川南地区下古生界筇竹寺组与龙马溪组页岩气纵向对比及评价  

Shale gas comparision and evaluation of Longmaxi formation and Qiongzhusi formation of lower Palaeozoic in the area of southern Sichuan

作　　者：李晓萌[1] 潘仁芳[1] 武文竞 鄢杰[1] 陆益祥 LI Xiaomeng PAN Renfang WU Wenjing YAN Jie LU Yixiang(College of Earth Sciences, Yangtze University, Wuhan Hubei 430100, China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100

出　　处：《石油化工应用》2016年第10期87-92,共6页Petrochemical Industry Application

基　　金：国家自然科学基金项目"页岩油;气甜点构成要素比较研究";项目编号:41472123

摘　　要：据现今资料表明,川南地区筇竹寺组与龙马溪组均有工业性气流的产出。但是在勘探初期,对优选层位以及优选区块的研究结果并不统一。笔者将从有机化学要素和岩石物理对比等方面,对川南地区筇竹寺组与龙马溪组页岩进行评价,综合各项评价指标进行优选分析。研究区内筇竹寺组TOC的值是0.23%~3.2%,平均为1.7%。龙马溪组TOC的值为0.28%~4.5%,平均为2.2%。筇竹寺组与龙马溪组有机质类型都为腐泥型。筇竹寺组镜质体反射率Ro高于龙马溪组,都高于2.0%,属于过成熟阶段。在岩石物理方面,筇竹寺组脆性矿物含量高于龙马溪组,后期具有更大的开采潜力。在孔渗性以及含气性方面,龙马溪组孔渗性较好,有利于页岩气的吸附,含气量也较好。综合各项评价指标,得出龙马溪组具有优先开采潜力,但筇竹寺组也具有巨大的开采价值。According to the present results, Qiongzhusi formation and Longmaxi formation both have industrial gas outputting in the southern Sichuan. In the early stage of exploration,the results are not uniform. The author will evaluate the shale from organic chemical elements and comparison of petrophysical parameters, then select the preference formation. The TOC value of Qiongzhusi is 0.23 %~3.2 %, the average is 1.7 %. The TOC value of Longmaxi is 0.28 %~4.5 %, the average is 2.2 %. The organic type of Qiongzhusi and Longmaxi is sapropel type. The vitrinite reflectance Ro of Qiongzhusi is higher than that of Longmaxi,the Ro are both higher than 2 % which belong to the mature stage. In the rock physics,Qiongzhusi brittle mineral content is higher than Longmaxi, which has greater potential for exploitation. The porosity and permeability of Longmaxi formation is much better, which is helpful to the adsorption of shale gas. The comprehensive evaluation index, the Longmaxi group has the priority exploitation potential, but Qiongzhusi formation, also has great value of exploration.

关 键 词：筇竹寺组 龙马溪组 有机化学要素 岩石物性参数 

分 类 号：P618.13[天文地球—矿床学]