Title

Joint inversion of up-going SS-wave and PP-wave in land zero offset VSP with P-wave source and a tentative exploration of their application

单位

(1.中国石油天然气股份有限公司塔里木油田分公司研究院,新疆库尔勒841000;2.北京博豪罗根石油技术有限公司,北京100085;3.中国地质大学(武汉)地球科学学院,湖北武汉430074)

Organization

(1.Research institute of PetroChina Tarim Oilfield Company,Korla 841000,China;2.Beijing Borehole Logging Petroleum Technology Co.,Ltd.,Beijing 100085,China;3.School of Earth Science,China University of Geosciences(Wuhan),Wuhan 430074,China)

摘要

VSP资料主要包括上、下行纵波(P波)和上、下行转换横波(SV波)4种地震波场，且其已得到普遍应用，但纵波源VSP资料中的上行横波(SS波)却鲜为人知并未得到有效应用。通过分析研究，总结了这种上行横波的成因及其特点，探索了利用纵波源零偏VSP资料中的上行横波和纵波联合反演预测井筒附近地层流体性质的基本原理和实现方法。首先分离零偏VSP上、下行纵波和上、下行横波，再对上行纵、横波进行1D/2D地震成像并将成像剖面转换成相应的属性(如振幅包络)剖面，最后计算两者的属性比(或属性差)剖面，用于储层预测和含油气分析。给出了资料处理及储层预测的详细流程，利用实际VSP资料初步显示了上述方法的应用效果。

Abstract

There are basically 4 main seismic waves of down-going and up-going P-wave,down-going and up-going SV-wave in VSP seismic exploration,which have been widely used,but the up-going SS-wave in land VSP with P-wave source was rarely known and has not been effectively applied.The genesis up-going S-wave and its characteristics are summarized,and the basic principle and implementation of reservoir prediction around borehole are introduced in this paper.We first separate down-going and up-going S-wave,as well as down-going and up-going P-wave,second get 1D/2D images of above up-going P-wave and up-going S-wave and transform them to seismic attribute section,like amplitude envelope,finally calculate attribute ratio or attribute difference sections for reservoirs prediction and analysis of oil and gas potential.The relevant process of data processing and reservoir prediction is also given in the paper.Results of the actual data processing show the effect of the method.

关键词：

VSP; 上行横波; 资料处理; 储层预测; 地震成像; 属性分析;

Keywords:

VSP,; up-going S-wave,; seismic data processing,; reservoir predication,; seismic image,; seismic attribute analysis;

基金项目

国家科技重大专项“塔里木前陆盆地油气富集规律、勘探技术与区带和目标优选”(2011ZX05003-04)资助。

DOI

10.3969/j.issn.1000-1441.2017.04.016

纵波源零偏VSP资料中的上行横波与纵波联合反演初探