沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素

doi:10.11743/ogg20180215

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (2): 366-372.doi: 10.11743/ogg20180215

沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素

王勃¹, 姚红星², 王红娜³, 赵洋^4,5, 李梦溪², 胡秋嘉², 樊梅荣², 杨春莉²

1. 国家安全生产监督管理总局信息研究院, 北京, 100029;
2. 中国石油华北油田分公司, 河北任丘 062550;
3. 中国石油东方地球物理勘探有限责任公司, 河北涿州, 072750;
4. 中国矿业大学, 江苏徐州, 221116;
5. 中国石油集团科学技术研究院有限公司, 河北廊坊 065007

收稿日期:2017-07-04 修回日期:2017-12-18 出版日期:2018-04-28 发布日期:2018-05-16
第一作者简介:王勃(1979-),男,博士、高级工程师,煤层气勘探开发。E-mail:wangbo1230038@163.com。
基金项目:
中国石油天然气集团公司“九五”重点科技攻关项目（970211）。

Favorable and major geological controlling factors for coalbed methane accumulation and high production in the Chengzhuang Block,Qinshui Baisn

Wang Bo¹, Yao Hongxing², Wang Hongna³, Zhao Yang^4,5, Li Mengxi², Hu Qiujia², Fan Meirong², Yang Chunli²

1. National Institute for Occupational Safety, Beijing 100029, China;
2. Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062550, China;
3. Bureau of Geophysics Prospecting Inc., PetroChina, Zhuozhou, Hebei 072750, China;
4. China University of Mining & Technology, Xuzhou, Jiangsu 221116, China;
5. Science and Technology Research Institute Ltd., PetroChina, Langfang, Hebei 065007, China

Received:2017-07-04 Revised:2017-12-18 Online:2018-04-28 Published:2018-05-16

摘要/Abstract

摘要： 成庄区块是沁水盆地煤层气开发最为成功的区块之一。为了指导相似地质条件的煤层气区块的勘探开发，基于大量的勘探开发实践数据，利用数理统计、室内实验、测井解释、构造解析、数值模拟及递减分析等方法，系统开展了该区块煤层气成因、成藏条件及产气规律等方面的研究。研究表明：该区具备构造简单、煤层展布稳定、埋藏深度浅、有机热成因气、含气量高、渗透率高等优越的成藏条件；该区高产井比例高（占总井数47%），具有单井平均产量高（介于4 000~7 000 m³/d）、采收率高（预计采收率为55.1%）等产气特征。进一步分析了富集、高产主控因素的控气作用机理，结果认为：构造热事件提高生气能力，改善了物性，封盖条件与水动力优势配置，利于煤层气富集；张性水平应力分布区及煤矿卸压应力释放区的煤储层渗透率高，利于储层高产。

关键词: 采收率, 煤层气, 成庄区块, 沁水盆地

Abstract: As one of the most successful blocks of coalbed methane (CBM) development in Qinshui Basin,the exploration and development in Chengzhuang coal block can provide useful guidance for the development of other CBM blocks with geologically similar backgrounds.In combination of plenty of practical data on exploration and development and methods such as mathematical statistics,laboratory experiment,wire line logging interpretation,structure analysis,numerical modeling,decline analysis,we analyzed the genetic mechanism,accumulation conditions of CBM,and patterns of gas production,in the Chengzhuang Block.The study indicates that:(1) the Chengzhuang Block is characterized by favorable accumulation conditions with its simple structure,extensive reservoir distribution,shallow burial depth of coal reservoir,organic thermogenic gas,high gas content and high permeability;(2) the high productivity wells account for 47% of the total wells of the block,with high average production of 4 000~7 000 m³/d per well and high expected recovery of 55.1%.Furthermore,we analyzed the controlling mechanisms for CBM gas accumulation and high production,and concluded that (1) the tectonic thermal events would boost gas generation,reservoir quality,seal-capping capacity and optimal distribution of hydrodynamic force,which would be beneficial for CBM accumulation;(2) the coal reservoirs with horizontal extensional stress and in the coal mine pressure relief zone are of high permeability,favorable for CBM production.

Key words: recovery, CBM, Chengzhuang Block, Qinshui Basin

中图分类号:

TE122.3

王勃,姚红星,王红娜,等. 沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素[J]. 石油与天然气地质, 2018, 39(2): 366-372. doi: 10.11743/ogg20180215 Wang Bo,Yao Hongxing,Wang Hongna,et al. Favorable and major geological controlling factors for coalbed methane accumulation and high production in the Chengzhuang Block,Qinshui Baisn[J]. Oil & Gas Geology, 2018, 39(2): 366-372. doi: 10.11743/ogg20180215

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沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素

Favorable and major geological controlling factors for coalbed methane accumulation and high production in the Chengzhuang Block,Qinshui Baisn

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