引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 121次   下载 143 本文二维码信息
码上扫一扫!
南苏门答腊盆地J 区中新统进积三角洲成因砂体叠置样式
郝睿林,黄文辉,胡广成,刘景彦,祝厚勤
0
(1.中国地质大学(北京)能源学院,北京100083;2.中国石油勘探开发研究院,北京100083)
摘要:
南苏门答腊盆地J区中新统进积三角洲成因砂体叠置样式及空间演化规律认识不清,制约了该区非构造油气藏的精细勘探。基于高精度成因地层分析,结合区域地质背景、岩石相类型、测井响应及地震特征,识别进积三角洲成因单元类型,根据其空间展布规律建立反映进积三角洲砂体结构的沉积模式,并提出三角洲砂体成因-结构分类方法和砂体叠置样式约束下的储层预测方法。研究区可识别出水下分流河道、河口坝、席状砂、分流河道间和前三角洲泥等5种成因单元。进积三角洲沉积初期发育单成因孤立砂体,可形成上倾尖灭岩性圈闭、多层薄砂反向断块-岩性圈闭;沉积中期以双成因叠加复合砂体为主、单成因孤立砂体为辅,可形成多层反向断块-岩性圈闭;沉积后期以多成因切叠复合砂体为主、双成因叠加复合砂体为辅,可形成多层复杂断块-岩性圈闭、块状地层不整合圈闭;从下到上呈单成因孤立-双成因叠加-多成因切叠砂体叠置样式。
关键词:  进积三角洲  成因单元  沉积模式  砂体成因-结构分类  砂体叠置样式  南苏门答腊盆地
DOI:10.13673/j.cnki.cn37-1359/te.2020.04.006
基金项目:中国石油天然气股份公司科技项目“层内剩余油定量表征与应用”(2019B-1206)。
Superimposition patterns of sandbodies in Miocene progradational deltas in Block J,South Sumatra Basin
HAO Ruilin,HUANG Wenhui,HU Guangcheng,LIU Jingyan,ZHU Houqin
(1.School of Energy Resources,China University of Geosciences(Beijing),Beijing City,100083,China;2.Research Institute of Petroleum Exploration & Development,PetroChina,Beijing City,100083,China)
Abstract:
The detail exploration of non-structure hydrocarbon reservoirs in Miocene progradational delta in Block J of South Sumatra Basin is restricted by the unclear understanding of the superimposition patterns and spatial evolution law of sandbodies. Based on the analysis of the high-resolution sequence stratigraphy,regional geological setting,lithofacies,logging response,and seismic features,the genetic unit types of progradational delta are identified. A depositional model reflecting the sandstone architectures of progradational delta is established according to their spatial distribution. The genetic-architecture sandbody classification and reservoir prediction methods restricted by the sandbody superimposition patterns are further proposed. The results show that five genetic unit types are identified in study area,including underwater distributary channel,mouth bar,sheet sand,distributary inter-channel and pre-delta mud in the deltaic depositional system. At early stage of progradational delta sedimentation,the isolated mono-genetic sandbodies were developed and the updip tip-out lithologic trap and multi-layered thin sand reverse block-lithologic trap formed. At the middle stage,the superimposed bi-genetic sandbodies were mainly developed and followed by isolated mono-genetic sandbody,and multi-layered reverse block-lithologic trap formed. At the final stage,the multi-genetic incised superimposed sandbodies were mainly developed and followed by bi-genetic sandbodies,and multilayer complex fault block-lithologic trap and block formation unconformity trap formed.From bottom to top,the superimposed pattern shows as the isolated mono-genetic sandbody-superimposed bi-genetic sandbodies-multi-genetic incised superimposed sandbodies.
Key words:  progradational delta  genetic unit  depositional mode  sandbody genetic-architecture classification  sandbody superimposed pattern  South Sumatra Basin

用微信扫一扫

用微信扫一扫