天然气地球科学

• 天然气勘探 • 上一篇    下一篇

碳酸盐岩地层横波速度预测

陈启艳,高建虎,董雪华,蒋春玲   

  1. 中国石油勘探开发研究院西北分院,甘肃  兰州730020
  • 收稿日期:2013-09-03 修回日期:2013-11-19 出版日期:2014-06-10 发布日期:2014-06-10
  • 通讯作者: 陈启艳chenqiyan@petrochina.com.cn. E-mail:chenqiyan@petrochina.com.cn.
  • 作者简介:陈启艳(1981-),女,吉林通化人,工程师,硕士,主要从事地震岩石物理、储层预测研究. E-mail:chenqiyan@petrochina.com.cn.
  • 基金资助:

    国家科技重大专项“复杂储层预测与含气检测新方法与新技术研究及应用”(编号:2011ZX05007-06)资助.

Shear Velocity Estimation in Carbonate Reservoir

 CHEN Qi-yan,GAO Jian-hu,DONG Xue-hua,JIANG Chun-ling   

  1. Research Institute of Petroleum Exploration and Development-NorthwestBranch(NWGI),PetroChina,Lanzhou 730020,China
  • Received:2013-09-03 Revised:2013-11-19 Online:2014-06-10 Published:2014-06-10

摘要:

纵横波速度是各种岩石物理性质与地震勘探的桥梁,通过纵横波速度研究可以对储层岩性、物性和流体进行有效识别。然而在实际研究中往往缺乏横波资料,这就需要对横波速度进行估算。目前碎屑岩地区横波速度预测研究已经很成熟,而碳酸盐岩储层由于复杂的岩性和孔隙结构,严重影响横波速度预测精度,造成横波预测研究发展缓慢。Xu-Payne模型通过考虑不同孔隙类型(粒间孔、孔洞及裂缝)对弹性波速度的影响,理论上能够有效预测碳酸盐岩储层的横波速度。阐述了基于Xu-Payne模型的横波速度预测方法,分析了碳酸盐岩不同孔隙形状(包括洞穴、粒间孔、裂缝)对速度的影响,对其在碳酸盐岩地层中的适用性予以解释。最后利用不同模型对碳酸盐岩实际资料进行了横波速度预测,通过比较,Xu-Payne模型法预测结果精度比Xu-white模型高2.9%,同实测横波速度吻合更好。

关键词: 横波速度, 碳酸盐岩, 孔隙形状, 孔隙纵横比, 岩石物理模型

Abstract:

P-wave velocity and S-wave velocity are the bridge of petrophysical property and seismic exploration.Through the study of P-wave velocity and S-wave velocity,we can get the effective identification of lithology,physical property and fluid.However,there is often lack of S-wave data in actual study,so S-wave velocity prediction is necessary.Now s-wave velocity prediction in clastic reservoir has developed very well,but in the carbonate reservoir,because the lithology and pore systems are very complex,the prediction accuracy is low and the development of prediction is slow.Xu-Payne model considered the effect of different pore type to elastic wave which can be used in carbonate reservoir theoretically.In this article,we introduce the method of S-wave velocity prediction which is based on rock physics,and analyze the effect of pore type on P-wave and S-wave velocity,such as stiff pores,inter-particle pores and crack.Also we compare it with other models,the prediction accuracy of Xu-Payne model is 2.9% higher than that by Xu-White model,so it is more consistent to the measured S-wave log.

Key words: S-wave velocity, Carbonate reservoir, Pore shape, Aspect ratio, Rock physics model

中图分类号: 

  • TE132.1+4

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