摘要
开发地质条件研究将为贵州六盘水煤田盘关向斜煤层气勘探开发提供科学依据。为此,以煤田地质勘探和矿井瓦斯资料为基础,结合井下煤层割理裂隙观测和室内等温吸附实验等方法手段,总结了煤层气地质背景,揭示了煤储层特征和含气性特征,估算了理论采收率和煤层气资源量。研究结果表明:盘关向斜为水压向斜煤层甲烷气气藏,2000m以浅煤层气资源量达1778×108m3;该区煤层气资源量丰富、埋深和煤级适中、含气量较高、渗透性较好,具备煤层气开发的基本条件;盘关向斜煤层主要属勉强可以抽放煤层和易于抽放煤层,部分为较难抽放煤层,煤系下部煤层透气性较上部煤层为好;煤层气利用方式则可选择发展以甲烷为原料的化工工业。
Study of development geologic conditions can provide a scientific basis for exploration and development of coalbed methane in Panguan syncline of Liupanshui coal field, Guizhou province. Based on the geological exploration data and mine gas data of this coal field, and in combination with the measurements of downhole coalbed cleats and fractures and laboratory experiment of isothermal adsorption, this paper summarizes the geologic settings of coalbeds, reveals the characteristics of coal reservoirs and gas-bearing properties, and estimates the theoretical recovery factor and coal-bed methane resources. Liupanshui syncline is a coalbed methane gas pool of hydraulic syncline type, with resources of 177.8 BCM within 2000 m deep. The study area is characterized by rich coalbed methane resources, moderate burial depth and coal rank, high gas concentration, and good permeability, thus it has the conditions of coalbed methane development. Most of the coalbeds in Panguan syncline are easily-drainable or drainable, and some are hard drainable. The lower coalbeds are better than the upper coalbeds in air penetrability. The produced coalbed methane can be used as the raw materials of chemical engineering.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2007年第5期29-31,共3页
Natural Gas Industry
基金
国家重点基础研究发展规划项目课题(编号:2002CB211703)资助
关键词
六盘水煤田
盘关向斜
煤成气
开发
地质
评价
Liupanshui coal field, Panguan syncline, coal-derived gas, development, geology, assessment
