陵水17-2深水气田黄流组重力流沉积特征及模式
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摘要
位于琼东南盆地中央峡谷的陵水17-2气田是我国海域自营勘探发现的第一个深水大气田,其储层主要为重力流沉积。基于研究区黄流组6口井的随钻电阻率成像测井、录井、地震、岩心和井壁取心等资料,通过岩心刻度成像资料实现全井段的岩性和沉积构造等成像地质刻度,并结合地震资料分析砂体分布和演化规律。结果表明:研究区黄流组主要发育块状构造-叠合层理、变形层理-块状构造、叠合层理-层状构造等3种沉积构造组合以及滑塌沉积、砂质碎屑流沉积、泥质碎屑流沉积和砂质浊流沉积等4种重力流沉积类型;主要发育轴向充填砂体、点砂坝、天然堤和水道充填砂体,其中研究区中段以点砂坝沉积为主,东段和西段以天然堤砂体为主;研究区重力流沉积受峡谷壁的限制作用,形成独特的多期弯曲水道沉积叠加的峡谷充填模式,其中点砂坝和天然堤砂体圈闭条件好、储层物性好,勘探潜力大。
LS17-2 gas field,located in Central Canyon area of Qiongdongnan Basin,is the first large deep water gas field discovered through self-operated exploration in the waters of China.Its reservoir is mainly formed due to gravity flow deposition.Based on the LWD resistivity imaging log,mud logging,seismic,core and wellbore coring of 6 wells in Huangliu Formation in the study area,imaging geological scale for the lithology and sedimentary tectonic of the whole well is achieved through the core scale imaging data,and analysis of the sand body distribution and evolution rule is carried out with the seismic data.The results show that Huangliu Formation in the study area is mainly composed of three sedimentary assemblages,namely massive structure-laminated bedding,deformed bedding-massive structure,laminated bedding-layered structure,and four kinds of gravity flow sedimentary types including slump sedimentation,sandy debris flow sedimentation,muddy debris flow sedimentation and turbidity flow sedimentation;mainly axially filled sand body,point bars,natural dike and channel filling sand body were developed,with middle section of study area dominated by point bars,and east and west sections dominated by natural dike sand bodies.The gravity flow deposition in the study area is restricted by the canyon wall,forming a unique canyon filling mode with superimposed multi-period meandering channel sedimentation,in which the point bar and the natural dike have favorable trapping conditions,good reservoir physical properties and great exploration potential.
LS17-2 gas field,located in Central Canyon area of Qiongdongnan Basin,is the first large deep water gas field discovered through self-operated exploration in the waters of China.Its reservoir is mainly formed due to gravity flow deposition.Based on the LWD resistivity imaging log,mud logging,seismic,core and wellbore coring of 6 wells in Huangliu Formation in the study area,imaging geological scale for the lithology and sedimentary tectonic of the whole well is achieved through the core scale imaging data,and analysis of the sand body distribution and evolution rule is carried out with the seismic data.The results show that Huangliu Formation in the study area is mainly composed of three sedimentary assemblages,namely massive structure-laminated bedding,deformed bedding-massive structure,laminated bedding-layered structure,and four kinds of gravity flow sedimentary types including slump sedimentation,sandy debris flow sedimentation,muddy debris flow sedimentation and turbidity flow sedimentation;mainly axially filled sand body,point bars,natural dike and channel filling sand body were developed,with middle section of study area dominated by point bars,and east and west sections dominated by natural dike sand bodies.The gravity flow deposition in the study area is restricted by the canyon wall,forming a unique canyon filling mode with superimposed multi-period meandering channel sedimentation,in which the point bar and the natural dike have favorable trapping conditions,good reservoir physical properties and great exploration potential.
引文
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[23]张道军,王亚辉,王振峰,等.琼东南盆地深水区中央峡谷沉积微相特征[J].沉积学报,2013,31(6):1114-1121.ZHANG Daojun,WANG Yahui,WANG Zhenfeng,et al.Characteristics of sedimentary microfacies in the Central Canyon within the deep water area,Qiongdongnan Basin[J].Acta Sedimentologica Sinica,2013,31(6):1114-1121.
[24]MAYALL M,JONES E,CASEY M.Turbidite channel reservoir:key elements in facies prediction and effective development[J].Marine and Petroleum Geology,2006,23(8):821-841.
[2]王振峰,裴健翔,郝德峰,等.莺-琼盆地中新统大型重力流储集体发育条件、沉积特征及天然气勘探有利方向[J].中国海上油气,2015,27(4):13-21.DOI:10.11935/j.issn.1673-1506.2015.04.002.WANG Zhenfeng,PEI Jianxiang,HAO Defeng,et al.Development conditions,sedimentary characteristics of Miocene large gravity flow reservoirs and the favorable gas exploration directions in Ying-Qiong basin[J].China Offshore Oil and Gas,2015,27(4):13-21.DOI:10.11935/j.issn.1673-1506.2015.04.002.
[3]张道军,王亚辉,赵鹏肖,等.南海北部琼东南盆地陵水段峡谷沉积建造及勘探意义[J].海洋学报,2015,37(2):25-35.ZHANG Daojun,WANG Yahui,ZHAO Pengxiao,et al.Sedimentary formation and exploration significance of the Lingshui Canyon system in the Qiongdongnan basin,northern South China Sea[J].Haiyang Xuebao,2015,37(2):25-35.
[4]李冬,徐强,王永凤,等.琼东南盆地中央峡谷西段充填体系沉积演化与砂体分布[J].石油地球物理勘探,2013,48(5):799-803.LI Dong,XU Qiang,WANG Yongfeng,et al.Filling evolution and sand distribution in the west part of Central Canyon,Qiongdongnan Basin[J].OGP,2013,48(5):799-803.
