| 川中地区上三叠统须四段砂体成因组合及对油气富集的影响 |
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| 引用本文： | 谢武仁,李熙喆,杨威,张满郎,谢增业,金蕙.川中地区上三叠统须四段砂体成因组合及对油气富集的影响[J].沉积学报,2009,27(6):1084-1092. |
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| 作者姓名： | 谢武仁 李熙喆 杨威 张满郎 谢增业 金蕙 |
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| 作者单位： | 中国石油勘探开发研究院廊坊分院河北廊坊065007 |
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| 基金项目： | 中国石油天然气股份有限公司科技攻关项目 |
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| 摘 要： | 川中地区上三叠统须四段砂体厚度大，沉积稳定，为近物源区的三角洲沉积特征。沉积过程中，物源供应速率与可容纳空间增长关系的变化，导致须四段砂体自下而上由水退式、河道式和水进式三种不同成因类型的砂组纵向叠合而成；层序界面之上的河道式砂组为物性最好的成因砂体。水退式砂组主要由高能削截式河道、削截式河口坝和远砂坝组成，河道式砂组主要包括冲蚀下切式河道和高能削截式河道，水进式砂组主要包括低能河道、低能削截式河道、完整式河口坝和下缺式河口坝。由于不同的砂体组合，不同成因砂体间形成了不同的成岩相和储集相，河道式砂组以绿泥石衬边和溶蚀成岩相为主，物性好，为好的储集体；水进式砂组由压实和胶结相为主，物性较差；水退式砂组中溶蚀相和胶结相发育，物性较好，为中等的储集体。由于河道式砂组与水退式砂组呈沉积不整合相接触，呈现镶嵌关系，对天然气的运移起到通道作用，同时河道式砂组在平面上分布范围大，其中的高能削截式河道沉积稳定，为油气的富集提供了足够的空间，向上的水进式砂组发生储层致密化，形成有利的盖层，使河道式砂组发育区成为川中天然气富集的有利部位。
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| 关 键 词： | 川中地区上三叠统须四段砂体成因河道砂体砂体组合 |
| 收稿时间： | 1900-01-01 |
Genetic Combination of the Sandbody in the Fourth Members of Xujiahe Formation (Upper Triassic) and Its Influence on Oil and Gas Reservoirs |
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| XIE Wur-en,LI Xi-zhe,YANG Wei,ZHANG Man-lang,XIE Zeng-ye,JIN Hui.Genetic Combination of the Sandbody in the Fourth Members of Xujiahe Formation (Upper Triassic) and Its Influence on Oil and Gas Reservoirs[J].Acta Sedimentologica Sinica,2009,27(6):1084-1092. |
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| Authors: | XIE Wur-en LI Xi-zhe YANG Wei ZHANG Man-lang XIE Zeng-ye JIN Hui |
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| Institution: | The Geology Institute of Langfang Branch, Petroleum Exploration and Development Research Institute,Langfang Hebei065007 |
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| Abstract: | The sandbody of Upper Triassic Xu 4 member in central Sichuan basin is thick,continuous sedimentation,and characterized by shore-shallow lacustrine-delta front-delta plain which is proximal.During sedimentation,there were different accommodation space /sedimentary supply values,the Xu 4 member sandbody consists of three vertical superposed types which is regressive,channel and transgressive from bottom to top;and the channel sandbody composition on sequence boundary is the best genetic sandbody.Regressive s... |
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| Keywords: | central Sichuan Basin Upper Triassic series Xu 4 member genesis of sand body channel sand combination of sandbody |
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