渤中坳陷沙北地区构造—沉积分析
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王永利(1974—),男,山东日照人,高级工程师,从事油气勘探研究与管理工作。联系电话:(022)25807961,E-mail:wangyl2@cnooc.com.cn。

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国家科技重大专项“近海大中型油气田形成条件与分布”(2011ZX05023-006)。


Tectonic-sedimentary analysis of Shabei area in Bozhong depression
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    利用三维地震和钻井资料,基于构造—沉积分析方法,在盆地构造活动性分析的基础上,研究了渤中坳陷沙北地区古近纪的构造—沉积充填响应及其演化过程,结合钻井岩相、地震相和地震属性的对应关系,探讨了研究区构造—沉积的时空演化规律。研究区发育U型沟谷、W型沟谷、V型沟谷、单断槽、双断槽5种古沟谷体系和断崖型、断坡型、同向断阶型和反向断阶型4种构造坡折带类型。不同古沟谷的输砂能力及对应扇体规模各异,不同坡折带类型对应的沉积物的堆积样式不同。研究区在沙河街组沉积时期发育富砂的扇三角洲沉积和富泥的滨浅湖沉积,物源来自石臼坨凸起和沙垒田凸起,为近源体系;在东营组沉积时期除发育扇三角洲沉积外,开始发育辫状河三角洲沉积,包含了近源的石臼坨凸起和沙垒田凸起以及远源的北部古滦河流域两大物源体系。

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    Based on the approach of tectonic-sedimentary analysis and the basin tectonic activity,the filling response of paleogene tectonic-sedimentary and its evolution process in great details were studied by 3D seismic and drilling data of the Shabei area in Bozhong depression. Furthermore,combined with the corresponding relationship among the lithofacies,seismic facies and seismic attributes,the tectonic-sedimentary evolution regularity in time-space was discussed. Five types of ancient valley systems(U-type,W-type,V-type valleys,single fault trough,and double fault trough),and four types of tectonic break zones(cliff type,ramp type,synthetic and antithetic fault terrace types)developed in the study area. The sandtransport ability of different ancient valleys varies,so the scale of its corresponding fan body differs as well;sedimentary build-up varies with different slope broken zones. The sand-rich fan delta and mud-rich coastal shallow-lake developed during Shahejie Formation deposited in the study region,whose provenance came from the near source system of Shijiutuo uplift and Shaleitian uplift. However,not only the fan delta developed during Dongying Formation sedimentary period,but also the braided river delta began to develop,which included two main provenance systems(the near source system of Shijiutuo uplift and Shaleitian uplift)and the far source system of northern paleo-Luan River.

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王永利,陈树光.渤中坳陷沙北地区构造—沉积分析[J].油气地质与采收率,2015,22(4):26~32

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  • 在线发布日期: 2015-07-22
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