地质与勘探2025，Vol.61Issue(2)：407-419,13.DOI:10.12134/j.dzykt.2025.02.016
新疆地区不同产水程度煤层气井排采动态与产能特征
Drainage Performance and Productivity Characteristics of Coalbed Methane Wells with Different Water Production Levels in Xinjiang
摘要
Abstract
Hydrogeology exerts a major effect on the enrichment and productivity of coalbed methane(CBM).In view of the productivity difference in CBM wells with different water production levels in Xinjiang,this work conducted statistical analysis and numerical simulation to divide the CBM wells into three types,i.e.,low water-producing,medium water-producing and high water-producing CBM wells.Those wells with an average daily water production of<5 m3 for 500 days were classified as low water-producing wells.This type of wells has a moderate pressure drop(the pressure drop of the well CS18 is 51.56%),a limited range of pressure degradation and absorption,and the gas supply area is small.The CBM wells with an average daily water production of 5～10 m3 are divided into medium water-producing wells.These wells have a moderate pressure drop(the pressure drop of the well BCS-22 is 53.67%),and rarely encounter the situation that the water production is too large to be desorbed by long-term drainage.CBM wells with an average daily water production of more than 10 m3 are classified as high-yield wells.The pressure drop of such wells is small(the pressure drop of wells T1-6 is 30.42%),and the drainage and pressure reduction are difficult.Further suggestions were put forward for the CDM wells,including"reasonable water control and appropriate pressure holding"for low water-producing wells,"continuous production and stable water and pressure"for medium water-producing wells,and"daily decrease in low casing pressure and high flow pressure"for high water-producing wells.This study can provide a basis for the long-term and efficient development of CBM wells with different water production levels in Xinjiang.关键词
煤层气/储层排采/产水量/井底流压/排采制度/新疆Key words
coalbed methane/reservoir drainage/water production/bottomhole flow pressure/drainage system/Xinjinag分类
石油、天然气工程引用本文复制引用
陈文圆,苏红梅,葛燕燕,孔庆虎,杨曙光,李鑫,张娜,韦波,王刚,王兴刚..新疆地区不同产水程度煤层气井排采动态与产能特征[J].地质与勘探,2025,61(2):407-419,13.基金项目
国家自然科学基金项目(编号:42062012)、国家科技重大专项(编号:2024ZD14060000)、新疆维吾尔自治区重点研发计划(编号:2024B01017-2)和新疆维吾尔自治区天山英才项目(编号:2023TSYCLJ0005、2022TSYCLJ0021)联合资助. （编号:42062012）
