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淮南煤田西部煤层甲烷资源研究

A RESEARCH ON COAL BED METHANE RESOURCES IN THE WEST OF HUAINAN COALFIELD

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【作者】 刘建华汪大发唐修义

【Author】 Liu Jianhua and Wang Dafa (Hefei Coal Design Research Institute) and Tang Xiuyi (Huainan College of Mining and Technology).NATUR.GAS IND.v.19,no.5,pp.13~16,9/25/99.(ISSN 1000-0976;In Chinese)

【机构】 合肥煤炭设计研究院淮南工业学院

【摘要】 安徽淮南煤田西部二叠纪含煤地层中, 煤层甲烷含量具有如下规律性变化:纵向上为中、下部高于上部, 横向上则为中部高, 东、西部低。本区煤的变质程度仅达气煤阶段, 甲烷含量与煤层埋深之间的正相关关系约在地表下垂深1 200 m 以浅反映得比较明显,尽管煤层甲烷的封闭条件比较好,但受构造的影响,局部降低了围岩的气密性,并形成了贫、富甲烷区段。根据对煤层甲烷资源的了解程度,选择了煤炭储量的类别、煤层甲烷含量的有效测点密度和评价验证钻孔中参数的获取情况这三项指标,将甲烷资源量划分为实证、控制、概略、远景和潜在5 个级别。本区三层主要煤层的甲烷资源量累计为200 .69 ×10 8 m 3 。总体来看, 本区煤层甲烷资源地面开发的前景不容过分乐观,但小范围开发可能取得一定的成效。开发试验区以张集井田最为合适。

【Abstract】 In the west of Huainan coalfield in Anhui Province,the change in coal bed methane content in the coal bearing strata of Permian is of the following rules,i.e.the methane content in the middle and lower parts is higher than that in the upper part in vertical and that in the centre is larger than that in the east and west in horizontal.The grade of coal metamorphism in this region is reaching the gas coal rank only.A positive correlation between methane content and burial depth can be found within vertical depths of less than 1 500 m.Although the conditions of confining the coal bed methane are fair,the gas tightness of local surrounding rock is reduced so as to form the poor and rich in methane areas and intervals because of the influence of tectonic conditions.Based on the degree of prospecting,the methane resources may be divided into five grades as proved,controlled,probable,prospective and potential resources in light of three indexes,i.e.the categories of coal reserves,the effective survey point density (with a threshold value of 0.8 point per square kilometer) of coal bed methane content and the collection of parameters in evaluation drilling.The methane resource extent in three major coal beds is 20 069 million m 3 in this region.In general,the prospect for developing the coal bed methane resources is not very bright,a certain effect,however,can be obtained in a local area.It is most suitable to take Zhangji mine field as the development test area.

  • 【文献出处】 天然气工业 ,NATURAL GAS INDUSTRY , 编辑部邮箱 ,1999年05期
  • 【分类号】TE37
  • 【被引频次】6
  • 【下载频次】88
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