辽河西部凹陷北区湖盆深陷期沉积储层响应  

The Responses of Sedimentation and Reservoir in Deep-faulted Period of Lacustrine Basin in the North of Western Sag of Liaohe Area

作　　者：王青春[1] 贺萍[1] 

机构地区：[1]石家庄经济学院,河北石家庄050031

出　　处：《石油天然气学报》2014年第1期1-5,共5页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(41172118);河北省自然科学基金项目(D2013403018)

摘　　要：辽河西部凹陷北区湖盆深陷期经历了初始断陷阶段→快速沉降阶段→稳定沉降阶段→剧烈沉降阶段→短暂回返阶段共5个阶段,发育2套三级层序及其5个体系域。初始断陷阶段,水体较浅,主要发育冲积扇沉积体,储层在成岩作用改造下,次生孔隙发育;快速沉降阶段和稳定沉降阶段,水体不断加深,发育了浊积扇和扇三角洲沉积体,储层原生孔隙比较发育,保存较好;剧烈沉降阶段和短暂回返阶段,湖盆再度剧烈沉降,主要发育辫状河三角洲沉积体,储层原生孔隙发育。断陷湖盆演化阶段不同,沉积储层响应特征各异。The lacustrine basin deep-faulted period in the north of the western sag of Liaohe Area could be divided into five stages such as initial faulted stage,fast subsided stage,stable subsided stage,severe subsided stage and short time returning stage.Two third-order sequences(composed of five systems)were developed.During the initial fault stage,alluvial fan was main sedimentary system in the shallow water.The secondary porosity was developed because of diagenetic reconstruction.During the fast subsided stage and stable subsided stage,turbidite fan and fan delta were formed in deeper water.The initial porosity is well developed and well maintained.While during the severe subsided stage and the short time returning stage,the lacustrine basin sediment is severe again,braided river delta system is mainly developed and its initial porosity is grown.The responses of sedimentary are different at different lacustrine basin stages.

关 键 词：辽河西部凹陷 断陷湖盆 沉积演化 储层发育 

分 类 号：P618.13[天文地球—矿床学]