| 松辽盆地梨树断陷营城组低渗透储层成因机制 |
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| 引用本文： | 葸克来,操应长,蔡来星,周磊,杨春宇,王健.松辽盆地梨树断陷营城组低渗透储层成因机制[J].现代地质,2013(1):208-216. |
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| 作者姓名： | 葸克来 操应长 蔡来星 周磊 杨春宇 王健 |
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| 作者单位： | 中国石油大学地球科学与技术学院 |
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| 基金项目： | 国家科技重大专项项目(2011ZX05009-003);中国石油大学(华东)研究生自主创新科研计划项目(12CX06012A) |
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| 摘 要： | 松辽盆地梨树断陷营城组储层岩石类型以长石砂岩和岩屑质长石砂岩为主,储层物性测试结果表明,该区储层物性较差,整体具有"低孔特低孔-特低渗超低渗"的特征。综合利用岩心观察、薄片鉴定、图像分析及压汞测试等多种技术方法,对梨树断陷营城组低渗储层特征及物性控制因素进行分析,结果显示:储层主要的储集空间类型为原生孔隙、次生溶蚀孔隙及少量混合孔隙,发育压实作用、溶解作用、胶结作用及交代作用等成岩作用类型;成岩作用演化序列为压实作用→长石、岩屑溶解/石英加大→碳酸盐胶结→碳酸盐溶解;沉积作用和成岩作用之间的耦合关系决定了储层物性的好坏。在此基础上,采用反演回剥的方法进行成岩演化序列与孔隙结构约束下的储层地质历史时期物性演化史恢复。二者结合研究表明,研究区低渗储层成因机制主要为沉积作用主控、压实作用主导、胶结作用强化。
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| 关 键 词： | 梨树断陷 营城组 低渗透储层 成因机制 反演回剥法 |
Genetic Mechanism of Low-permeability Reservoir of Yingcheng Formation in Lishu Fault Depression,Songliao Basin |
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| XI Ke-lai,CAO Ying-chang,CAI Lai-xing,ZHOU Lei,YANG Chun-yu,WANG Jian.Genetic Mechanism of Low-permeability Reservoir of Yingcheng Formation in Lishu Fault Depression,Songliao Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2013(1):208-216. |
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| Authors: | XI Ke-lai CAO Ying-chang CAI Lai-xing ZHOU Lei YANG Chun-yu WANG Jian |
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| Institution: | (School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China) |
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| Abstract: | The main rock types of Yingcheng Formation in Lishu Fault Depression of Songliao Basin are arkose and lithic arkose.The result of reservoir physical property test showed that reservoir physical properties are poor in this area,which have characteristics of low to ultra-low porosity and special low to super-low permeability.This paper analyzed the low-permeability reservoir's characteristics and its property controlling factors by utilization of core observation,thin section identification,image analysis,mercury testing and other technical methods.The main reservoir pore spaces are primary,secondary dissolution pores and a small amount of mixed pores.The diagenetic types of the reservoir are compaction,dissolution,cementation,metasomatism,and so on,and the diagenetic evolution sequence is compaction→feldspar and debris dissolution→carbonate cementation→carbonate dissolution.Thus the sedimentation and diagenesis coupling relationship determines the quality of reservoir properties.On the basis of the above,the inversion method of back stripping was used to recover the reservoir properties and its evolution history during the geological time under the constraint of reservoir diagenesis evolution sequence and reservoir pore structure.The results show that the low-permeability reservoir's physical properties are fundamentally controlled by deposition,moreover,the low-permeability characteristics are predominated by compaction and enhanced by cementation. |
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| Keywords: | Lishu Fault Depression Yingcheng Formation low-permeability reservoir genetic mechanism inversion method of back stripping |
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