沁水盆地南部高煤阶煤层气高效开发对策与实践

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中文摘要：我国高煤阶煤层气资源丰富,其高效开发利用的能源、安全、生态意义十分突出.以沁水盆地南部高煤阶煤层气开发实践为例,系统分析了早期开发过程中面临的5个主要问题及挑战:高煤阶煤层气开发理论不完善;有利区选择精度低;储层改造技术适应性不强;排采控制制度效率低、效益差;集输系统呈现"三难""三高".中国石油华北油田公司坚持问题导向、目标引领,室内研究与现场实践相结合,形成了高煤阶煤层气高效开发的新理念及关键技术对策:提出高煤阶煤层气疏导开发理念,构建套管单支水平井+分段压裂的煤层气开发方式;建立高产有利区优选技术,实现建产模式由大面积整体建设向精准建产选区转变;完善升级煤层气压裂改造技术,实现储层改造向构建多级有效缝网转变;创新疏导排采控制技术,实现排采控制向优快高效转变;建立低压环状地面集输技术,实现地面集输建设模式向高效益转变.经实践,平均新建产能到位率由37％提升至84％以上,平均单井日产气提高为原来的1.6倍,达产时间缩短20％以上,新建项目地面建设投资降低20％.沁水盆地不同储层类型煤层气开发均取得产量突破,沁水盆地南部煤层气田年生产能力突破21 × 108m3,建成我国最大的煤层气田,有力助推了我国煤层气的战略性发展.

外文标题：Strategy and practice of high-efficiency development of high-rank coalbed methane in the southern Qinshui Basin

外文摘要：There are abundant high-rank coalbed methane resources in China,and the high-efficiency development is of great energy,security,and ecological significances.Taking the development practice of high-rank coalbed methane in southern Qinshui Basin as an example,five main problems and challenges in the early development process are systematically analyzed:(1)A lack of advanced theory for the development of high-rank coalbed methane;(2)Low accuracy of favorable area selection;(3)Insufficient adaptability of reservoir reconstruction technology;(4)Low efficiency and poor benefit of drainage-production control regime;(5)"Three difficulties"and"three highs"of the gathering and transportation system.PetroChina Huabei Oilfield Company has adhered to problem-oriented and target-oriented approach and integrated indoor research and field practice,forming a new concept and key technologies for the high-efficiency development of high-rank coalbed methane,which include a drainage development concept,and a development mode of single-lateral horizontal well casing+multi-stage fracturing;The technology for optimal selection of high-yield favorable areas has been researched,achieving the transformation from large-area overall production capacity construction to precise construction mode in the favorable area;The fracturing and reservoir stimulation technology for coalbed methane has been improved and updated,which supports to form multi-level effective fracture network;The optimal,fast and high-efficiency drainage-production control technology has been innovated;The low-pressure ring surface gathering and transportation technology has been developed to achieve high benefits.The field practice shows that the success rate of new constructed production capacity has increased from 37％to higher than 84％,the average daily gas production of a single well has increased by 1.6 times,the time reaching target production has decreased by more than 20％,and the cost of surface construction investment for new projects has reduced by 20％.In addition,the coalbed methane production breakthrough has been achieved in all types of reservoirs in Qinshui Basin,with an annual production capacity of 21×108m3 in coalbed methane field in the southern Qinshui Basin,which is it the largest coalbed methane field in China,greatly boosting the strategic development of coalbed methane.

外文关键词：

Qinshui Basinhigh-rank coalbed methanehigh-efficiency developmentdrainage development conceptoptimal selection of capacity construction areafracturing reconstructiondrainage-production controllow-pressure ring gathering and transportation

作者：

杨延辉、王玉婷、刘忠、陈必武、吴春升、张学英、董晴

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作者单位：

中国石油华北油田公司

中国石油天然气集团有限公司煤层气开采先导试验基地

中国石油华北油田公司勘探开发研究院

中国地质大学(武汉)

中国石油华北油田山西煤层气勘探开发分公司

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关键词：

沁水盆地高煤阶煤层气高效开发疏导开发理念精准建产区优选压裂改造排采控制低压环状集输

基金：

国家科技重大专项中国石油天然气股份有限公司前瞻性、基础性技术攻关项目

项目编号：

2017ZX050642021DJ2301

出版年：

2024

DOI：

10.3969/j.issn.1672-7703.2024.04.002

中国石油勘探

石油工业出版社有限公司

中国石油勘探

CSTPCD北大核心

影响因子：3.036

ISSN：1672-7703

年,卷(期)：2024.29(4)