扇三角洲沉积微相与有利储层的关系——以青东凹陷青东5块沙四上沉积为例
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摘要
为研究不同沉积特征对储层发育的影响,利用测井、录井、分析化验资料以及岩心观察,通过点、线、面沉积相综合分析对比,确定研究区内存在三种沉积亚相扇三角洲前缘、扇三角洲平原、前三角洲。通过对比岩性、电性及沉积特征,进一步识别划分出九种沉积微相。对研究区内扇三角洲各沉积微相的沉积特征、纵横向展布规律进行研究,统计受沉积微相控制的储集层孔隙度、渗透率等物性数据,并结合各沉积微相的含油气性特征,指出水下分流河道微相及河口沙坝微相储集物性最好,并聚集了69.8%的的油气,为最有利的油气聚集微相。前缘席状砂微相、沙坝微相、沙滩微相及碳酸盐岩滩微相储集物性较好,属于中孔-中渗储层,为研究区的重要油气聚集微相。在前人确定研究区为扇三角洲沉积的基础上,将研究区内沉积相进一步划分至亚相与微相,并分析了不同亚相控制下的储层物性及含油性,为扇三角洲型油气勘探开发提供了依据。
To study the influence of different sedimentary characteristics on reservoir development,a comprehensive analysis of sedimentary facies is carried out by using the logging data,testing data,and by observing rock core.Three kinds of sedimentary sub-facies were determined in the targeted geographical area.Nine kinds of sedimentary microfacies were further identified by comparing the lithological,electrical and sedimentary characteristics.The sedimentary characteristics and distribution law of the sedimentary microfacies in the fan-delta were studied,and the physical data of porosity and permeability of the reservoir controlled by the sedimentary microfacies were counted.Based on the sedimentary microfacies oil-gas characteristics,it was found that the underwater distributary channel microfacies and mouth-bar microfacies have the best reservoir physical property.The most favorable oil and gas gathering microfacies is resulted up to 69.8%.With good physical properties and being part of the middle pore-middle permeability reservoir,the leading edge sheet sand microfacies,sand bar microfacies,sand beach microfacies and carbonate rock beach microfacies were the major oil and gas accumulation microfacies in the targeted area.The fan-deltaic sedimentary facies were further divided to sub-facies and microfacies and the physical and oil properties of the reservoir controlled by different sub-facies were analyzed.The study in this paper provides reference for future fan-deltaic oil and gas exploration and development.
To study the influence of different sedimentary characteristics on reservoir development,a comprehensive analysis of sedimentary facies is carried out by using the logging data,testing data,and by observing rock core.Three kinds of sedimentary sub-facies were determined in the targeted geographical area.Nine kinds of sedimentary microfacies were further identified by comparing the lithological,electrical and sedimentary characteristics.The sedimentary characteristics and distribution law of the sedimentary microfacies in the fan-delta were studied,and the physical data of porosity and permeability of the reservoir controlled by the sedimentary microfacies were counted.Based on the sedimentary microfacies oil-gas characteristics,it was found that the underwater distributary channel microfacies and mouth-bar microfacies have the best reservoir physical property.The most favorable oil and gas gathering microfacies is resulted up to 69.8%.With good physical properties and being part of the middle pore-middle permeability reservoir,the leading edge sheet sand microfacies,sand bar microfacies,sand beach microfacies and carbonate rock beach microfacies were the major oil and gas accumulation microfacies in the targeted area.The fan-deltaic sedimentary facies were further divided to sub-facies and microfacies and the physical and oil properties of the reservoir controlled by different sub-facies were analyzed.The study in this paper provides reference for future fan-deltaic oil and gas exploration and development.
引文
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[14]时丕同,方旭庆,陈涛,等.青东凹陷石油地质特征和勘探方向分析[J].西南石油大学学报(自然科学版),2009,31(5):43-48.SHI Peitong,FANG Xuqing,CHEN Tao,et al.Petroleum geologic characteristic and prospecting target in Qingdong sag[J].Journal of Southwest Petroleum University,2009,31(5):43-48.
