歧南断阶带沙一段重力流类型及勘探潜力分析
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摘要
以岩心、测井、地震及分析化验资料为基础,对歧南断阶带沙一段重力流沉积形成机制、识别特征及沉积模式进行研究。结果表明:研究区沙一段重力流沉积机制共分为滑动滑塌、泥质碎屑流、砂质碎屑流及浊流4种类型;受断层活动对古地貌的影响,研究区平面上向凹陷中心方向依次发育滑动滑塌沉积、碎屑流沉积及浊流沉积。在此基础上,从重力流沉积发育位置、圈闭条件及储层物性3个方面对4种成因重力流砂体的勘探潜力进行了分析,认为砂质碎屑流成因的湖底扇中扇亚相砂体沉积勘探潜力最大,其次为滑动滑塌成因砂体,浊流成因砂体次之,泥质碎屑流成因的内扇亚相砂体潜力最差。
Formation mechanism, recognition characteristics and depositional model of Es_1 Formation in Qinan Fault step belt were studied based on core, well logging, seismic and experimental data. Analysis results show that the mechanism of gravity flow sediments can be divided into four types, which are slide and slump deposits, muddy debris flow, sandy debris flow and turbidity flow deposits. Affected by the influence of fault activity made on the paleogeomorphology, the gravity flow sediments develop slide and slump deposits, debris deposits and turbidity flow deposits successively to the depression center direction. Exploration potentials of four types of sand bodies were analyzed on the basis of comparative studies of sand body location, trap conditions and reservoir physical properties. The results show that the middle fan formed by sandy debris flow has the best exploration potential, followed by the slide and slump deposits, finally the turbidity flow deposits, and the exploration potential of muddy debris flow deposits is the worst.
Formation mechanism, recognition characteristics and depositional model of Es_1 Formation in Qinan Fault step belt were studied based on core, well logging, seismic and experimental data. Analysis results show that the mechanism of gravity flow sediments can be divided into four types, which are slide and slump deposits, muddy debris flow, sandy debris flow and turbidity flow deposits. Affected by the influence of fault activity made on the paleogeomorphology, the gravity flow sediments develop slide and slump deposits, debris deposits and turbidity flow deposits successively to the depression center direction. Exploration potentials of four types of sand bodies were analyzed on the basis of comparative studies of sand body location, trap conditions and reservoir physical properties. The results show that the middle fan formed by sandy debris flow has the best exploration potential, followed by the slide and slump deposits, finally the turbidity flow deposits, and the exploration potential of muddy debris flow deposits is the worst.
引文
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[20]陈莹,林畅松,余宏忠,等.歧口凹陷古近纪同沉积断裂对层序和沉积体系的控制[J].地质力学学报,2006,12(3):378-386.
[21]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.
[22]张鹏,罗霞,苏朝光,等.车西地区湖底扇沉积特征及储集物性[J].断块油气田,2009,16(5):17-19.
[23]林承焰,高国强.梁家楼油田湖底扇沉积体系划分对比[J].断块油气田,2007,14(1):19-21.
[2]李振鹏.歧南断阶带沙一段湖底扇沉积及砂体展布特征[J].特种油气藏,2018,25(5):51-55.
[3]骆帅兵,张莉,雷振宇,等.陆坡盆地体系深水重力流形成机制、沉积模式及应用实例探讨[J].石油实验地质,2017,39(6):747-754.
[4]张迎朝,王立锋,李绪深,等.莺歌海盆地砂质块体搬运沉积及其天然气聚集[J].石油实验地质,2016,38(2):189-196.
[5]李振鹏,黄建廷,曲炳昌,等.渤海海域歧南断阶带明下段河湖交替相沉积[J].科学技术与工程,2018,18(4):255-262.
[6]李振鹏,张国坤,汪跃,等.歧南断阶带沙河街组储层特征及物性主控因素[J].断块油气田,2018,25(3):294-299.
[7]李振鹏,马存飞,刘春艳,等.地层视垂直厚度分析在油田小层对比中的应用[J].断块油气田,2018,25(5):626-634.
[8]杜晓峰,牛成民,彭文绪,等.渤海海域歧南断阶带古近系沉积体系及控制因素[J].海洋地质动态,2010,26(8):1-7.
[9]SHANMUGAM G.深水砂体成因研究新进展[J].石油勘探与开发,2013,40(3):294-301.
[10]MULDER T,ALEXANDER J.The physical character of subaqueous sedimentary density flows and their deposits[J].Sedimentology,2010,48(2):269-299.
[11]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.
[12]陈秀艳,师晶,徐杰.渤海湾盆地东辛油田沙三中亚段重力流沉积砂体类型及含油性[J].石油与天然气地质,2010,31(5):594-602.
[13]王旭丽,周江羽,马良,等.伊通盆地岔路河断陷重力流沉积特征及油气勘探意义[J].石油实验地质,2008,30(1):26-31.
[14]任小军,于兴河,李胜利,等.坳陷湖盆缓坡重力流成因储集层沉积特征及发育条件[J].新疆石油地质,2008,29(3):303-305.
[15]COUSSOT P,MEUNIER M.R ec ognition,classification and mechanical description of debris flows[J].Earth Science Reviews,1996,40(3/4):209-227.
[16]杨田,操应长,王艳忠,等.深水重力流类型、沉积特征及成因机制:以济阳坳陷沙河街组三段中亚段为例[J].石油学报,2015,36(9):1048-1059.
[17]DRUITT T H.Settling behavior of concentrated dispersions and some volcanological applications[J].Journal of Volcanology and Geothermal Research,1995,65(1/2):27-39.
[18]LEGROS F.Can dispersive pressure cause inverse grading in grain flows[J].Journal of Sedimentary Research,2002,72(1):166-170.
[19]STOW D A V,JOHANSSON M.Deep-water massive sands:nature,origin and hydrocarbon implications[J].Marine and Petreoleum Geology,2000,17(2):145-174.
[20]陈莹,林畅松,余宏忠,等.歧口凹陷古近纪同沉积断裂对层序和沉积体系的控制[J].地质力学学报,2006,12(3):378-386.
[21]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.
[22]张鹏,罗霞,苏朝光,等.车西地区湖底扇沉积特征及储集物性[J].断块油气田,2009,16(5):17-19.
[23]林承焰,高国强.梁家楼油田湖底扇沉积体系划分对比[J].断块油气田,2007,14(1):19-21.
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