济阳坳陷不同岩相页岩油赋存机理

发布时间：2018-04-05 03:41

本文选题：泥页岩岩相　切入点：页岩油　出处：《石油学报》2017年02期

【摘要】：通过大量岩心观察、薄片鉴定、X-射线衍射全岩矿物分析和扫描电镜分析,将济阳坳陷古近系泥页岩划分为10余种岩相并分析了主力岩相的特征和形成环境。在岩相划分的基础上,结合氩离子抛光和环境扫描电镜技术,分析了不同岩相的储集空间和页岩油赋存状态。济阳坳陷泥页岩的储集空间主要包括各类基质的孔隙和裂缝。富有机质纹层状泥质灰岩/灰质泥岩储集空间是方解石晶间孔、黏土矿物晶间孔、层间缝,孔隙最大,裂缝最发育;富有机质层状泥质灰岩/灰质泥岩储集空间是方解石晶间孔、黏土矿物晶间孔、(微)裂缝;含有机质块状灰质泥岩储集空间是黏土矿物晶间孔,孔隙最小,裂缝不发育。不同岩相有不同的赋存状态,富有机质纹层状灰质泥岩相/泥质灰岩相和层状灰质泥岩相/泥质灰岩相以游离态为主,含有机质块状灰质泥岩相以吸附态为主。建立了富有机质纹层状-层状岩相和含有机质块状岩相2种页岩油赋存模式。
[Abstract]:Based on a large number of core observations, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, the Paleogene shale in Jiyang depression is divided into more than 10 kinds of lithofacies and the main lithofacies characteristics and forming environment are analyzed.Combined with argon ion polishing and environmental scanning electron microscopy, the reservoir space and shale oil occurrence state of different lithofacies were analyzed on the basis of lithofacies classification.The reservoir space of shale in Jiyang depression mainly includes pores and fractures of various substrates.The reservoir space of lamellar argillaceous limestone / lime-mudstone rich in organic matter is calcite intergranular pore, clay mineral intergranular pore, interlayer fracture, the largest pore and the most developed fracture.The reservoir space of stratified argillaceous limestone / lime-mudstone rich in organic matter is calcite intergranular pore and clay mineral intergranular pore (micro-fracture), while organic mate-bearing massive lime-mudstone reservoir space is clay mineral intergranular pore with the smallest pore, and the fracture is not developed.Different lithofacies have different occurrence states. The organic matter rich lamellar lime-mudstone facies / shaly limestone facies and layered lime-mudstone facies / shaly limestone facies are mainly free-form, and the organic organic-bearing massive lime-mudstone facies are mainly adsorbed.Two types of shale oil occurrence models are established, which are rich in organic matter, laminar stratiform lithofacies and organic matter bearing massive lithofacies.
【作者单位】：中国石油化工股份有限公司胜利油田分公司勘探开发研究院;
【基金】：国家重大科技专项“济阳坳陷油气富集机制与增储领域”(2011ZX05006-003)资助
【分类号】：P618.13

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