黑龙江科技大学学报2024，Vol.34Issue(4)：523-530,8.DOI:10.3969/j.issn.2095-7262.2024.04.005
基于注入/压降试井的煤层气井产能分析
Productivity analysis of coalbed methane wells based on injection/pressure drop test
陈明 1冯鑫 1王大猛 1孙俊义 1余莉珠 1李红柱2
作者信息
- 1. 中石油煤层气有限责任公司临汾采气管理区,山西 临汾,041000
- 2. 中国煤炭地质总局第一勘探局地质勘查院,河北 邯郸,056001
- 折叠
摘要
Abstract
This paper is aimed at addressing the problems of big different production in single well and more low-producing wells in some CBM blocks.The study drawing on the case of 9 production wells of shallow coalbed methane in Daning-Jixian block analyzes the well test interpretation between the high-yield wells low-yield wells by the injection pressure drop test.The results show that the high-yield wells exhibts the high gas pressure,low formation pressure,high permeability and obvious fracture characteris-tics,and the low-yield wells have high formation pressure,low permeability and unobvious fracture char-acteristics.In the circumstances of the similar geological conditions and the same drainage system,the single well production is mainly affected by drilling and fracturing engineering factors.By introducing the concept of dynamic pd value,namely desorption interval,the low single well production is mainly caused by low pd value(less than 1 MPa),small desorption interval and poor reservoir physical properties.The production increases from 200-400 m3/d upto 1000 m3/d after the secondary reservoir renovation of the wells.关键词
煤层气/生产井/注入压降测试/低产原因分析/动态pd值Key words
coalbed methane/production wells/injection/fall well test/low production cause anal-ysis/dynamic pd value分类
能源科技引用本文复制引用
陈明,冯鑫,王大猛,孙俊义,余莉珠,李红柱..基于注入/压降试井的煤层气井产能分析[J].黑龙江科技大学学报,2024,34(4):523-530,8.
