操应长,张少敏,王艳忠,马奔奔,宋丙慧
CAO Yingchang,ZHANG Shaomin,WANG Yanzhong,MA Benben,SONG Binghui

• 1:中国石油大学地球科学与技术学院

摘要(Abstract)：

运用岩心观察、薄片鉴定、岩石物性测试等多种方法,对渤南洼陷北带沙四上亚段近岸水下扇砂砾岩储层的岩相—成岩相组合、储层物性进行了研究。认为近岸水下扇砂砾岩发育杂基支撑砾岩、颗粒支撑砾岩、砾质砂岩、含砾砂岩、砂岩、泥岩等6种岩相,发育强压实—杂基重结晶、强压实、强溶解、强胶结、过渡类等5种成岩相,主要有颗粒支撑砾岩相—强压实弱溶解弱胶结成岩相、含砾砂岩相—中等压实强溶解弱胶结成岩相、砂岩相—中等压实弱溶解强胶结成岩相等11种岩相—成岩相组合;近岸水下扇砂砾岩为低孔、低渗储层,扇根物性差,以特低孔、超低渗储层为主,形成封堵层,扇中距砂泥接触面较远位置的岩相组合的底部物性较差,中部物性较好,以低孔、特低渗储层为主,形成储集层;扇中距砂泥接触面距离较近的位置和扇缘亚相物性差,形成遮挡层。
Comprehensively utilizing the methods of the core observation,thin section identification,test of the rock physical properties and so on,the lithofacies-diagenetic facies combination and physical properties of the nearshore subaqueous fan reservoirs in the upper subsag of Member 4 of Shahejie Formation(Es4s) in North Belt of Bonan Sag are studied.The researches show that six kinds of lithofacies are developed in the glutenite of this type of the fans;matrix-supporting conglomerate,particle-supporting conglomerate,calculous sandstone,gravel-bearing sandstone,sandstone and mudstone facieses;and moreover five kinds of diagenetic facies are developed,for instance strong compaction-matrix recrystallization,strong compaction,intense dissolution,tight cementation and transition diagenetic facieses;eleven kinds of the lithofacies-diagenetic facies combinations are mainly formed;particle-supporting conglomerate facies-strong compaction-weak dissolution/cementation diagenetic facies,gravel-bearing sandstone facies-moderate compaction-intense dissolution-weak cementation diagenetic facies,sandstone faciesmoderate compaction-weak dissolution-tight cementation diagenetic facies and so on.The low-porosity and low-permeability reservoirs are presented in the conglomerate fans,the physical properties in the fan root are poor and the roots are characterized by extra-low-porosity and extra-low-permeability reservoirs,thus the plugging layers are generated;the physical properties in the bottom of lithofacies combination of the middle fans far away from the sandmud contact profile are relatively poorer,the properties in the middle part are pretty better,the generated reservoirs are mainly characterized by low-porosity and extra-low-permeability reservoirs,while the properties in both the location near to the contact profile for the fan middle part and subfacies of the fan edge are poorer,therefore the barriers are formed.

关键词(KeyWords)： 渤南洼陷;近岸水下扇;储层;岩相—成岩相组合;物性特征;砂砾岩
Bonan Sag;nearshore subaqueous fans;reservoir;lithofacies-diagenetic facies combination/assemblage;physical property characteristic;glutenite

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“济阳坳陷低渗透储层有效性量化预测”(2011ZX05006-003)资助

作者(Author): 操应长,张少敏,王艳忠,马奔奔,宋丙慧
CAO Yingchang,ZHANG Shaomin,WANG Yanzhong,MA Benben,SONG Binghui

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