[15]王勇,钟建华.湖盆扇三角洲露头特征及与油气的关系[J].油气地质与采收率,2010,17(3):6-11.WANG Yong,ZHONG Jianhua.Lake basin fan-delta outcrop features and its relationship with oil and gas[J].Petroleum Geology and Recovery Efficiency,2010,17(3):6-11.
[16]XU F,ZHANG P H,ZHANG J L,et al.Diagenesis and diagenetic evolution of deltaic and neritic gas-bearing sandstones in the Lower Mingyuefeng formation of Paleogene,Lishui sag,East China Sea Shelf basin:Implications for depositional environments and sequence stratigraphy controls[J].Acta Geologica Sinica,2015,89(5):1625-1635.
[17]YANG R C,FAN A P,VAN LOON A J,et al.Depositional and diagenetic controls on sandstone reservoirs with low porosity and low permeability in the Eastern Sulige gas field,China[J].Acta Geologica Sinica,2014,88(5):1513-1534.
[18]陈春强,樊太亮,吴丽艳,等.扇三角洲沉积微相特征与储集层“四性”的关系-以泌阳凹陷安棚油田为例[J].石油天然气学报(江汉石油学院学报),2005,27(4):11-13.
[19]SULLIVAN K B,MCBRIDE E F.Diagenesis of sandstones at shale contacts and diagenetic formation[J].AAPG Bulletin,1991,75(1):121-138.
[2]明海会,金振奎,周新科.安棚油田核三段沉积相与油气分布关系[J].新疆石油地质,2005,26(4):389-392.MING Haihui,JIN Zhenkui,ZHOU Xinke.Sedimentary facies of No.3section of Hetaoyuan formation and hydrocarbon distribution in Anpeng oilfield[J].Xinjiang Petroleum Geology,2005,26(4):389-392.
[3]李守军,刘强,张明星,等.义北油田大43块沙四上亚段沉积微相研究[J].沉积与特提斯地质,2017,37(1):34-40.LI Shoujun,LIU Qiang,ZHANG Mingxing,et al.Sedimentary microfacies in the period of the fourth member of Shahejie formation D43Block in Yibei oilfield[J].Sedimentary Geology and Tethyan Geology,2017,37(1):34-40.
[4]李守军,王德健,闫法堂,等.义北油田大43块沙四段滩坝砂体沉积微相及储层分布研究[J].山东科技大学学报(自然科学版),2018,37(3):1-10.LI Shoujun,WANG Dejian,YAN Fatang,et al.Sedimentary microfacies and reservoir distribution of beach-bar sandbodies of the fourth member of Shahejie formation D43block in Yibei oilfield[J].Journal of Shandong University of Science and Technology(Natural science),2018,37(3):1-10.
[5]丁玉盛,周巨标,石先达,等.王龙庄油田阜宁组二段碳酸盐岩石与碎屑岩混合沉积滩坝体系[J].山东科技大学学报(自然科学版),2015,34(2):58-63.DING Yusheng,ZHOU Jubiao,SHI Xianda,et al.Beach bar system mixed carbonate and siliciclastic sediments in the second member of Funing formation in Wanglongzhuang oilfield[J].Journal of Shandong University of Science and Technology(Natural Science),2015,34(2):58-63.
[6]杨剑萍,石德文.东营凹陷北部永921地区渐新世沙三段和沙四段扇三角洲沉积[J].石油大学学报,2000,26(1):10-12.YANG Jianping,SHI Dewen.Fan delta deposits of Sha-3and Sha-4members at Oligocene Shahejie formation at Yong 921area in the north of Dongying depression[J].Journal of the University of Petroleum,2000,26(1):10-12.
[7]KASSAB M A,ABU HASHISH M F,NABAWY B S.Effect of kaolinite as a key factor controlling the petrophysical properties of the Nubia sandstone in central Eastern Desert,Egypt[J].Journal of African Earth Sciences,2017,125:103-117.
