松辽盆地德惠凹陷下白垩统储层成岩作用研究  

Reservoir Diagenesis of Low Cretaceous in Dehui Depression of Songliao Basin

作　　者：孟培伟 李志臻 张雨 李瑞雪 MENG Pei-wei;LI Zhi-zhen;ZHANG Yu;LI Rui-xue(Engineering Technology Branch,CNOOC Energy Technology&Services Limited,Tanggu 300452,Tianjin,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津塘沽300452

出　　处：《承德石油高等专科学校学报》2022年第5期1-8,20,共9页Journal of Chengde Petroleum College

摘　　要：根据研究区岩心、录井、测井及分析化验资料,结合区域地质背景分析,采用物源分析、沉积相分析、成岩作用分析、储层评价等综合研究方法,较系统地研究了松辽盆地德惠凹陷下白垩统储层的成岩作用,分析了储集性能的主控因素。研究结果表明:该储层岩石类型以中粗粒的岩屑砂岩、长石质岩屑砂岩、岩屑质长石砂岩和长石砂岩为主,稳定组分石英含量较少,岩石成分成熟度及结构成熟度均较低,其中岩屑以火山岩岩屑为主,平均含量分别为沙河子组42.58%、营城组27.57%、登娄库组23.16%。沉积相类型为辫状河三角洲、近岸水下扇、扇三角洲和湖泊相。成岩作用类型主要有压实作用、胶结作用和溶蚀作用。研究区储层砂岩的成岩阶段处于中成岩A期到中成岩B期。Based on data of cores,well logging,mud logging and analysis assay data in the research area,combining with the analysis of geological settings and adopting the approaches of analysis on provenance,sedimentary facies,diagenesis and reservoir evaluation,this paper studies physical properties of reservoirs,diagenesis types and controlling factors of reservoir property systematically.The results of the study show that main types of reservoir rock of low Cretaceous in Dehui Depression are medium-coarse granular lithic sandstone,feldspathic lithic sandstone,and lithic arkose and arkose,which have low component and texture maturity.The main sedimentary facies are braid-river delta facies,near-bank submerged alluvial fan facies,fan-delta facies and lacustrine.The main diagenesis types which reservoirs experienced included compaction,pressure-solution,cementation and dissolution.The influence of diagenesis on reservoir physical property is mainly the change of porosity and permeability.According to the study of diagenetic evolution sequences,the diagenetic stage of the reservoir in Dehui Depression dated from the Middle-A period to the Mid-B period.

关 键 词：松辽盆地 德惠凹陷 下白垩统 成岩作用 成岩阶段 

分 类 号：P618.13[天文地球—矿床学]