高温高压下岩心的声学性质研究  

Acoustic Characteristics of Core under High Temperature and High Pressure (HTHP)

作　　者：江万哲[1] 章成广[1] 黄文新[1] 李维彦[1] 

机构地区：[1]长江大学地球物理与石油资源学院,湖北荆州434023

出　　处：《江汉石油学院学报》2004年第1期51-53,共3页Journal of Jianghan Petroleum Institute

基　　金：湖北省自然科学基金项目 ( 2 0 0 1ABB0 3 9)

摘　　要：通过实验 ,模拟井下储层的温度压力条件 ,以钻井取心后制成的小岩心为对象 ,研究了岩心纵波速度与温度、压力的关系 ,以及在一定压力下随流体饱和度变化时纵波速度的变化规律和纵波幅度的衰减规律。研究发现 ,压力对声速的影响可达 35 %以上 ,因此在做声波驱替饱和实验时 ,必须考虑压力条件 ,而温度对速度的影响可以忽略 ;当温度和压力一定时 ,纵波速度的变化呈现 3种规律 。The temperature and pressure conditions in reservoirs are simulated by experiments, the mini cores prepared after drill coring are used as object to study the relationships between compressional wave and shear wave velocities with temperature and pressure, and variation laws of the compressional wave velocity and attenuation laws of the compressional wave amplitude are also studied as they are changed with fluid saturation under certain pressure conditions. It is found in the study that the effect of pressure on velocity is over 35%, thus the pressure condition is taken into account, the effect of temperature on velocity is ignored in acoustic displacement saturation experiment, at certain range of temperature and pressure, there are 3 laws of compressional wave velocity changes, which could be used to identify gas reservoirs.

关 键 词：岩心 声学 声速 横波 纵波 高温 高压 模拟试验 

分 类 号：P584[天文地球—岩石学]