东营凹陷北部陡坡带西段水下扇体储集层特征  

The reservoir rocks of the subaqueous fans in the western segment of the steep slope zone of northern Dongying depression, Shandong

作　　者：徐晓晖[1] 许建华[2] 谢远军[3] 于会利 刘重玉[1] 

机构地区：[1]胜利油田有限责任公司滨南采油厂,山东滨州256606 [2]胜利油田有限责任公司地质科学研究院,山东东营257015 [3]胜利油田有限责任公司临盘采油厂山东临邑,251507 [4]胜利油田有限责任公司胜利采油厂,山东东营257000

出　　处：《沉积与特提斯地质》2003年第1期84-89,共6页Sedimentary Geology and Tethyan Geology

基　　金：中国石油化工集团公司"九五"重点科技项目"济阳坳陷特殊及隐蔽油气藏研究"

摘　　要：东营凹陷北部陡坡带发育多种类型的砂砾岩扇体,近年来一直是寻找隐蔽性油气藏的有利地区。其西段古近纪沙河街期四段时期形成以砂岩、砾岩为主的近岸水下扇沉积体。储集层岩石结构成熟度和成分成熟度均较低,多为双模态和复模态结构。本文首先从宏观上对储集层的岩石类型、沉积特征和平面分布进行描述,再从微观上对影响储集层物性的主要成岩作用进行描述,分析该砂砾岩体储集层的孔隙类型和孔隙结构特征。最后,对储层进行综合评价,认为该类储集层孔隙类型多样,孔隙结构复杂,为中低孔隙度、低渗透率储层类型。A variety of sandstone and conglomerate fans occur along the steep slope zone of northern Dongying depression, Shandong, a prospective area for the concealed oil and gas pools. These sandstone and conglomeratedominated nearshore fans were formed during the deposition of the fourth member of the Paleogene Shahejie Formation in the western segment of the slope zone. The reservoir rocks have lower textural maturity and compositional maturity and display bimodal or polymodal structures. The study of the porosity types and structures of the sandstone and conglomerate reservoirs on the basis of rock type, deposition, planar distribution and diagenesis shows that the reservoir rocks in the study area have moderate to low porosity and low permeability.

关 键 词：东营凹陷 油气藏 砂岩 砾岩 近岸水下扇沉积体 储集层 成熟度 孔隙结构 

分 类 号：P618.130.2[天文地球—矿床学]