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万玉金(1968-),男,内蒙古赤峰人,教授级高级工程师,博士,主要从事天然气开发评价及气田开发方案编制工作. E-mail: wanyj69@petrochina.com.cn. |
收稿日期: 2020-08-18
修回日期: 2020-11-01
网络出版日期: 2021-03-10
Well deployment strategy and enlightenment of Haynesville shale gas play
Received date: 2020-08-18
Revised date: 2020-11-01
Online published: 2021-03-10
Supported by
The China National Science & Technology Major Project(2016ZX05037-006)
井位优化部署是提高油气藏开发效果、降低开发风险、实现规模效益开发的重要环节。页岩气井达到峰值产量后即快速递减,由此需要大量、持续钻井才能满足气区上产或稳产需求,故不可能实现一次井网,主要采用优选有利区、滚动建产方式。以美国第三大页岩气产区Haynesville为例,通过窗口分析技术深入剖析2008—2017年约3 500口气井的井位部署过程,总结井位部署与优化实施策略。研究发现:Haynesville页岩气产区开发历程划分为探索期、区域拓展期和成熟期3个阶段,不同时期采取不同的井位部署策略;同时每个窗口内并非 “地毯式”连续布井,而是通过早期分散式单井评价,后期滚动井组或单井建产的开发布井方式,降低开发风险。Haynesville页岩气开发井位部署与优化策略,对中国页岩气开发整体部署规划、分步实施策略以及风险管控具有一定的指导与借鉴作用。
万玉金 , 何畅 , 孙玉平 , 张晓伟 . Haynesville页岩气产区井位部署策略与启示[J]. 天然气地球科学, 2021 , 32(2) : 288 -297 . DOI: 10.11764/j.issn.1672-1926.2020.11.009
Well deployment optimization is an important link to improve reservoir development effect, reduce risk and realize economic benefits. For shale gas wells, the initial gas production is high but the decline is fast, which requires a large number of continuous drillings to meet the demand of production, so it is impossible to achieve primary well pattern, mainly deploying wells in the preferred favorable area and using rolling production strategy. Taking Haynesville, the third largest shale gas play in the United States, as an example, this paper analyzes the well deployment process of about 3 500 gas wells from 2008 to 2017 through window analysis technology, and summarizes the method of well deployment and optimization strategy. The study results show that the development of Haynesville shale gas play is divided into three stages: experimental stage, regional expansion stage and maturity stage, and different well deployment strategies are adopted in different stages. Meanwhile, in each window single well is evaluated dispersedly in the early stage and single well or well group is deployed in the later stage rather than a “carpet type” continuous well distribution mode to reduce risk. The well deployment and optimization strategy of Haynesville shale gas play has certain guidance and reference for shale gas overall deployment planning, step-by-step implementation strategy and risk management in China.
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