梨树断陷火石岭组-泉头组地层水特征及其油气指示作用  

Characteristics of the Huoshiling-Quantou Formation water and their implications forhydrocarbon accumulation in the Lishu faulted-sag of the Southern Songliao Basin

作　　者：逄海明[1] 徐杰 张玺[1] 李海彬[1] 张大千[1] PANG Haiming;XU Jie;ZHANG Xi;LI Haibin;ZHANG Daqian(Exploration&Development Research Institute of Northeast Oil&Gas Company,SINOPEC,Changchun 130062,Jilin,China;School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国石化东北油气分公司勘探开发研究院,吉林长春130062 [2]中国地质大学(北京)海洋学院,北京100083

出　　处：《石油地质与工程》2024年第4期24-32,38,共10页Petroleum Geology and Engineering

基　　金：中国石油化工股份有限公司科技部项目“东北地区油气资源潜力与选区评价研究”(P22062)。

摘　　要：地层水的形成与分布伴随着成盆、生烃、成藏的整个过程,对研究油气成藏具有重要指示作用。为明确梨树断陷火石岭组-泉头组地层水特征及其油气指示作用,对梨树断陷120余口井火石岭组-泉头组地层水进行了分析,探索了地层水发育特征与油气藏之间的耦合关系。结果表明,区内地层水化学特征具明显差异,结合环境差异和保存条件,可将梨树断陷火石岭组-泉头组地层水分为三类六种水动力驱动类型,其演化经历了从大气水下渗→沉积水→内生水的过程。营城组以下地层以压实驱动型和内生驱动型为主,地层水呈现出多沉积中心向周缘泄流补给和内部滞留的特征,有利于隐蔽和非常规油气藏的发育。登娄库组-泉头组以重力驱动型为主,地层水受重力驱动自断陷东南向西北泄流,在断陷东南部和中部发育以构造为主的油气藏发育。该成果对于我国东部其他断陷盆地的油气藏分布规律研究及勘探部署具有一定指导意义和借鉴价值。The evolution and characteristics of formation water is accompanied by the whole process of basin formation,hydrocarbon generation and accumulation,which is an important indicator for oil and gas accumulation.In order to clarify the characteristics of formation water and its hydrocarbon indicating role in the Huoshiling-Quantou Formation of the Lishu faulted-sag,more than 120 wells were analyzed,and the coupling relationship between the development characteristics of formation water and reservoirs was explored.The results show that there are obvious differences in the chemical characteristics of formation water in the area.Based on environmental differences and preservation conditions,the formation water of the Huoshiling-Quantou Formation can be classified into three categories and six hydrodynamic driven forces.Its evolution has undergone the process of infiltration from atmospheric water to deposition water to internal water generation.The formation water below the Yingcheng Formation are mainly characterized by compaction and endogenous driven,and shows the characteristics of discharge and recharge from multiple sedimentary centers to the periphery and internal retention,which is conducive to the development of subtle and unconventional oil and gas reservoirs.The Denglouku-Quantou Formation water is mainly driven by gravity,and it is driven by gravity to drain from southeast to northwest.In the southeastern and central parts of the faulted-sag,oil and gas reservoirs dominated by structures are developed.The results have a good guiding reference for reservoir distribution and exploration deployment in other faulted basins in eastern China.

关 键 词：梨树断陷 水动力系统 驱动类型 沉积中心 内生驱动型 

分 类 号：P618.13[天文地球—矿床学]