中国石油勘探 ›› 2011, Vol. 16 ›› Issue (2): 67-71,88.

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地震属性技术在北乌斯丘尔特盆地侏罗系泥岩预测中的应用

陈学海,卢双舫,薛海涛,胡慧婷,陈学洋,韩雷   

  1. 东北石油大学地球科学学院;中国石油大庆油田公司第九采油厂;大庆钻探工程公司地质录井一公司
  • 出版日期:2011-04-15 发布日期:2011-04-15
  • 基金资助:
    国家自然科学基金项目“火山作用的生烃热效应定量表征”(40972101);国家科技重大专项“四川、塔里木、鄂尔多斯盆地及青藏南方等地区海相油气资源潜力、油气成藏与富集规律研究”(2008ZX05004-003)联合资助

Application of Seismic Attribute Technique to Jurassic Mudstone Prediction in North Ustyurt Basin

Cheng Xuehai,Lu Shuangfang,Xue Haitao,Chen Xueyang,Hu Huiting and Han Lei   

  1. Cheng Xuehai1,Lu Shuangfang1,Xue Haitao1,Chen Xueyang2,Hu Huiting1,Han Lei3//1.College of Geosciences,Northeast Petroleum University,Daqing City,Heilongjiang Province 163318;2.No.9 Oil Production Factory of PetroChina Daqing Oilfield Company,Daqing City,Heilongjiang Province 163853;3.NO.1 Geo-logging Company of Daqing Drilling & Exploration Engineering Corporation,Daqing City,Heilongjiang Province 163411
  • Online:2011-04-15 Published:2011-04-15

摘要: 北乌斯丘尔特盆地为大陆多旋回—克拉通盆地,其侏罗系地层发育了良好的烃源岩建造。由于研究区块勘探程度非常低,加之岩相古地理认识不清,给烃源岩评价造成了很大困难。针对这一问题,在对研究区地质背景进行分析的基础上,提出了运用地震属性技术对泥岩含量进行预测的方法。利用Landmark软件提取了11种地震属性,并对属性间的相关性及属性与泥岩含量间的敏感性逐一进行分析,优选出均方根振幅、弧线长度和最大谷值振幅3种对泥岩含量最敏感的属性。通过多元线性回归的方法建立了研究区泥岩含量预测模型,从而预测了其侏罗系泥岩含量及分布。经验证,预测结果与钻井吻合程度较好。最终,指出了有利泥岩发育区带,为下一步勘探提供了可靠的科学依据。

关键词: 地震属性, 多元线性回归, 泥岩预测, 侏罗系, 北乌斯丘尔特盆地

Abstract: North Ustyurt Basin is a continent polycyclic-cratonic basin, its Jurassic strata developed several good sets of source rocks. Because of low exploration activity and unclear understanding of the lithofacies palaeogeography of the study area, the evaluation for source rocks is facing great difficulties. In order to solve this problem, a method using seismic attributes technique to predict mudstone content is presented, based on the analysis of regional geological background of the study area. 11 kinds of seismic attributes are extracted by Landmark according to the seismic data in exploration area. Through analysis of the correlation and sensitivity of the seismic attributes, three attributes such as RMS Amplitude, Arc Length and Maximum Trough Amplitude which are most sensitive to mudstone content are selected as the analysis parameters of prediction models of mudstone content. Accordingly, by the theory of multiple linear regression, we put forward a model predicting the content and distribution of the mudstone of Jurassic in the study area. After verification, the prediction from the model matches well with the drilling data. Finally, the favorable mudstone zones in the exploration area is indicated, there is no doubt that this study will provide reliable foundation for further exploration in the study area.

Key words: seismic attributes, multiple linear regression, mudstone prediction, Jurassic, North Ustyurt Basin

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