辽河东部凹陷中南段走滑转换带发育特征及其对油气运聚的控制作用  

Characteristics of the strike-slip transfer zone in the central-southern part of the eastern Liaohe Depression and its control on hydrocarbons migration and accumulation

作　　者：沈澈 蒋有录[1] 韩宏伟[2] 孙新宇 SHEN Che;JIANG Youlu;HAN Hongwei;SUN Xinyu(School of Geosciences in China University of Petroleum(East China),Qingdao 266580,China;Exploration&.Development Research Institute of PetroChina Liaohe Oilfield Company,Panjin 124010,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《中国石油大学学报(自然科学版)》2025年第2期93-107,共15页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气股份有限公司辽河油田分公司科研项目(2023100215FS0986);国家自然科学基金面上项目(41972140)。

摘　　要：辽河东部凹陷中南段油气具有平面分布不均,纵向多层系富集的特征,走滑转换带对油气运移聚集起到重要的控制作用。综合利用地质、测井、地震等资料,识别并划分研究区走滑转换带类型,总结走滑转换构造对油气运聚的控制作用。结果表明:辽河东部凹陷中南段自北向南依次发育双断叠覆增压型、双断叠覆释压型、单断弯曲增压型、单断帚状释压型4类走滑转换带。释压型转换带内油源断裂活动速率大,发育连通砂体,有利于油气的垂向与侧向运移。增压型转换带内断裂活动性弱、封闭能力强,有利于油气的保存。建立4类走滑转换带控制油气运聚模式,单断S型增压型转换带和单断帚状释压型转换带具有断裂强输导特征,控制油气浅部层系富集;双断叠覆增压型和双断叠覆释压型转换带具有断裂强封闭特征,控制油气深层或多层系富集。In the central-southern part of the eastern Liaohe Depression,hydrocarbons exhibit an uneven planar distribution and rich vertical multi-formation accumulation characteristics.The strike-slip transfer zones play a crucial role in controlling hydrocarbon migration and accumulation.Based on an integrated analysis of geological,logging,and seismic data,this study identifies and classifies the strike-slip transfer zones in the region and summarizes their control mechanisms on hydrocarbon migration and accumulation.The results indicate that four types of strike-slip transfer zones are sequentially distributed from north to south:the dual-branch superimposed pressurized transfer zone,the single-branch S-type pressurized transfer zone,the dual-branch superimposed depressurized transfer zone,and the single-branch broom-shaped depressurized transfer zone.In depressurized transfer zones,oblique slip rates along source fractures are high,and interconnected sandstone bodies are well developed,facilitating both vertical and lateral hydrocarbon migration.In contrast,in pressurized transfer zones,fracture activity is weaker,and sealing capacity is stronger,which is favorable for hydrocarbon preservation.These strike-slip transfer zones govern hydrocarbon migration and accumulation patterns.The single-branch S-type pressurized transfer zone and the single-branch broom-shaped depressurized transfer zone are characterized by intense fault activity,primarily controlling hydrocarbon accumulation in shallow formations.In contrast,the dual-branch superimposed depressurized transfer zone and the dual-branch superimposed pressurized transfer zone exhibit strong fault sealing,primarily governing hydrocarbon accumulation in deep or multi-formation reservoirs.

关 键 词：走滑断裂 走滑转换带 运移条件 辽河东部凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]