六盘山盆地石炭系—二叠系成藏组合特征分析与评价  

Analysis and evaluation of the Carboniferous-Permian play characteristics of Liupanshan basin

作　　者：谢青[1] 杨兴科[1] 江宽 杨龙伟[1] 张正民[1] 

机构地区：[1]长安大学地球科学与资源学院,西安710054 [2]中国石油西部管道兰州输气分公司,兰州730070

出　　处：《地质找矿论丛》2016年第3期390-395,共6页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局地质调查工作资金项目(编号:12120113039900);中央高校基金"优秀博士论文"项目(编号:310827165013)资助

摘　　要：六盘山盆地区域构造位置特殊,是一个多组多期构造带和地块交汇叠合部位。据野外调研,油气显示出露多,表明盆地具有一定的生油气潜力。为了探明六盘山盆地石炭系—二叠系的地质背景、烃源岩、储层及成藏组合等,采用野外调研、实验分析、拟编、标准界定等方法,对石炭系—二叠系石油地质条件及成藏组合进行了分析和评价。结果表明,六盘山盆地大地构造背景复杂,石炭系发育良好,属于滨海、潟湖、沼泽、海陆交互相等;厚层灰-黑色页岩、泥岩、碳质泥岩可以作为有利的生油气层。二叠系分布局限,属于河流、湖沼相沉积,发育了中-细粒岩屑砂岩及长石岩屑砂岩,以剩余粒间孔、溶蚀粒间孔为主,物性相对较好,总体属于中低孔、低渗型储集层。石炭系形成了两套成藏组合——自生自储和下生上储成藏组合;二叠系在下生上储中发挥良好储层的作用。Liupanshan basin is located at a special tectonic position where multi-group and multi-stage structural belts cut the geological block. During field investigation many oil and gas show exposures are discovered suggesting a certain potential of oil and gas here. The geological background,source rocks and the play are investigated in the field and experimental analysis are carried out to comprehensively analyze and evaluate the geological conditions and play. The results show： tectonic background of Liupanshan ba- sin is complex; the carboniferous strata well developed belonging to the coast, lagoon and swamp, littoral and marine-continent alternating sedimentary facies; thick grey and black shale, mudstone, carbonaceous mudstone the powerful source layers; Permian system distribution limited belonging to fluvial, limnetic facies of medium-fine grained lithic sandstone and feldspathic lithic sandstone with the dominant residual intergranular pore and dissolution intergranular pore; the Permian strata is a medium-low porosity and low permeability reservoir with better physical properties; Carboniferous system has two sets of play of which one combines gas-oil generating a storing together at the same place and the other is varied in its gas-oil generating at lower part and storing at upper part.

关 键 词：烃源岩 储层 成藏组合 石炭系—二叠系 六盘山盆地 

分 类 号：P536[天文地球—古生物学与地层学] P618.130.21[天文地球—地质学]