利用纵波AVA进行裂缝储层和流体识别

英文篇名：USING P-WAVE AVA FOR FRACTURE DETECTION AND FLUID RECOGNIZING
中文刊名：物探化探计算技术
英文刊名：Computing Techniques for Geophysical and Geochemical Exploration
作者：张建伟 ; 陈天胜 ; 宁俊瑞 ; 孙建国
英文作者：ZHANG Jian-wei 1 ; 2 ; CHEN Tian-sheng 1 ; NING Jun-rui 1 ; et al.(1.Research Institute of Petroleum E&P ; SINOPEC ; Bei-jing 100083 ; China ; 2.China University of Petroleum ; Beijing 102200 ; China)
中文关键词：裂缝 ; AVA ; 流体 ; 各向异性
英文关键词：fracture ; AVA ; fluid(oil or water) ; anisotropy
出版日期：2009-11-15
机构：中国石化石油勘探开发研究院;中国石油大学;
年：2009
期：06
出版单位：物探化探计算技术

摘要

裂缝储层的地震响应表现为各向异性,描述裂缝物理特征参数正柔量和剪切柔量是裂缝密度函数。含气裂缝和含油、水裂缝的剪切柔量相等;而含气时,正柔量不为零,含油、水时,正柔量为零。横波分裂能反演裂缝密度和方位,但是不能指示裂缝中流体类型。近年来,纵波速度和振幅的方位特征检测裂缝得到了广泛应用,这里根据线性滑动模型建立了描述裂缝物理特性参数和各向异性参数之间的关系,分析了流体类型识别的可行性,并利用多方位角纵波AVO反演各向异性参数和柔量参数,以此来预测裂缝中流体类型。
The seismic response of fracture reservoir is anisotropy.It is the density function that the fracture characteristic is described by the positive soft measure quantum and shear soft measure quantum.The shear soft measure quantum of gas fracture is equal to that of oil and water fracture.But the positive soft measure quantum of gas fracture is not equal to zero,and the positive soft measure quantum of oil and water fracture is equal to zero.It can not show fluid type of fracture in despite of it can be gotten that the density and azimuth of fracture by S-wave(after split).Recently,it is applied widely that the fracture is detected by P-wave velocity and amplitude's azimuth character.This paper shows that the relation of describing fracture characteristic parameter and anisotropy parameter is gotten by the linear slip interfaces model.After analyzing the possibility of recognizing fluid's type in the fracture,the anisotropy parameter and soft measure quantum parameter are gotten by P-wave AVO inversion using multi azimuth which can be used to recognize fluid type in the fracture reservoir.

引文

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