石油学报 ›› 2015, Vol. 36 ›› Issue (2): 150-162.DOI: 10.7623/syxb201502003

• 地质勘探 • 上一篇    下一篇

川南及邻区龙马溪组黑色岩系矿物组分特征及评价

王秀平1,2, 牟传龙2,3, 葛详英2,3, 陈小炜2,3, 周恳恳2,3, 王启宇2,3, 梁薇2,3   

  1. 1. 山东科技大学地质科学与工程学院 山东青岛 266590;
    2. 国土资源部沉积盆地与油气资源重点实验室 四川成都 610081;
    3. 中国地质调查局成都地质调查中心 四川成都 610081
  • 收稿日期:2014-08-30 修回日期:2015-01-12 出版日期:2015-02-25 发布日期:2015-02-05
  • 通讯作者: 牟传龙,男,1965年1月生,1984年毕业于成都地质学院,现为中国地质调查局成都地质调查中心研究员、博士生导师,主要从事沉积地质学及油气地质学研究。Email:cdmchuanlong@163.com
  • 作者简介:王秀平,女,1988年5月生,2010年获山东科技大学学士学位,现为山东科技大学博士研究生,主要从事沉积与储层研究。Email:wangxiuping198805@126.com
  • 基金资助:

    中国石油化工股份有限公司勘探南方分公司项目与中国岩相古地理编图项目(No.1212010916060)资助。

Mineral component characteristics and evaluation of black rock series of Longmaxi Formation in Southern Sichuan and its periphery

Wang Xiuping1,2, Mou Chuanlong2,3, Ge Xiangying2,3, Chen Xiaowei2,3, Zhou Kenken2,3, Wang Qiyu2,3, Liang Wei2,3   

  1. 1. Institute of Geological Science and Engineering; Shandong University of Science and Technology, Shandong Qingdao, 266590;
    2. Key Laboratory of Sedimentary Basins and Oil & Gas Resources, Ministry of Land and Resources, Sichuan Chengdu, 610081;
    3. Chengdu Institute of Geology and Mineral Resources, China Geological Survey, Sichuan Chengdu 610081
  • Received:2014-08-30 Revised:2015-01-12 Online:2015-02-25 Published:2015-02-05

摘要:

依据33条露头剖面和1口钻井岩心资料,结合显微镜、背散射、扫描电镜及X射线衍射等分析方法,对川南及邻区下志留统龙马溪组下段黑色岩系矿物组分与TOC的关系进行了研究。研究认为矿物组分对其TOC有一定的影响,硅质型页岩的TOC最高,其次为黏土质型页岩,碳酸盐质型页岩TOC最低。研究区硅质型页岩最为发育,石英和黏土矿物分别以生物和碎屑成因为主,而碳酸盐矿物主要为自生类型。在有机质分布特征的基础上,根据有利烃源岩矿物组分的基本评价标准,对页岩气有利分布区进行了预测。从绥江向NE方向至石柱为页岩气有利区,其中武隆―彭水地区(I1)、赤水―习水地区(I2)、隆昌―永川地区(I3)以及绥江―水富地区(I4)为页岩气最有利区;长宁―叙永地区(II)为页岩气次级有利区。

关键词: 矿物组分, 有机质特征, 页岩气, 龙马溪组, 下志留统, 川南及邻区

Abstract:

Based on 33 outcrop profiles and one-well coring data in combination with microscope, back scattering, scanning electron microscope, X-ray diffraction and other analytical methods, the relationship between mineral component and total organic content (TOC) of black rock series in the lower Longmaxi Formation in Southern Sichuan and its periphery is figured out. The research indicates that mineral components have a certain influence on TOC. The TOC of siliceous shale is maximum, followed by clayey shale; that of carbonate shale is least. In the study area, siliceous shale is most developed; the origin of quartz and clay minerals are dominated by biogenesis and clastogene; carbonate minerals are mainly authigene. Based on the distribution characteristics of organic matters, the possible distribution areas of shale gas are predicted according to the basic evaluation criteria of mineral component in favorable hydrocarbon source rocks. The vast area from Suijiang northeastward to Shizhu is most favorable area for shale gas, in which Wulong-Pengshui region (I1), Chishui-Xishui Region (I2), Longchang-Yongchuan Region (I3) and Suijiang-Shuifu Region (I4) are favorable blocks; Changning - Xuyong (II) is a secondarily favorable area.

Key words: mineral component, characteristics of organic matters, shale gas, Longmaxi Formation, Southern Sichuan and its periphery

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