平顶山东部矿区煤系气资源量估算及有利开发层段预测  

Estimation of coal measure gas resources and prediction of favorable development intervals in eastern Pingdingshan mining area

作　　者：李延河[1,2] 倪小明 王保玉[3,4] 赵锦程[3,4,6] LI Yanhe;NI Xiaoming;WANG Baoyu;ZHAO Jincheng(Pingdingshan Tian’an Coal Industry Co.,Ltd.,Pingdingshan 467099,China;China Pingmei Shenma Group Co.,Ltd.,Pingdingshan 467099,China;Institute of Efficient Development and Utilization of Coal Gas Resources,Henan Polytechnic University,Jiaozuo 454003,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Jiaozuo 454003,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Resources and Environment,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]平顶山天安煤业股份有限公司,河南平顶山467099 [2]中国平煤神马集团有限责任公司,河南平顶山467099 [3]河南理工大学煤系气资源高效开发利用研究院,河南焦作454003 [4]河南理工大学煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454003 [5]河南理工大学能源科学与工程学院,河南焦作454003 [6]河南理工大学资源环境学院,河南焦作454003

出　　处：《大庆石油地质与开发》2025年第2期147-155,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“不同煤体结构组合水力压裂裂缝扩展演化特征与起裂选择联动效应”(41872189)。

摘　　要：近年的勘探开发实践已经证实平顶山矿区煤系气资源潜力巨大,但煤系气富集规律不清、有利区分布不明的问题制约了平顶山矿区煤系气勘探开发的快速推进。以平顶山东部矿区为例,从煤系气赋存地质条件、煤储层物性特征出发,剖析煤系气富集特征,提出有利层段优选模型。结果表明:二1煤层和四2煤层的平均实测含气量分别为12.36和9.77 m^(3)/t,平均含气量梯度分别为2.56和1.60 m^(3)/(t·hm);二煤段、三煤段和四煤段的平均实测全烃值分别为0.39%、1.04%和0.85%,含煤岩系的含气量随全烃值的增加呈线性增大;平顶山东部矿区的煤系气总资源量为214.20×10^(8) m^(3),资源丰度为2.15×10^(8) m^(3)/km^(2);在区域分布上,首山一矿煤系气的总资源量最高,平煤八矿和十三矿中等,平煤十矿较低;垂向上,二煤段煤系气总资源量最高,四煤段次之,三煤段最小;研究区的有利指数为0.005~0.475,平均为0.172,煤系气开发有利层段3个,较有利层段5个,不利层段4个;区域上的优先开发顺序依次为首山一矿、平煤十矿、平煤十三矿和平煤八矿,垂向上的优先开发层段依次为二煤段、四煤段和三煤段。研究成果可为平顶山东部矿区煤系气有利开发层段的优选提供地质依据。Exploration and development in recent years have confirmed enormous potential of coal measure gas re-sources in Pingdingshan mining area.However,less understanding on enrichment law of coal measure gas and dis-tribution of favorable areas hinder the rapid advance of coal measure gas exploration and development in Pingding-shan mining area.Taking eastern Pingdingshan mining area as an example and starting from geological conditions of coal measure gas occurrence and physical properties of coal reservoirs,enrichment characteristics of coal measure gas are analyzed to propose a model for optimizing favorable intervals.The results show that,average measured gas contents of coalbedsⅡ1 andⅣ2 are 12.36 and 9.77 m^(3)/t,respectively,with average gas content gradients of 2.56 and 1.60 m^(3)/(t·hm),respectively.Average measured total hydrocarbon values of coal intervalsⅡ,ⅢandⅣare 0.39%,1.04%and 0.85%,respectively,with gas content of coal-bearing series increases linearly with the increase of total hydrocarbon value.Total coal measure gas resources in eastern Pingdingshan mining area is 214.20×10^(8) m^(3),with abundance of 2.15×10^(8) m^(3)/km^(2).Regional distribution shows the most total coal measure gas resources in Shoushan No.1 Mine,medium in Pingmei No.8 Mine and Pingmei No.13 Mine,and less in Pingmei No.10 Mine.Vertical distribution shows the most total coal measure gas resources in coal intervalⅡ,followed by coal intervalⅣ,and the least in coal intervalⅢ.Favorability index of studied area is 0.005~0.475,with average of 0.172.There are 3 more favorable intervals,5 favorable intervals and 4 unfavorable intervals for coal measure gas development.Regional priority for development is orderly Shoushan No.1 Mine,Pingmei No.10 Mine,Pingmei No.13 Mine and Pingmei No.8 Mine.Vertical priority for development is orderly coal intervalⅡ,coal intervalⅣand coal intervalⅢ.The research provides geological basis for favorable intervals optimization of coal measures gas development in eastern Pingdingshan mini

关 键 词：煤系气 含气量 资源量 有利层段 平顶山矿区 

分 类 号：TE122[石油与天然气工程—油气勘探]