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基于母岩类型差异的深层砂砾岩储集体成岩演化机制——以渤海湾盆地车镇凹陷沙河街组三段下亚段为例
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  • 英文篇名:Diagenetic evolution mechanism of deep glutenite reservoirs based on differences in parent rock types:a case study of lower submember of Member 3 of Shahejie Formation in Chezhen sag,Bohai Bay Basin
  • 作者:林红梅 ; 刘鹏 ; 王彤达 ; 陈世悦 ; 穆星 ; 刘雅利 ; 孟涛
  • 英文作者:Lin Hongmei;Liu Peng;Wang Tongda;Chen Shiyue;Mu Xing;Liu Yali;Meng Tao;School of Geosciences,China University of Petroleum;Research Institute of Exploration and Development,Sinopec Shengli Oilfield Company;Working Stations for Postdoctoral Scientific Research,Shengli Oilfield;
  • 关键词:母岩类型 ; 成岩环境 ; 成岩演化 ; 有利储层 ; 车镇凹陷
  • 英文关键词:parent rock type;;diagenetic environment;;diagenesis evolution;;favorable reservoir;;Chezhen sag
  • 中文刊名:石油学报
  • 英文刊名:Acta Petrolei Sinica
  • 机构:中国石油大学(华东)地球科学与技术学院;中国石油化工股份有限公司胜利油田分公司勘探开发研究院;胜利石油管理局博士后科研工作站;
  • 出版日期:2019-10-15
  • 出版单位:石油学报
  • 年:2019
  • 期:10
  • 基金:中国石油化工股份有限公司科技攻关项目“车镇凹陷油气成藏规律及潜力评价”(P15083);中国石油化工股份有限公司胜利油田分公司科技攻关项目“车镇地区沙三段砂砾岩储层有效性评价及目标优选”(YKK1908)资助
  • 语种:中文;
  • 页:38-49
  • 页数:12
  • CN:11-2128/TE
  • ISSN:0253-2697
  • 分类号:P618.13
摘要
为探寻母岩类型对砂砾岩储集体成岩演化的控制作用,以渤海湾盆地车镇凹陷沙河街组三段下亚段为例,通过岩心全岩矿物X射线衍射、岩石薄片和流体包裹体等分析测试,系统分析了储集体的母岩类型、成岩环境及成岩演化机制。研究结果表明:车镇凹陷在沙河街组三段下亚段沉积期受控于母岩区埕子口凸起的差异构造升降和剥蚀作用,砂砾岩储集体的母岩由西向东依次发育碳酸盐岩、混合型和长英质3种类型;在不同母岩类型的砂砾岩储集体中,刚性颗粒和可溶矿物含量的不同决定了储集体自身的抗压实能力及其可溶于酸性流体的差异;在碱性—酸性—碱性成岩环境的交替影响下,刚性颗粒的支撑可有效沟通酸性流体,酸性流体与可溶矿物的水岩作用可形成次生孔隙;受控于刚性颗粒与可溶矿物的发育条件,各类型储集体的成岩演化机制存在差异;碳酸盐岩母岩型储集体、长英质母岩型储集体和母岩混合型储集体的有利储层在纵向上分别位于3 200 m、3 800 m和4 400 m以浅区域,平面上,母岩混合型储集体、长英质母岩型储集体、碳酸盐岩母岩型储集体的有利储层范围依次递减,各类型储集体的勘探方向存在差异。
        Taking the lower submember of Member 3 of Shahejie Formation in Chezhen sag of Bohai Bay Basin as an example,and based on the analysis and testing of core rock X-ray diffraction,thin sections and fluid inclusions,this paper systematically analyzes the parent rock type,diagenetic environment and diagenetic evolution mechanism of the reservoir,so as to explore the control effect of parent rock type on diagenetic evolution of glutenite reservoir.The results show that the Chezhen sag is controlled by the differential tectonic uplift and denudation of Chengzikou uplift in the parent rock area during the sedimentary period of lower submember of Member 3 of Shahejie Formation.Three types of parent rock are successively developed in the glutenite reservoir,shown as carbonate rock-based,hybrid rock-based and felsic rock-based reservoirs from the west to the east;in the glutenite reservoirs of different parent rock types,the difference in the content of rigid particles and soluble minerals determines the compressive capacity of reservoirs and their differences in the solubility in acidic fluids.Under the alternating influence of alkaline-acid-alkaline diagenetic environment,acidic fluids can be effectively communicated by the support of rigid particles,and secondary pores can be formed through the water-rock interaction between acidic fluids and soluble minerals.Controlled by the development conditions of rigid particles and soluble minerals,various types of reservoirs present different diagenetic evolution mechanisms.The favorable reservoirs in the carbonate rock-based reservoir,felsic rock-based reservoir and hybrid rock-based reservoir are vertically located in the shallow regions of3 200 m,3 800 m and 4 400 m;on the horizontal level,the scale of favorable reservoirs is successively decreased,and there are differences in the exploration direction among each type of reservoirs.
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