第27卷第1期 2013年2月
现代地质 CEOSCIENCE
VoL 27No.1 Feh. 2013
松辽盆地梨树断陷营城组低渗透储层成因机制
蕙克来，操应长，蔡来星，周磊，杨春宇，王健
（中国石油大学地球科学与技术学院，山东青岛266580）
摘要：松辽盆地桑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、薄片整定、图像分析及压汞测试等多种技术方法，对梁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一→+长石、岩屑溶解/石英加大一+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案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，研究区低渗储层咸因机制主要为沉积作用主控、压实作用主导、胶结作用强化。关键调：梨树断陷；营城组；低渗透储层；成因机制；反演回刹法
中图分类号：TE122.2
文献标志码：A
文章编号：10008527(2013)01020809
Genetic Mechanism of Low-permeability Reservoir of Yingcheng
FormationinLishuFaultDepression,SongliaoBasin
XI Ke-lai, CAO Ying-chang, CAI Lai-xing, ZHOU Lei, YANG Chun-yu, WANG Jian
(School of Geosciences, China Uaisersiy f Peroleum, Qingdeo, Shandong 266580, Chine)
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 utiliza-tion of core observation, thin section identification, image analysis, mercury testing and other technical meth-ods. 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 compactionfeldspar and debris dissolution→carbonate cementa-tion→carbonate dissolution. Thus the sedimeritation 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 diagene-sis evolution sequence and reservoir pore structure. The results show'that the low-permeability reservoir's physi-cal properties are fundamentally controlled by deposition, moreover, the low-permeability characteristics are predominated by compaction and enhanced by cementation.
Key words: Lishu Fault Depression; Yingcheng Formation; low-permeability reservoir; genetic mechanism; inversion method of back stripping
收稿日期：2012-07-03；改回日期：2012-11-07；责任编辑：潘令枝。
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)。作者篇介：蕙克来，男，博土研究生，1988年出生，地质学专业，主要从事沉积学与油气储层地质学方面的研究工作。
Email：kelai06016202@126.eom。