南堡凹陷一号构造带东营组三段下亚段的沉积相与输砂模式
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摘要
针对南堡一号东营组三段下亚段的一号断层两侧的差异和物源方向认知不匹配的问题,运用岩芯、测井、重矿物、构造、地震剖面、地震属性等资料,研究一号构造带的物源与沉积特征。结果表明,一号构造带发育滨浅湖、辫状河三角前缘沉积相。主断裂不控制沉积展布,断裂两侧发育两支物源,输砂模式不同。西侧三角洲沉积为挠曲坡折控砂,延伸较短,形成舌状三角洲;东侧三角洲沉积为多级断阶坡折控砂,物源延伸较长,形成鸟足状三角洲。一号构造带三角洲水下分流河道与河口坝为优质储层,与构造叠合形成的构造-岩性圈闭发育区可作为该区下一步油气勘探的重点区域。
This paper is concerned with an investigation into the provenance and sedimentary characteristics of No. 1 structural belt using data gleamed from core,logging,heavy minerals,structures,seismic profiles,and seismic attributes,in response to greater differences between traps and reservoirs development and the mismatch between these differences and provenance direction cognition,such as occurs on both sides of No. 1 fault in the lower section of the third section of the Dongying formation in the No. 1 structural belt of Nanpu sag. The results show that the No. 1 structural belt develops sedimentary facies of shore-shallow lake and braided river delta front. The main faults do not control the distribution of deposits,contributing to the development of two provenances on both sides of the faults,governed by different sand transport modes. The delta deposits on the west side are underlain by a sand control mode of flexural slope,with a relatively short extension,resulting in the formation of a lobate delta,and the eastern delta deposits are governed by a sand control mode of multi-level fault slope,with a longer extension and consequently the formation of a bird-foot delta. The underwater distributary channels and estuary dams in the delta of No. 1 structural belt are high-quality reservoirs and structural-lithologic reservoirs resulting from superimposition with structures may be the key areas for potential oil and gas exploration in this area.
This paper is concerned with an investigation into the provenance and sedimentary characteristics of No. 1 structural belt using data gleamed from core,logging,heavy minerals,structures,seismic profiles,and seismic attributes,in response to greater differences between traps and reservoirs development and the mismatch between these differences and provenance direction cognition,such as occurs on both sides of No. 1 fault in the lower section of the third section of the Dongying formation in the No. 1 structural belt of Nanpu sag. The results show that the No. 1 structural belt develops sedimentary facies of shore-shallow lake and braided river delta front. The main faults do not control the distribution of deposits,contributing to the development of two provenances on both sides of the faults,governed by different sand transport modes. The delta deposits on the west side are underlain by a sand control mode of flexural slope,with a relatively short extension,resulting in the formation of a lobate delta,and the eastern delta deposits are governed by a sand control mode of multi-level fault slope,with a longer extension and consequently the formation of a bird-foot delta. The underwater distributary channels and estuary dams in the delta of No. 1 structural belt are high-quality reservoirs and structural-lithologic reservoirs resulting from superimposition with structures may be the key areas for potential oil and gas exploration in this area.
引文
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[18] Yu C. Fracture system types and their control ling actions on thereservoir formation in Nanpu sag[J]. Petroleum Geology&Oil-field Development in Daqing,2016,28(4):32-36.
[19]王观宏.南堡凹陷东营组堆积期构造活动的“双强效应”及其对沉积的控制[D].武汉:中国地质大学,2016.
[20]万锦峰,鲜本忠,李振鹏,等.南堡凹陷滩海地区不同级别断裂活动及其对沉积的影响[J].沉积学报,2013,31(6):1059-1069.
[21] Sun T W,Fu G,LüY F,et al. Main controlling factors on thehydrocarbon accumulation in the middle-shallow layer of 1ststructure,Nanpu sag[J]. Natural Gas Geoscience,2014,25(7):1042-1051.
[2]苗顺德,李秋芬,梁建设,等.南堡凹陷东营组高精度层序地层格架及沉积体系分析[J].吉林大学学报(地球科学版),2011,41(S1):61-68.
[3]郭泽清,刘卫红,张林,等.中国陆相岩性地层油气藏分布规律和控制因素研究进展[J].地质科技情报,2009,28(5):71-77.
[4]郭少斌.陆相断陷盆地层序类型及隐蔽圈闭预测[J].地质科技情报,2006(5):15-20.
[5] Lu Y,Wei D,Sun Y,et al. Control action of faults on hydrocar-bon migration and accumulation in the middle and upper oil-bear-ing group in Nanpu sag[J]. Journal of Jilin University,2015,45(4):971-982.
[6] Liu X F,Zhang C M. Nanpu sag of the Bohai Bay Basin:a tran-stensional Fault-Termination Basin[J]. Journal of Earth Science,2011,22(6):755-767.
[7]王明春,李德郁,张海义,等.渤海西部沙北构造带断裂特征及其对沉积的控制作用[J].岩性油气藏,2015,7(5):167-171.
[8]赵迎冬,张永超,王全利,等.南堡凹陷物源体系发育特征与优质储层形成[J].地质科技情报,2018,37(1):128-134.
[9]李梦瑶.南堡凹陷古近系物源及沉积体系研究[D].青岛:中国石油大学(华东),2014.
[10]夏景生,刘晓,李文华,等.南堡凹陷西斜坡中深层高精度层序地层及沉积体系研究[J].中国石油勘探,2017,22(5):72-81.
[11]姜华,王华,林正良,等.南堡凹陷古近纪幕式裂陷作用及其对沉积充填的控制[J].沉积学报,2009,27(5):976-982.
[12] Xu A N,Dong Y X,Han D K,et al. Integrated description andevaluation of reservoirs based on seismic,logging,and geologicaldata:taking Dongying Formation member 1 oil reservoir of No. 1structure,Nanpu Sag as an example[J]. Petrol Explor Dev,2009,36(1):541-551.
[13]卿颖,张敬艺,汪浩源,等.南堡凹陷高南斜坡古近系岩性油藏勘探实践[J].特种油气藏,2013,20(6):48-51.
[14]万涛,蒋有录,董月霞,等.南堡凹陷1号构造带油气成藏研究[J].石油天然气报,2011,33(8):26-30.
[15]夏景生,刘晓涵,王政军,等.渤海湾盆地南堡凹陷西部东营组三段—沙河街组一段砂质碎屑流沉积特征及油气勘探意义[J].石油学报,2017,38(4):399-413.
[16]董月霞,张宁,周海民,等.南堡凹陷油田古近系碎屑重矿物的物源和构造意义[J].地质科技情报,2008,32(5):7-13.
[17]王华,姜华,林正良,等.南堡凹陷东营组同沉积构造活动性与沉积格局的配置关系研究[J].地球科学与环境学报,2011,33(1):70-77.
[18] Yu C. Fracture system types and their control ling actions on thereservoir formation in Nanpu sag[J]. Petroleum Geology&Oil-field Development in Daqing,2016,28(4):32-36.
[19]王观宏.南堡凹陷东营组堆积期构造活动的“双强效应”及其对沉积的控制[D].武汉:中国地质大学,2016.
[20]万锦峰,鲜本忠,李振鹏,等.南堡凹陷滩海地区不同级别断裂活动及其对沉积的影响[J].沉积学报,2013,31(6):1059-1069.
[21] Sun T W,Fu G,LüY F,et al. Main controlling factors on thehydrocarbon accumulation in the middle-shallow layer of 1ststructure,Nanpu sag[J]. Natural Gas Geoscience,2014,25(7):1042-1051.
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