天然气勘探

扩展弹性阻抗反演在深海扇含气储层识别中的应用

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  • 中国地质大学(北京)能源学院,北京 100083
谢清惠(1985-),女,福建福州人,博士研究生,主要从事构造解释、高分辨层序地层以及储层预测方面研究. E-mail:qinghuixie@sina.com.

收稿日期: 2012-06-22

  修回日期: 2012-08-24

  网络出版日期: 2013-02-10

Application of EEI Inversion Technique to Submarine Gas Reservoir

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  • China University of Geosciences (Beijing),Beijing 100083,China

Received date: 2012-06-22

  Revised date: 2012-08-24

  Online published: 2013-02-10

摘要

深海扇A区块的纵波阻抗对气水层的分辨能力低,利用常规叠后波阻抗难以有效预测流体展布范围,为此采用了叠前扩展弹性阻抗反演技术。扩展弹性阻抗反演技术是弹性波阻抗反演的进一步推广,其包含更丰富的岩性和流体信息,是一种有效的流体检测技术。在简介扩展弹性阻抗的概念以及反演方法原理的基础上,着重分析了研究区流体检测敏感参数,优选了流体检测的最优理论角度,最终计算生成了用于流体检测的扩展弹性阻抗曲线。对研究区实际资料进行的扩展弹性阻抗反演的实际应用效果表明,扩展弹性阻抗反演在深海扇储层的流体识别,特别是气水判别方面具有良好的效果,由此为深海扇储层的含流体性质建立了一种有效的判别方法。

本文引用格式

谢清惠,邓宏文,郑文波,詹路峰 . 扩展弹性阻抗反演在深海扇含气储层识别中的应用[J]. 天然气地球科学, 2013 , 24(1) : 162 -168 . DOI: 10.11764/j.issn.1672-1926.2013.01.162

Abstract

In submarine Block A,traditional post-stack wave impedance cannot effectively predict the fluid-distribution range because of low ability of P-impedance to identify gas and water. In this paper,we adopt the pre-stack extended elastic impedance (EEI) inversion technique. EEI inversion technique including more information about lithology and fluids is an effective technique for the fluid detection and recognition. On the basis of briefly presenting the concept,method and principle of EEI,we use this inversion method to the submarine Block A. We check the sensitive parameters for fluid detection,optimize the optimal theory angles for fluid detection,and calculate the EEI curves for fluid detection. The results show that the pre-stack extended elastic impedance inversion is favorable for the submarine reservoir fluid identification,especially for the gas and water detection. So the effective fluid identification is established for deep submarine fans.

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