| 摘要: |
| 通过岩心观察、薄片鉴定、扫描电镜分析、X-衍射分析等手段，对济阳坳陷中生界碎屑岩储层特征及其控制作 用进行了分析。结果表明,济阳坳陷中生界主要发育了冲积扇、扇三角洲、河流、三角洲等储集砂体,碎屑岩储层主 要经历了压实压溶、胶结、交代及溶解等成岩作用，该区储集空间主要为溶解孔隙及裂缝,储集性能主要受沉积作 用、构造作用和成岩作用控制。沉积作用是最重要的控制因素,其中三角洲砂体物性最好，河流砂体次之，冲积扇、 扇三角洲及滨浅湖砂体物性较差;构造作用对储集物性的改造主要表现为断层活动和不整合，断S活动便储层形成 大量裂缝，不整合面之下约100 m内储层物性明显提高;溶解作用受沉积和构造作用的控制,其对储层的改造程度与 沉积相带及距不整合面的距离密切相关。综合考虑储层物性的控制作用,可将济m坳陷中生界碎屑岩储层划分为4 种类型,其中，I类储层为高孔中渗型，n,和112亚类储层为中孔低渗型，113亚类储层为低孔低渗型和iv类储层 为特低孔特低渗型。 |
| 关键词: 济阳坳陷 中生界 碎屑岩储层 储层持征 控制因素 综合评价 |
| DOI： |
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| 基金项目:教育部新世纪优秀人才支持计划项目(NCET) |
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| Clastic reservoirs characteristics and its control of Mesozoic in Jiyang depression |
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WANG Yan-zhong1,CAO Ying-chang1,CHEN Shi-yue1,WANG Peng2,WANG Shu-ping3
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(1. FacuUy of Geo-Resowce and Information in China University cf Petroleum, Dongyin^ 257061, Shmidong Province tChinai ;2. Geophysical Research Imtituie of Sherigii Oilfield, Dongying 257022, Shtndong Province T China;3. Research Institute of Geological Science, Shengli Oilfield Company Limited, Dotigyiag 2570151 Shandong Province,China)
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| Abstract: |
| On the basis of core observation, thin section arbitration, scanning electron microscope and X-diflraction analysisf the reservoir characteristics and control factors of clastic reservoir of Mesozoic in Jiyang depression were researched. The reservoir sandbodies of alluvial fan, ￡an delta, fluvial and delta were developed. The clastic reservoirs mainly went through strong compaction and pressure solution t cementation, metasomasis and dissolution. The analysis reBultR of reservoir charac-terislicg and its control factors of clastic reservoirs show that solution pores and fractures are main reservoir spaces, and sedimentation ，tectonization and diagenesis control the porosity and permeability of clastic reservoirs. Sedimentation is the most important control factor, among other things, the porosity and peimeability of delta sandbody are the liighest, of the fluvial sandbody take second place, and of the alluvial fan，fan delta and shore-shallow lake are poor. The influence of tectonization on clastic reservoirs properties includes the fault activities and unconformities. Many fractures are formed becau&e of fault moving, and the porosity and permeability of reservoirs locating about 100 m under unccmfoimity interfaces increase obviously. Dissolution is controlled by both sedimentation and tectonization f and the converted degree on reservoirs is closely related to sedimentary facies and the distance from unconformity intetfaces. Comprehensively considering the control of sedimentation Ttectoniaation and diagenesis on reservoirB,the clastic reservoirs are divided into four categaiiea rof which, type 1 is high porosity and medium permeability reservoir,type H , and II2 are medium porosity and low permeability reservoir,type H3 is |
| Key words: Jiyang depression Mesozoic clastic reservoirs reservoir characteristics control factors comprehensive evaluation |
