamic intensity in eastern Tanping is higher than that in the west Wanbaoshan block.High ground water salinity in the weak runoff-retention area of Yanchuannan,and suitable hydro-geochemical parameters were in favor of coalbed methane enrichment.Based on the analysis of well logging interpretation of coal structure,it is found that the high-yield area was distributed in the cataclastic structure coal development zone,therefore,selection criteria of coalbed methane enrichment and high-yielding have been established,in Yanchuannan area  and the four favorable area will provide backup relay area for the gas field of subsequent development.

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