岩性油气藏 ›› 2019, Vol. 31 ›› Issue (6): 1–13.doi: 10.12108/yxyqc.20190601

• 油气地质 •    下一篇

地震隐性层序界面识别、高频层序格架建立与岩性圈闭勘探——以吐哈盆地西缘侏罗系—白垩系为例

杨占龙1,2, 沙雪梅1,2, 魏立花1,2, 黄军平1,2, 肖冬生3   

  1. 1. 中国石油勘探开发研究院 西北分院, 兰州 730020;
    2. 中国石油集团油藏描述重点实验室, 兰州 730020;
    3. 中国石油吐哈油田分公司 勘探开发研究院, 新疆 哈密 839009
  • 收稿日期:2019-05-08 修回日期:2019-05-08 出版日期:2019-11-21 发布日期:2019-09-28
  • 第一作者:杨占龙(1970-),男,博士,高级工程师,主要从事岩性油气藏勘探方法与技术及含油气盆地油气地质特征综合评价等方面的研究。地址:(730020)甘肃省兰州市城关区雁儿湾路535号。Email:yang_zl@petrochina.com.cn。
  • 基金资助:
    国家油气重大科技专项"岩性地层油气藏区带、圈闭有效性评价预测技术"（编号：2017ZX05001-003）资助

Seismic subtle sequence boundary identification,high-frequency sequence framework establishment and lithologic trap exploration: a case study of Jurassic to Cretaceous in the western margin of Turpan-Kumul Basin

YANG Zhanlong1,2, SHA Xuemei1,2, WEI Lihua1,2, HUANG Junping1,2, XIAO Dongsheng3   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
    2. Key Laboratory of Reservoir Description, CNPC, Lanzhou 730020, China;
    3. Research Institute of Exploration and Development, PetroChina Tuha Oilfield Company, Kumul 839009, Xinjiang, China
  • Received:2019-05-08 Revised:2019-05-08 Online:2019-11-21 Published:2019-09-28

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摘要： 地震资料识别的层序界面精度低于测井资料建立的空间层序格架精度，难以满足具层圈闭特征岩性圈闭勘探的需求。提出了一种基于井-震时频匹配分析与地震全反射追踪相结合的地震隐性层序界面识别及高频层序格架建立方法，主要包括逐级细化的测井时频分析与井-震标定，得到与测井资料相适应的地震反射旋回变化关系；在小时窗地震时频分析基础上，通过地震全反射追踪技术，建立高频空间层序格架。利用该方法建立的层序格架中的层序界面既具有反映沉积旋回变化特征的明确地质含义，又具有足够的分辨率，能有效识别地震资料中采用常规方法难以识别的隐性层序界面，进而满足岩性圈闭识别、描述等对于层序地层研究的精度要求；结合吐哈盆地西缘地区侏罗系等开展了实例应用并取得了良好效果。该方法的提出有助于深入挖掘现有地震资料的地质解释潜力、开展地震高频层序地层研究和岩性油气藏勘探。

关键词: 隐性层序界面, 高频层序格架, 时频分析, 全反射追踪, 井-震匹配, 岩性圈闭

Abstract: Focusing on the facts that the type and accuracy of sequence boundaries identified on seismic is lower than that on logging and the established sequence framework cannot favorably meet the needs of lithologic reservoir exploration,a method of seismic subtle sequence boundary identification and high-frequency sequence framework establishment was proposed based on logging-seismic time-frequency matching analysis and seismic all-reflector tracking. Technically,it involves the time-frequency analysis of logging,logging calibration to seismic and seismic all-reflector tracking based on seismic time-frequency analysis,and the relationship of seismic reflection cycles matching to logging was obtained and the high-resolution spatial sequence framework was established. The sequence boundaries within this framework not only have clear geological meanings of sedimentary cycles,but also have high resolution. It can effectively identify the subtle sequence boundary which is difficult to be recognized by conventional method,and favorably meet the accuracy requirements for lithologic trap identification and description in sequence stratigraphy study. The Jurassic in the western margin of Turpan-Kumul Basin demonstrated the application of this method and good result was achieved. It is helpful for tapping the potential of seismic interpretation,high-resolution sequence stratigraphy study and lithologic reservoir exploration.

Key words: subtle sequence boundary, high-frequency sequence framework, time-frequency analysis, all-reflector tracking, logging matching to seismic, lithologic trap

中图分类号: 

  • TE121.3
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