安徽望江—潜山盆地碎屑岩储层特征  

Characteristics of clasolite reservoir at Wangjiang—Qianshan basin

作　　者：郭双亭[1] 何明喜[1] 周建文[1] 杜建波[1] 曹建康[1] 谢其锋[1] 

机构地区：[1]中国石化河南油田分公司石油勘探开发研究院,河南南阳473132

出　　处：《石油地质与工程》2008年第4期23-26,共4页Petroleum Geology and Engineering

基　　金：中国石油化工股份有限公司科技项目(P02039)

摘　　要：望江-潜山盆地碎屑岩储层在各个层系中均有发育,其中海相碎屑岩多分布于各个旋回的底部,是各个旋回频繁海侵和海退的产物。岩石类型主要为砂岩,包括粗砂岩、中砂岩、细砂岩和粉砂岩,很少发育砾岩。砂岩分选中等—好,磨圆以次棱状为主,岩石类型主要为岩屑砂岩、次长石岩屑砂岩、岩屑砂岩和少量石英砂岩,泥质杂基含量较少。碎屑岩储层成岩阶段可划分为早成岩期、晚成岩期和表生成岩期。碎屑岩储层物性特征为低孔—低渗和特低孔—特低渗储层。储层储集性能由好到差依次为:古近纪、坟头组、龙潭组、黄马青组、钟山组、清水组、高家边组、五通组及周冲村组。Clasolite reservoirs are deposited widely in all strata at Wangjiang-Qianshan basin,of which the clasolite of marine facies are occurred at the bottom of each cycles,resulting from frequent transgressions and regressions.In terms of granularity,rock types are mainly sandstone,including coarse sandstone,medium sandstone,fine sandstone and siltstone,with scarcely conglomerates.Statistics show that the sandstones are medium-well sorted and sub-prism as the main rounding style.In terms of chemical composition, rock types mainly include lithic sandstone,sub-feldspar lithic sandstone and a few of quartz sandstone,with little pelitic matrix.The diagenetie stages of clasolite reservoir di- agenetic stages can be classified into early diagenetic phase, late diagenetic phase and epidiagenetic phase.The physical properties of clasolite reservoir are characterized by low po- rosity—low permeability and extremely low porosity—extremely low permeability.The storage and preservation capability of reservoirs are ordered from good to poor as fol- lows:Paleogene(E),Fentou Group (S2f),Longtan Group (P31),Huangmaqing Group(T2h),Zhongshan Group(J1z). Qingshui Group (S1q),Gaojiabian Group(S1g),Wutong Group(D3C1w) and Zhouchongcun Group(T2z).

关 键 词：储层特征 成岩作用 储集性能 构造演化 望江-潜山 

分 类 号：TE112.23[石油与天然气工程—油气勘探]