准南阜康矿区低煤化烟煤高温高压吸附实验及深部吸附气含量预测  

High-temperature and high-pressure adsorption experiment and deep adsorbed gas content prediction of low coal bituminous coal in Fukang mining area of south Junggar basin

作　　者：殷珂 傅雪海[1,2] 陈峰 王一兵[3] YIN Ke;FU Xuehai;CHEN Feng;WANG Yibing(Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process (Ministry of Education), China University of Mining & Technology, Xuzhou, Jiangsu 221116, China;National Center for Quality Supervision and Inspection of CBM Products (Shanxi), Jincheng, Shanxi 048000, China;Xinjiang Cleanseed Energy Company Limited, Urumqi 830000, China)

机构地区：[1]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221116 [2]国家煤层气产品质量监督检验中心(山西),山西晋城048000 [3]新疆科林思德新能源有限责任公司,乌鲁木齐830000

出　　处：《中国科技论文》2022年第1期72-77,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(41772158);国家科技重大专项(2016ZX05043-004-005)。

摘　　要：为揭示准南阜康矿区深部煤层吸附特性和吸附气含量,对5件低煤化烟煤进行高温高压吸附实验,分析温度、压力和煤阶对深部煤储层吸附性的影响;基于非线性回归分析方法,建立深部吸附气量预测模型,并结合研究区煤储层煤质特征及温度、压力变化规律,对深部煤储层吸附气量进行预测。结果表明:准南低煤化烟煤在相同温度条件下的Langmuir体积与R_(o,max)呈正相关关系,Langmuir压力与R_(o,max)呈负相关关系,相同煤阶条件下的Langmuir体积与温度呈负相关关系,Langmuir压力与温度呈正相关关系;阜康矿区低煤化烟煤储层埋深为400~3000 m的空气干燥基饱和吸附气量为3.85~11.25 m^(3)/t,并随埋深的增加呈现出快速增加—缓慢增加—缓慢减小的趋势;研究区R_(o,max)为0.62%~0.71%的煤储层吸附气量临界深度为1700~2100 m,并随R_(o,max)的增大而变浅,临界深度以浅压力对吸附的正效应大于温度的负效应,之后温度对吸附性的负效应大于压力的正效应。To reveal the adsorption characteristics and adsorbed gas content of deep coal seams in the Fukang mining area,the high temperature,and high pressure adsorption experiments were carried out on five low coal bituminous coals,and the effects of temperature,pressure,and coal rank on the adsorption of deep coal reservoirs were analyzed.Based on the nonlinear regression analysis method,a prediction model of the deep adsorbed gas volume was established.Combined with the coal quality characteristics,temperature,and pressure change rules of the coal reservoir in the study area,the adsorption gas content of the deep coal reservoir was predicted.The results show that the Langmuir volume is positively correlated with R_(o,max) while Langmuir pressure is negatively correlated with R_(o,max) at the same temperature condition,and the Langmuir volume is negatively correlated with the temperature while the Langmuir pressure is positively correlated with the temperature at the same coal rank condition.The saturated adsorbed gas content of the air drying basis which was buried depth of 400-3000 m in the Fukang mining area is between 3.85-11.25 m^(3)/t,which shows a trend of rapid increase-slow decrease with the increase of burial depth.In the study area,R_(o,max) is between 0.62%-0.71%,and the critical depth of adsorption gas content of the coal reservoir is between 1700-2100 m,which becomes shallower with the increase of R_(o,max).The positive effect of pressure on adsorption is greater than the negative effect of temperature in the region shallower than the critical depth while the negative effect of temperature on the adsorption is greater than the positive effect of pressure in the region deeper than the critical depth.

关 键 词：煤层气 吸附性 吸附气含量 预测 深部 

分 类 号：P618.13[天文地球—矿床学]