中-低煤阶煤层气产能模式及其控制因素-以准南煤田阜康矿区为例
投稿时间:2018-05-30  修订日期:2018-11-15  点此下载全文
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作者单位E-mail
韩旭 新疆大学地质与矿业工程学院 hanxuboy@126.com 
田继军 新疆大学地质与矿业工程学院 tianjijun@xju.edu.cn 
杨曙光 新疆煤田地质局  
王海超 新疆大学地质与矿业工程学院  
基金项目:国家自然基金(41662010)
中文摘要:基于对阜康矿区煤层气井生产动态资料分析,对区内煤层气井进行了产能分级并总结出以下三个生产特征:①产水量大,排水期长;②产水降低,产气增高;③稳产期时间长。同时结合各煤层气井生产特征,建立了3种阜康矿区煤层气产能模式,并细分为6个亚类。对影响阜康矿区煤层气产量的地质因素及工程因素进行了重点研究,研究发现:地质因素中煤层气产量与煤层埋深呈正比,深度越大产量越大;而产气量与煤层厚度呈反比,分析认为与煤层非均质性及射孔范围有关;渗透率与产气量表现良好的线性正相关;工程因素中,多层合采,层间干扰严重;产气量与压裂输出排量呈正比,输出排量越大,产能越好。
中文关键词:准南煤田  阜康矿区  产能模式  生产特征  压裂
 
Productivity mode and control factors of middle-low rank coalbed methane wells:a case from Fukang Mining Area, Southern Junggar Coal-field
Abstract:Based on the analysis of the production dynamics of coalbed methane wells in the Fukang mining area, the CBM wells in the area were graded and the following three production features were summarized: the high water yield and long drainage period; lower water production and higher gas production;and the long stable production period. At the same time, in combination with the production characteristics of gas wells in each coal seam, three types of coalbed methane production models were established in the Fukang mining area and subdivided into six subcategories. The key researches on the geological and engineering factors that affect the coalbed methane production in the Fukang mining area have been conducted. Findings: In geological factors, the coalbed methane production is proportional to the depth of the coal seam, and the greater the depth, the greater the yield; the gas production is inversely proportional to the thickness of the coal seam, and the analysis considers that it is related to the heterogeneity and perforation range of the coal seam; a positive linear correlation between permeability and gas production performance; Among the engineering factors, multiple layers are combined and the inter-layer interference is serious; the gas production volume is proportional to the fracturing output, and the larger the output, the better the production capacity.
keywords:zhunnan coal-field  fukang mining area  productivity mode  production characteristics  fracturing
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