摘要
以岩石物理理论为基础,在变温、变压条件下对塔河油田志留系和泥盆系岩样进行超声波纵、横波速度及密度测定,岩石物理试验表明塔河油田饱水岩样、饱油岩样和泥岩,纵波速度和横波速度都具有很好的线性关系,岩石的纵横波速度均随着温度压力的增加而增大。干岩石以及饱含水岩石的纵横波速度均随着岩石孔隙度的增加而变小。采用Shuey近似理论,根据测定的岩石物理参数,进行了AVO正演模拟,结果表明塔河地区研究目的层的AVO异常类型属于第一类。
Based on the petrophysics theory,the authors measured the samples from the Silurian-Devonian Tertiary formation in the Tahe oilfield for ultrasonic compressional and shear wave velocities in rocks under the conditions of various temperatures,pressures and densities.The results show that the compressional and shear wave velocities show linear relationship in mudstone and sandstone fully saturated with water and oil.The rock velocities increase with the increasing temperature and pressure,whereas the rock velocities decrease with the increasing porosity in dry core samples and sampls saturated with water.According to Shuey＇s approximation,AVO forward modeling was conducted on the basis of petrophysical parameters.It is indicated that the AVO abnormal responses from Silurian-Devonian reservoir property belong to Class One in the Tahe orefield.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第2期183-187,共5页
Geophysical and Geochemical Exploration
基金
国家重大科技攻关基金资助(2008ZX05002-003-006)
