高尚堡油田沙三^3亚段储层发育特征  

Reservoir characteristics of Es3^3 in Gaoshangpu oilfield

作　　者：李业会[1] 齐立新[1] 夏秋君[1] 杨竞旭[1] 陈少勇[1] 曹同锋[1] 

机构地区：[1]中国石油冀东油田分公司,河北唐山063004

出　　处：《中国矿业》2014年第9期83-88,共6页China Mining Magazine

摘　　要：高尚堡油田沙三3储层主要为一套长石岩屑砂岩及岩屑长石砂岩,具有低成分成熟度和结构成熟度、近源快速堆积的特点。该套储层先后经历了压实作用和压溶作用、胶结作用、溶蚀作用、自生矿物的充填作用、交代作用和破裂作用改造,其中早期绿泥石的环边胶结作用、有机酸热液的溶蚀作用及破裂作用对储层具有建设性,压实-压溶作用是导致储层物性快速变差的主要原因,碳酸盐的胶结交代、硅质胶结、黏土矿物胶结及自生矿物的充填作用对储层具有一定伤害性。研究表明,高尚堡油田沙三3储层目前主要处于中成岩阶段,不同成因类型的孔隙为其主要的储集空间,储层孔、渗具有良好的相关性,主要发育孔隙型中低孔—低渗型储层,储层物性有随埋深加大而逐渐变差的趋势,埋深较浅的(水下)分流河道发育区是最有利的储集相带。The reservoirs in the lower unit of the third member of Eocene Shahejie Formation （E3^3） in Gaoshangpu oil field mainly consist of feldspathic litharenites and lithic arkoses sandstones with the characteristics of low compositional maturity,low textural maturity and rapidly proximal deposit. Important diagenetic processes that have affected the sandstones include mechanical and chemical compaction, cementation, dissolution, precipitation of authigenic minerals, replacement, and cataclasis. Generally, early grain-coating chlorite and dissolution associated with organic acids and/or thermal fluids, as well as cataclasis,are constructive diagenesis for reservoir quality, whereas compaction is the major factors that destroy the porosity rapidly. In addition, carbonate cements and replacements, quartz cements and anthigenic clay minerals are the destructive diagenesis for the reservoir quality. This study indicated that the E3^3 sandstones are present in the middle diagenetic stage. The space of the reservoirs is composed of the multiple-genetic pores （primary and secondary） that formed from different stages. The reservoir quality with middle-low porosity and low permeability are decrease with depths. A well correlation between porosity and permeability suggest that the sandstones are pore-type reservoirs. The shallow burial （underwater） distributary channel sandbodies would be the most favorable targets for oil and gas exploration in the future.

关 键 词：储层特征 成岩作用 溶蚀作用 沙三段 高尚堡油田 

分 类 号：P618.1[天文地球—矿床学]