新疆石油地质

新疆石油地质 ›› 2002, Vol. 23 ›› Issue (6): 507-510.

• 油气勘探 • 上一篇    下一篇

塔里木盆地巨型速度场的建立

朱广生1, 杨金华2, 段天友1, 杨舒1, 陈遵德1, 黄录中2   

  1. 1.江汉石油学院,湖北 荆州 434102;
    2.中国石油 塔里木油田分公司,新疆 库尔勒 841000
  • 收稿日期:2002-04-05 出版日期:2002-12-01 发布日期:2020-08-12
  • 作者简介:朱广生（1941-）,男,江苏连云港人,教授,地球物理勘探。联系电话：0716-8431960

The Method and Effect to Develop the Gigantic Velocity Field in Tarim Basin

ZHU Guang-sheng, YANG Jin-hua, DUAN Tian-you, YANG Shu, CHEN Zun-de, HUANG Lu-zhong   

  • Received:2002-04-05 Online:2002-12-01 Published:2020-08-12
  • About author:ZHU Guang-sheng (1941-), Male, Professor, Geophysics, Geophysical Prospecting Department, Jianghan Petroleum Institute, Jinzhou, Hubei 434023, China

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摘要： 作者提出了一套构建高精度巨型速度场的方法,在塔里木盆地里建立的一个巨型速度场,面积达10.2×104km2,深度达8km.针对巨型速度场的特有问题,采用野值自动剔除、交点速度闭合、水平切片速度标定、用线性介质模型下延VSP匪直地震剖面)数据、利用校正后声波测井资料补充VSP井密度不足等方法,综合使用速度谱、VSP和声波资料以及数据库技术建立了高精度速度场。用速度场建好后完成的两口VSP井实测速度数据检验表明,速度场预测速度最大绝对误差是54 m/s,平均为37 m/s;最大相对误差是1.87%, 平均为1.26%. 根据本速度场提供的速度数据绘制的深度构造图上,使原来因速度横向变化在等t0图上消失的含油气构造正确地显现出来。

关键词: 塔里木盆地, 速度分布, 速度谱, 垂直地震剖面解释, 声波测井

Abstract: In this paper, we provide a whole set of method to develop a high precise gigantic velocity field. And we build a giant velocity field in Tarim basin. This velocity field is about 10.2×104km2, which equals to the total areas of Jiangsu province, and 8 km deep. In accordance with the special problems of giant velocity field, we use automatic discarding abnormal values, ridding intersection velocity closing error, and horizontal slice velocity calibration, extend VSP well. By comprehensively using velocity spectrum, VSP, sonic log data, and database technique, we establish a high precision velocity field. With this velocity field, we test two VSP wells which were completed using velocity field data. The predicted max absolute error is 54m/s, the average is 37m/s; the max relative error is 1.87%, the average is 1.26%. According to the data given by this velocity field, we can plot a depth structural map, which correctly disclose a petroliferous structure that we can not show it on the TO contour map.

Key words: Tarim basin, velocity distribution, velocity spectrum, VSP, sonic log

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