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物探与化探  2015, Vol. 39 Issue (4): 805-811    DOI: 10.11720/wtyht.2015.4.24
  方法技术研究 本期目录 | 过刊浏览 | 高级检索 |
基于井数据约束的高精度层析速度反演
白雪1, 李振春1, 张凯1, 宋翔宇1, 杨国权1, 尚江伟2
1. 中国石油大学(华东) 地球科学与技术学院, 山东 青岛 266580;
2. 中国石油塔里木油田分公司 勘探开发研究院, 新疆 库尔勒 841000
High-precision tomography velocity inversion based on well data constraint
BAI Xue1, LI Zhen-Chun1, ZHANG Kai1, SONG Xiang-Yu1, YANG Guo-Quan1, SHANG Jiang-Wei2
1. School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;
2. Research Institution of Petroleum Exploration and Development, Tarim Oilfield, PetroChina, Korla 841000, China
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摘要 

测井数据是一种准确可靠的先验信息。在层析反演方程组中加入井数据信息一定程度上提高了反演精度和效率,但仍无法精确描述微幅构造地质体。针对这一特点,笔者提出了基于井数据约束的高精度层析速度反演方法。首先进行常规的井约束层析速度反演,假定测井处的网格速度不更新,建立井约束反演方程组,更新速度场,得到初步的偏移成像结果;然后在此基础上利用测井速度信息约束偏移深度,对更新后的速度场进行速度分析及精细化建模,提高速度建模精度,同时减少了反演迭代更新次数,提高了反演效率。模型试算及实际资料处理结果表明,该方法具有更高的反演精度和计算效率。

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Abstract

Logging data is considered to be prior information which is fairly accurate and reliable.The utilization of the logging velocity information in the tomographic inverse function system can enhance the precision and efficiency;Nevertheless,it fails to describe the small-scale targets exactly.In view of such a situation,the authors propose a high-precision tomography velocity inversion method based on the well data constraint in this paper.First,the traditional well data constraint tomography velocity inversion is performed.Under the presumption that he velocity of grids in the well position remains the same,the inversion function is establishd based on the well data constraint,the velocity field is updated,and the primary migration image is updated.Second,the logging velocity is used to restrain the migration depth,process velocity analysis and perform precise modeling,thus improving the modeling accuracy greatly.At the same time,the number of the inversion iteration is reduced and the precision is improved.Examples from the synthetic dataset and field data processing demonstrate the feasibility and validity of this method compared with traditional tomography velocity inversion and waveform inversion.

收稿日期: 2014-10-29      出版日期: 2015-08-10
:  P631.4  
基金资助:

国家科技重大专项(2011ZX05006-002);国家自然科学基金(41374122、41204086)

作者简介: 白雪(1989-),女,硕士研究生,主要从事速度分析及地震波偏移成像方面的研究工作。
引用本文:   
白雪, 李振春, 张凯, 宋翔宇, 杨国权, 尚江伟. 基于井数据约束的高精度层析速度反演[J]. 物探与化探, 2015, 39(4): 805-811.
BAI Xue, LI Zhen-Chun, ZHANG Kai, SONG Xiang-Yu, YANG Guo-Quan, SHANG Jiang-Wei. High-precision tomography velocity inversion based on well data constraint. Geophysical and Geochemical Exploration, 2015, 39(4): 805-811.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2015.4.24      或      https://www.wutanyuhuatan.com/CN/Y2015/V39/I4/805

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