地球物理学进展 ›› 2018, Vol. 33 ›› Issue (5): 1997-2001.doi: 10.6038/pg2018BB0428

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

急倾斜煤层地区“T”型观测系统采集方法与应用

魏书宏1(),王建青1,薛俊杰2   

  1. 1. 山西省煤炭地质物探测绘院,山西晋中 030600
    2. 辽宁工业大学理学院,辽宁锦州 121001
  • 收稿日期:2017-12-13 修回日期:2018-08-27 出版日期:2018-10-20 发布日期:2019-01-11
  • 作者简介:魏书宏,男,1966年生,山西晋中人,毕业于山西矿业学院,教授级高工,现从事煤田地质和煤田物探工作.

Acquisition method and application of “T”type observation system in steeply inclined coal seam area

WEI Shu-hong1(),WANG Jian-qing1,XUE Jun-jie2   

  1. 1. Coal Geological Geophysical Exploration Surveying and Mapping Institute of Shanxi Province, Shanxi Jinzhong 030600, China
    2. College of Sciences,Liaoning University of Technology,Liaoning Jinzhou 121001,China
  • Received:2017-12-13 Revised:2018-08-27 Online:2018-10-20 Published:2019-01-11

摘要:

煤层急倾斜 (煤层倾角大于45°)情况下的地震观测条件十分复杂,如果按常规采集系统进行数据观测采集,将会引起较大的剩余时差,研究对煤层急倾斜地区进行三维地震勘探的资料采集十分必要.针对急倾斜煤层赋存特点,通过研究地层倾角与剩余时差,以及和反射系数之间的关系,本文提出“T”型观测系统,即:沿地层走向布设激发测线,把激发点放在其下倾的一侧,使激发点和接收点保持一定的距离,组成相对位置关系为“T”形的观测系统.通过在青海东北部木里煤田(煤层倾角为40°~60°)采用合适的 “T”型观测系统参数,取得了较好的勘探效果,为提交高质量三维地震勘探成果打下基础.

关键词: 煤田地震, 急倾斜煤层, “T”型;, 采集方法

Abstract:

It is very complex to finish field survey for steep coal seam (angle of coal seam greater than 45°).The deviation caused by steep coal seam will appear if traditional suevey system adopted.It is necessary to develop suitble seismic data collection system. In this paper,the “T” type observation system has been proposed based on analyzing the relation ship between angle of coal seam and refplect parameter.The system was used and suiltble survey parameter was selected in the Muli coal mine northeast Qinghai (angle of coal seam at 40°~60°),and achieved good results,laying a solid foundation for the submission of high quality 3D seismic results.

Key words: coalfield three dimensional seismic, steep coal seam, acquisition method, effect

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