西页1井龙潭组海陆过渡相页岩含气性分析  

The gas-bearing characteristics analysis of the Longtan Formation transitional shale in Well Xiye 1

作　　者：王中鹏[1,2] 张金川[1,2] 孙睿[1,2] 刘昌为[1,2] 杜晓瑞[1,2] 卢亚亚[1,2] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国地质大学(北京)教育部海相储层演化与油气富集机理重点实验室,北京100083

出　　处：《地学前缘》2015年第2期243-250,共8页Earth Science Frontiers

基　　金：国土资源部"全国油气资源战略选区调查与评价"专项(2009GYXQ15);国家自然科学基金项目(41102088)

摘　　要：目前,国内外在海陆过渡相页岩含气性方面的相关研究较少。位于贵州省毕节地区黔西县境内的页岩气参数调查井西页1井揭示了黔西北地区上二叠统龙潭组海陆过渡相黑色碳质页岩发育特征及其含气性特点。通过有机地球化学实验,获取了西页1井的有机地化参数：TOC含量分布范围为0.4%~17.85%,平均值为4.25%;Ro分布范围为2.68%~3.48%,平均值为3.06%。钻、录、测井资料分析显示该井钻遇上二叠统龙潭组富有机质页岩层系厚度为148.85m,在钻进过程中,共有6层出现气显示。利用测井资料、现场解吸和等温吸附实验数据分析和计算,认为龙潭组海陆过渡相页岩含气页岩层段多,具有良好的吸附能力,得到总含气量为1.40~19.60m3/t。通过以上结果分析表明：西页1井所揭示的上二叠统海陆过渡相龙潭组含气页岩具有层段数量多、单层厚度小、有机质分段富集、热演化成熟度偏高等特点,且含气性较好,故该区海陆过渡相龙潭组地层具有较大的页岩气资源潜力。Currently, researches on the transitional facies shale gas-bearing characteristics are limited. A strategically survey Well Xiye 1, located in the Qianxi County of Guizhou Province, helped us understand the characteristics of transitional black shale of Upper Permian Longtan Formation and its gas-bearing property. Through organic geochemical experimental analysis, its organic carbon content has a range of 0.4%- 17.85% with an average of 4. 25%; Ro is 3.06% in average, ranging between 2. 68% and 3.48%. From the drilling results of this well, the thickness of black shale in the Upper Permian Longtan Formation is 148. 85 m. During the process of drilling, there appears gas-bearing possibility in 6 strata by logging statistics. Through the analysis of logging statistics, live desorption and isothermal absorption experimental data, the Longtan Formation has a large quantity of gas-bearing shale strata and possesses the favorable absorbing capacity. The gas content in black shale of the Longtan Formation was calculated to be within the range of 1.4 - 19. 6 m3/t. All the results above demonstrate that Longtan Formation transitional shale has a large quantity of thin shale layers, a high level of organic matter abundance and maturity and excellent gas-bearing characteristics. There is great potential of shale gas resource in the Guizhou Province.

关 键 词：黔西北 西页1井 龙潭组 海陆过渡相页岩 含气性 

分 类 号：P618.13[天文地球—矿床学]