Comparative Monitoring Of The Results Of Acoustic Measurements On Samples From Runovshchina Area In Atmospheric Conditions And Under Variable Pressure

Abstract

The paper presents the results of petroacoustic measurements on 48 core samples from the wells N 110 of Runovshchyna area of the Dnipro-Donets depression of Ukraine. The study of longitudinal waves velocity in samples was performed at variable pressure using Kern-4 equipment and high pressure VSC-1000 equipment. The analysis of the obtained data was carried out, and velocity of longitudinal waves under reservoir conditions was calculated. Three collections of rocks are considered, where comparative monitoring of velocity of longitudinal waves obtained both in atmospheric conditions and under variable pressure, including in PT conditions of natural occurrence of rocks is carried out. The most contrasting changes in velocities of the longitudinal waves are characteristic for individual samples, which is most likely due to closure of microcracks in the rock when compressed, and also the increased number of cracks compared to other samples. A strong correlation is established between the velocities of longitudinal waves, which are characteristic for rocks in atmospheric and reservoir conditions.