[5]解习农,陈志宏,孙志鹏,等.南海西北陆缘深水沉积体系内部构成特征[J].地球科学——中国地质大学学报,2012,37(4):627-634.XIE Xinong,CHEN Zhihong,SUN Zhipeng,et al.Depositional architecture characteristics of deep water depositional systems on the continental margins of Northwestern South China Sea[J].Earth Science—Journal of China University of Geoscience,2012,37(4):627-634.
[6]范彩伟,李绪深,刘昆,等.琼东南盆地乐东、陵水凹陷中新统岩性地层圈闭成藏条件[J].中国海上油气,2016,28(2):53-59.DOI:10.11935/j.issn.1673-1506.2016.02.006.FAN Caiwei,LI Xushen,LIU Kun,et al.Hydrocarbon accumulation condition of Miocene litho-stratigraphic trap in Ledong&Lingshui sags,Qiongdongnan basin[J].China Offshore Oil and Gas,2016,28(2):53-59.DOI:10.11935/j.issn.1673-1506.2016.02.006.
[7]胡杨,张伟,张景茹,等.南海北部大陆边缘琼东南盆地有利油气聚集带及勘探方向[J].海洋地质与第四纪地质,2015,35(4):73-85.HU Yang,ZHANG Wei,ZHANG Jingru,et al.The favorable petroleum accumulation belts and exploration targets in Qiongdongnan basin on the margin of northern South China Sea[J].Marine Geology&Quaternary Geology,2015,35(4):73-85.
[8]张伟,何家雄,李晓唐,等.南海北部大陆边缘琼东南盆地含油气系统[J].地球科学与环境学报,2015,37(5):80-92.ZHANG Wei,HE Jiaxiong,LI Xiaotang,et al.Petroleum system in Qiongdongnan Basin of the continental margin,the northern South China Sea[J].Journal of Earth Sciences and Environment,2015,37(5):80-92.
[9]许怀智,蔡东升,孙志鹏,等.琼东南盆地中央峡谷沉积充填特征及油气地质意义[J].地质学报,2012,86(4):641-650.XU Huaizhi,CAI Dongsheng,SUN Zhipeng,et al.Filling characters of Central Submarine Canyon of Qiongdongnan Basin and its significance of petroleum geology[J].Acta Geologica Sinica,2012,86(4):641-650.
[10]STANDEN E,GANEM H,MATHIS B,et al.Core orientation and calibration of borehole image data[J].Well Log Interpretation,2010,66(2):84-90.
[11]侯方浩,薛叔浩,李应暹.中国油气储层研究图集(卷四)沉积构造[M].北京:石油工业出版社,1994.
[12]DRIBUS J R.Consideration of the origin and characteristics of turbidite sediments[J].Petrophysics,2014,55(2):88-95.
[13]高红灿,郑荣才,魏钦廉,等.碎屑流与浊流的流体性质及沉积特征研究进展[J].地球科学进展,2012,27(8):815-827.GAO Hongchan,ZHENG Rongcai,WEI Qinlian,et al.Reviews on fluid properties and sedimentary characteristics of debris flows and turbidity currents[J].Advances in Earth Science,2012,27(8):815-827.
[14]SHANMUGAM G.High-density turbidity currents:are they sandy debris flows?[J].Journal of Sedimentary Research,1996,66(1):2-10.
[15]SHANMUGAM G,BLOCH R B,MITCHELL S M.Basin-floor fans in the North Sea:Sequence stratigraphic models vs.sedimentary facies[J].AAPG Bulletin,1995,79(4):477-512.
[16]韩作振,刘凤武,高丽华,等.惠民凹陷临北断阶沙三中亚段砂质碎屑流沉积特征[J].山东科技大学学报(自然科学版),2016,35(2):1-7.HAN Zuozhen,LIU Fengwu,GAO Lihua,et al.Sandy debris-flow sedimentary characteristics of middle-Es3in Linbei step fault zone of Huimin depression[J].Journal of Shandong University of Science and Technology(Natural Science),2016,35(2):1-7.
[17]SHANMUGAM G.50 years of the turbidite paradigm(1950s-1990s):deep-water processes and facies models—a critical perspective[J].Marine and Petroleum Geology,2000,17(2):285-342.
[18]SHANMUGAM G.Deep-water processes and facies models:implications for sandstone petroleum reservoirs[M].NewYork:Elsevier,2006.
[19]李林,曲永强,孟庆任,等.重力流沉积:理论研究与野外识别[J].沉积学报,2011,29(4):677-688.LI Lin,QU Yongqiang,MENG Qingren,et al.Gravity flow sedimentation:the theoretical studies and field identification[J].Acta Sedimentologica Sinica,2011,29(4):677-688.
[20]SHANMUGAM G.Ten turbidite myths[J].Earth-Science Reviews,2002,58(3):311-341.
[21]MULDER T,ALEXANDER J.The physical character of subaqueous sedimentary density flows and their deposits[J].Sedimentology,2001,48(2):269-299.
[22]DASGUPTA P.Sediment gravity flow:the conceptual problems[J].Earth Science Reviews,2003,62:265-281.
[23]张道军,王亚辉,王振峰,等.琼东南盆地深水区中央峡谷沉积微相特征[J].沉积学报,2013,31(6):1114-1121.ZHANG Daojun,WANG Yahui,WANG Zhenfeng,et al.Characteristics of sedimentary microfacies in the Central Canyon within the deep water area,Qiongdongnan Basin[J].Acta Sedimentologica Sinica,2013,31(6):1114-1121.
[24]MAYALL M,JONES E,CASEY M.Turbidite channel reservoir:key elements in facies prediction and effective development[J].Marine and Petroleum Geology,2006,23(8):821-841.