[8]许晓凤.济阳坳陷青东凹陷沙河街组四段上亚段沉积体系研究[J].长江大学学报,2016,13(32):24-31XU Xiaofeng.Sedimentary system the Esu4of Shahejie formation of Qingdong sag in Jiyang depression[J].Journal of Yangtze University,2016,13(32):24-31.
[9]孙志勇.青东5块Es4上亚段储层特征及控制因素研究[J].石油地质与工程,2013,27(1):17-22SUN Zhiyong.Research on Es4upper member reservoir characteristics and controlling factors analysis in Qingdong 5block[J].Petroleum Geology and Engineering,2013,27(1):17-22.
[10]王伟,吴奎,张中巧,等.青东凹陷沙河街组三、四段储层成岩作用及孔隙演化[J].矿物岩石,2012,32(3):94-102.WANG Wei,WU Kui,ZHANG Zhongqiao,et al.Diagenesis and porosity evolution of reservoir of the 3th,4th member of Shahejie formation in Qingdong sag[J].Journal of Mineralogy and Petrology,2012,32(3):94-102.
[11]李桂范,李建平,王根照,等.渤中坳陷青东凹陷古近系沙三下亚段构造-古地貌对沉积的控制[J].石油与天然气地质,2009,30(4):425-430.LI Guifan,LI Jianping,WANG Genzhao,et al.Control of structure-paleogeomorphology on the deposition of the lower part of the third member of the Paleogene Shahejie formation in the Qingdong sag of the Bozhong depression[J].Oil&Gas Geology,2009,30(4):425-430.
[12]周子群,赵丽平,徐梅.青东凹陷构造特征及构造样式分析[J].内蒙古石油化工,2012(9):148-149.ZHOU Ziqun,ZHAO Liping,XU Mei.The analysis of the structure characteristics and style in Qingdong depression[J].Inner Mongolia Petrochemical Industry,2012(9):148-149.
[13]李春荣,刘豪,辛仁臣,等青东凹陷断裂特征及其对沉积的控制作用[J].海洋石油,2012,32(1):13-17.LI Chunrong,LIU Hao,XIN Renchen,et al.Characteristics of faults and its control on sedimentation in Qingdong depression[J].Offshore Oil,2012,32(1):13-17.
[14]时丕同,方旭庆,陈涛,等.青东凹陷石油地质特征和勘探方向分析[J].西南石油大学学报(自然科学版),2009,31(5):43-48.SHI Peitong,FANG Xuqing,CHEN Tao,et al.Petroleum geologic characteristic and prospecting target in Qingdong sag[J].Journal of Southwest Petroleum University,2009,31(5):43-48.
[15]王勇,钟建华.湖盆扇三角洲露头特征及与油气的关系[J].油气地质与采收率,2010,17(3):6-11.WANG Yong,ZHONG Jianhua.Lake basin fan-delta outcrop features and its relationship with oil and gas[J].Petroleum Geology and Recovery Efficiency,2010,17(3):6-11.
[16]XU F,ZHANG P H,ZHANG J L,et al.Diagenesis and diagenetic evolution of deltaic and neritic gas-bearing sandstones in the Lower Mingyuefeng formation of Paleogene,Lishui sag,East China Sea Shelf basin:Implications for depositional environments and sequence stratigraphy controls[J].Acta Geologica Sinica,2015,89(5):1625-1635.
[17]YANG R C,FAN A P,VAN LOON A J,et al.Depositional and diagenetic controls on sandstone reservoirs with low porosity and low permeability in the Eastern Sulige gas field,China[J].Acta Geologica Sinica,2014,88(5):1513-1534.
[18]陈春强,樊太亮,吴丽艳,等.扇三角洲沉积微相特征与储集层“四性”的关系-以泌阳凹陷安棚油田为例[J].石油天然气学报(江汉石油学院学报),2005,27(4):11-13.
[19]SULLIVAN K B,MCBRIDE E F.Diagenesis of sandstones at shale contacts and diagenetic formation[J].AAPG Bulletin,1991,75(1):121-138.
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