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论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用——强生排烃特征及机理分析
引用本文:张文正,杨华,李剑锋,马军.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用——强生排烃特征及机理分析[J].石油勘探与开发,2006,33(3):289-293.
作者姓名:张文正  杨华  李剑锋  马军
作者单位:中国石油长庆油田公司勘探开发研究院
基金项目:中国石油天然气集团公司资助项目
摘    要:依据长,段油页岩段优质油源岩的地球化学测试资料、生烃热模拟实验结果,结合盆地石油地质特征,探讨了长,段优质油源岩排烃特征与机理,计算排烃率。长,段优质油源岩的总有机碳累计产油率达400kg/t左右,其生烃膨胀增压作用为石油初次运移(排烃)提供了充足的动力。油源岩中的“干酪根网络系统”与“孔、缝系统”共同构成了石油初次运移的立体网络系统。连续油相是最主要的石油初次运移相态。油页岩段在大量成熟生油阶段之前经受的强烈压实作用不会明显影响其排烃效率,其较低的残留孔隙度降低了滞留烃的能力,反而有助于排烃率的提高(计算的平均排烃率高达72%),并使得优质油源岩能够提供富烃、低含水的“优质流体”,从而为低渗透储集层的石油富集创造了十分有利的条件。图7表2参9

关 键 词:鄂尔多斯盆地  长7段油页岩  优质油源岩  排烃率  排烃机理  富烃优质流体
文章编号:1000-0747(2006)03-0289-05
收稿时间:07 29 2005 12:00AM
修稿时间:2005-07-292006-02-25

Leading effect of high-class source rock of Chang 7 in Ordos Basin on enrichment of low permeability oil-gas accumulation-Hydrocarbon generation and expulsion mechanism
ZHANG Wen-zheng,YANG Hua,LI Jian-feng,MA Jun.Leading effect of high-class source rock of Chang 7 in Ordos Basin on enrichment of low permeability oil-gas accumulation-Hydrocarbon generation and expulsion mechanism[J].Petroleum Exploration and Development,2006,33(3):289-293.
Authors:ZHANG Wen-zheng  YANG Hua  LI Jian-feng  MA Jun
Affiliation:Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Shaanxi 710021, China;Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Shaanxi 710021, China;Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Shaanxi 710021, China;Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Shaanxi 710021, China
Abstract:Based on geochemical testing,hydrocarbon-generation thermal simulation experiment,and the basin petroleum geologic characteristics,the paper analyzes the hydrocarbon-expulsion and mechanism of the high-class source rock in Chang 7 oil-shale section,and calculated the hydrocarbon expulsion rate.The yield of Chang 7 is up to 400kg/t.TOC and its increasing pressure action from hydrocarbon-generation expanding can offer enough energy for oil primary migration(hydrocarbon-expulsion).The kerogen network system and the pore-fracture system constitute a three-dimensional network system for the migration.The continuous oil phase is the main phase of primary migration.The intense compaction before the oil shale section matured and generated oil do not have any effect on the hydrocarbon-expulsion efficiency,on the contrary,the lower residual porosity reduces the capacity to occlude hydrocarbon, which is helpful to enhance hydrocarbon-expulsion efficiency(the average reaches 72%) and makes the high-class source rock have the good quality fluid with high hydrocarbon and low water.This provides advantageous conditions for crude oil concentration of low permeability reservoir.
Keywords:Ordos Basin  Chang 7 oil-shale rock  high-class source rock  hydrocarbon-expulsion rate  hydrocarbon-expulsion mechanism  good quality fluid with high hydrocarbon
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