煤层扩径段CSU声速测井响应特征研究  

Research on the Response Characteristics of CSU Acoustic Velocity Logging in Coal Seam Expansion Section

作　　者：胡永 马鑫龙 齐兴华 HU Yong;MA Xin-long;QI Xing-hua(The No.156 Coalfield Geological Exploration Team of Xinji-ang Coalfield Geological Bureaul,Urumqi Xinijang 830009,China;School of Mining Engineering and Geology,Xinjiang University of Engineering,Urumqi Xinijang 834023,China)

机构地区：[1]新疆煤田地质局一五六煤田地质勘探队,新疆乌鲁木齐830009 [2]新疆工程学院矿业工程与地质学院,新疆乌鲁木齐834023

出　　处：《西部探矿工程》2024年第8期88-91,共4页West-China Exploration Engineering

基　　金：受到新疆煤田地质局156煤田地质勘探队胡永创新工作室及新疆工程学院煤层气测井资料综合研究项目资助,项目编号:2022xgyh112212。

摘　　要：声速测井广泛应用于煤田油气田勘探以及工程地质等领域,在实际测井工作中,测量结果受多种因素影响与真实值存在较大偏差。利用COMSOL Multiphysics软件对CSU声速测井响应特征进行数值模拟研究,设计出二维轴对称竖井测井模型,验证了CSU声波时差曲线受煤层不同扩径规模、煤层厚度变化等因素的影响。结果表明,CSU声速测井的声波时差曲线不受煤层扩径段边界影响,两接收换能器所处地层即为探测目标,探测结果为目标体加权值,薄煤层探测须层厚核正,为声速测井提供了重要解释依据。Sound velocity logging is widely used in the exploration of coalfields,oil and gas fields,engineering geology,and other fields.In actual logging work,the measurement results may devi-ate significantly from the true values due to various factors.This article uses COMSOL Multiphysics software to numerically simu-late the response characteristics of CSU acoustic logging,designs a two-dimensional axisymmetric vertical well logging model,and verifies the influence of factors such as different coal seam enlarge-ment scales and coal seam thickness changes on the CSU acoustic time difference curve.The results indicate that the acoustic time difference curve of CSU sonic logging is not affected by the bound-ary of the coal seam expansion section.The formation where the two receiving transducers are located is the detection target,and the detection result is the weighted value of the target body.The de-tection of thin coal layers requires a thick core,which provides an important explanatory basis for sonic logging.

关 键 词：CSU 测井模型 煤层扩径规模 煤层厚度 

分 类 号：P631.81[天文地球—地质矿产勘探]