北部湾盆地徐闻探区南部断阶带水下扇体的识别与解释

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英文篇名：Identification and Interpretation of Subsea Apron of the Southern Step-fault Zone in Xuwen Exploration Area of Baibuwen Basin 中文刊名：石油天然气学报 英文刊名：Journal of Oil and Gas Technology 作者：王寅虎 ; 施琰 ; 张秀萍 ; 王巍 ; 陈予涵 ; 苏朱刘 英文作者：WANG Yinhu ; SHI Yan ; ZHANG Xiuping ; WANG Wei ; CHEN Yuhan ; SU Zhuliu ; Research Institute of Geosciences ; Jiangsu Oilfield Company ; SINOPEC 中文关键词：水下扇体 ; 断阶型 ; 北部湾盆地 英文关键词：subsea apron ; terrace fault ; Baibuwen Basin 出版日期：2014-12-15 机构：中石化江苏油田分公司地质科学研究院;有色金属华东地质勘查局;长江大学地球物理与石油资源学院; 年：2014 期：12 出版单位：石油天然气学报

摘要

北部湾盆地徐闻探区南部断阶带,地震资料品质较差。综合区域地质背景和单井岩心相分析认为,南部断阶带为近岸水下扇沉积。在建立该区层序地层格架的基础上,通过剖面分析、速度分析、时频及相干性分析等多种技术手段刻画近岸水下扇体,包括水下扇的期次、形态、范围及发育情况,最终在徐闻探区南部断阶带涠洲组识别出6期扇体。扇体的扇根和扇中互相叠置,扇根为盖层和遮挡层,扇中为储层,可形成有利的储盖组合,作为徐闻探区下步勘探的有利区带。
The quality of seismic data in the southern step-fault zone of Xuwen Exploratory Area was poorer.Based on the regional geological background and core facies,it was considered in analysis that it was a coastal subsea apron deposition in the step-fault zone.On the basis of establishing a sequence stratigraphic framework,the subsea apron was depicted by profile analysis,velocity analysis,time-frequency analysis and coherence analysis,which included the stages shape,range and developmental condition of the coastal subsea apron.Finally,6 periods of fan bodies with cross-superimposition of the root-fan and mid-fan are identified in the step-fault zone.There are special reservoir-cap rock assemblage and barrier bed.This assemblage includes the root-fan for cap-rock and barrier bed,and the mid-fan is a reservoir.The southern step-fault zone is a favorable area of oil and gas exploration.

引文

[1]姜素华,林红梅,王永诗.陡坡带砂砾岩扇体油气成藏特征——以济阳坳陷为例[J].石油物探,2003,42(3):313~317.
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