惠民凹陷大芦家地区沙—中亚段沉积特征及储层评价  

Sedimentary Characteristics and Reservoir Evaluation in the Middle Part of the First Member of the Shahejie Formation,Dalujia Area,Huimin Sag

作　　者：刘佳庚 王艳忠[1] 操应长[1] 孙沛沛 何旭豪 何瑞武 郭迎春 LIU JiaGeng;WANG YanZhong;CAO YingChang;SUN PeiPei;HE XuHao;HE RuiWu;GUO YingChun(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Geophysical Research Institute of Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257000,China;Linpan Oil Production Plant of Shengli Oilfield Company,SINOPEC,Dezhou,Shandong 251507,China;Exploration and Development Research Institute of Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257000,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油化工股份有限公司胜利油田分公司物探研究院,山东东营257000 [3]中国石油化工股份有限公司胜利油田分公司临盘采油厂,山东德州251507 [4]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257000

出　　处：《沉积学报》2023年第3期855-866,共12页Acta Sedimentologica Sinica

基　　金：国家科技重大专项(2016ZX05006-003)。

摘　　要：惠民凹陷大芦家地区沙一中亚段发育三角洲—碳酸盐岩滩坝沉积,储层研究十分薄弱,严重制约了该区油气勘探进展。通过三维地震解释、测录井分析、物性测试、岩心及薄片观察,结合Petrel三维显示模块,对沙一中亚段沉积特征及储层质量进行系统研究。沙一中亚段发育三角洲和碳酸盐岩滩坝沉积,碳酸盐岩滩坝又包括颗粒滩和灰泥滩;三角洲发育在南部和北部地区,中部发育碳酸盐岩滩坝,灰泥滩在颗粒滩外围发育;临邑断层下降盘的滚动背斜控制了中部碳酸盐岩滩坝的展布,派生断层F1及滚动背斜控制了南部三角洲的展布,临2断层、临14断层及滚动背斜控制了北部三角洲的走向;准层序组一沉积时期,碎屑物源供应充足,北部、南部三角洲砂体发育规模大,向中部滚动背斜带过渡为碳酸盐岩滩坝;准层序组二沉积时期,水体加深,物源后退,碎屑物源供应减少导致北部、南部三角洲砂体范围减小,中部滚动背斜带碳酸盐岩滩坝范围增加。三角洲水下分流河道和碳酸盐岩颗粒滩微相物性最好,成岩相主要为中—弱压实、弱胶结、中—弱溶解组合,储集空间以原生孔为主,为最有利的储层;灰泥滩微相物性次之,成岩相以强压实相为主,微孔隙贡献了储层主要储集空间,为中等有利的储层;河口坝微相物性最差,成岩相主要为强压实、弱胶结、弱溶解组合,储集空间只有少量颗粒溶孔,为较差的储层。The sedimentary characteristics and reservoir quality of the deltas and carbonate beach bars in the middle part of the First member of the Shahejie Formation(Es_1~z) in the Dalujia area of the Huimin Sag have rarely been studied,severely hindering petroleum and gas exploration.This systematic examination of the region used 3D seismic interpretation,well logging,petrophysical tests and core and thin-section observation in combination with 3D geological modeling by Petrel software.Deltas and carbonate beach bars occur in the Es_1~z,which also comprises carbonate grain beaches and carbonate mud beaches.Deltas and carbonate beaches are developed in the southern and northern Dalujia area.Carbonate mud beaches surround carbonate grain beaches in the central region.Carbonate beach bars in the central region are associated with a rolling anticline in the downthrow block of the Linyi fault.Another fault(called F1),along with the rolling anticline,limits the range of the southern delta.The Lin2 and Lin14 faults form the Linyi fault,which together with the rolling anticline determine the orientation of the northern delta.During a period of forming the lower parasequence set,the debris supply was sufficient to enable growth of the two deltas and to transport sedimentary facies to the carbonate beach bars in the direction of the central rolling anticline.When the parasequence set was deposited,the deepening lake basin and receding provenance of rock debris reduced the scales of the two deltas and increased the range of the carbonate beach bars on the rolling anticline.The most favorable hydrocarbon reservoirs with predominantly primary porosity occur in subaqueous distributary channels and carbonate grain beaches that have a diagenetic assemblage of moderate to weak compaction,weak cementation and moderate to weak dissolution.The carbonate mud beaches have formed moderately favorable reservoirs,having micropores as the main reservoir space,but with strong compactive diagenetic facies.Estuary dams are the least favorable reser

关 键 词：沉积演化 储层评价 临邑断层 滚动背斜 沙一中亚段 大芦家地区 

分 类 号：P618.13[天文地球—矿床学]