Title

Interior structural characterization of dolomite buried hill based on Walkaway VSP imaging technology

作者

付检刚蔡志东李霖林田文慧张晓丹1

单位

中国石油集团东方地球物理公司新兴物探开发处，河北涿州 072751 中国地质大学（北京）地球物理与信息技术学院，北京 100083

摘要

塔里木盆地寒武系—奥陶系白云岩潜山埋藏深，地震资料品质差，难以获得不整合面之下潜山内幕断裂和地层的产状及平面分布，导致对白云岩潜山构造模式认识不清。文中利用塔里木油田ZG58井Walkaway VSP资料，获取了白云岩潜山内幕真实有效的地层反射信息，通过波场分离得到了潜山内幕地层可靠的纵波和转换横波波场；利用Walkaway VSP成像技术，获得了高分辨率、高保真度的Walkaway VSP纵波和转换横波成像剖面；结合区域地质，精细刻画了白云岩潜山内幕的构造形态。Walkaway VSP剖面上断层和地层的产状和倾角与实际钻井所获取的倾角测井资料吻合，有效建立了ZG58井区白云岩潜山内幕储层的构造模式，指导了该地区白云岩潜山的勘探和开发。

Abstract

Due to the deep burial depth of the Cambrian?鄄Ordovician dolomite buried hills and the poor quality of seismic data, it is impossible to obtain the occurrence and plane distribution of faults and strata of the buried hills below the unconformity surface, resulting in the unclear structural model of the dolomite buried hills. Using the data collected from Walkaway VSP in Well ZG58 of Tarim Oilfield, the effective reflection information of the inner layer of dolomite is obtained. Through the wave field separation method, the PP wave and PS wave field in the buried hills′s inner strata have been obtained. Walkaway VSP imaging technology is used to obtain high resolution and high fidelity Walkaway VSP PP wave and PS wave imaging section. Combined with regional geological knowledge, the structural form of the dolomite interior is depicted in detail. The occurrence and dip of faults on the Walkaway VSP profile coincide with the obliquity logging data obtained by the actual drilling. the structural pattern of the dolomite inner reservoir in the ZG58 well area is effectively established, and effectively guiding the exploration and development of dolomite reservoirs in this area.

关键词：

白云岩潜山; 构造模式; Walkaway VSP; 纵波和转换横波成像; 精细刻画; 构造形态;

Keywords:

1.New Technique Prospecting Department, BGP Inc., CNPC, Zhuozhou 072751, China; 2.School of Geophysics and Information Technology, China University of Geoscience, Beijing 100083, China;

基金项目

DOI

10.6056/dkyqt202102014

基于Walkaway VSP成像的白云岩潜山内幕构造刻画