Density - Velocity Relationship and Prediction of Lithology Variation Using Physical Analysis in Kf-4 Well of The Kifl Oil Field, Yamama Formation, South of Iraq

Abdulaziz R Alobaidy,Ahmed S Al-Banna

doi:10.24996/ijs.2021.62.10.18

Abstract

The density-velocity relation is an important tool used to predict one of these two parameters from the other. A new empirical density –velocity equation was derived in Kf-4 well at Kifl Oil Field, south of Iraq. The density was derived from Gardner equation and the results obtained were compared with the density log (ROHB) in Kl-4 well. The petrophysical analysis was used to predict the variations in lithology of Yamama Formation depending on the well logs data, such as density, gamma, and neutron logs. The physical analysis of rocks depended on the density, Vp, and Vs values to estimate the elastic parameters, i.e. acoustic impedance (AI) and Vp/Vs ratio, to predict the lithology and hydrocarbon indicators. According to the results of physical properties, Yamama Formation is divided into five units in Kf-4 well at Kifl Oil Field. The lithology of Yamama Formation was found to consist of limestone, dolomite, shale, and anhydrite rocks.

Highlights

Density and velocity are considered as fundamental properties of rocks material
Density can be obtained from seismic data by seismic inversion and geostatistical methods, where non-linear, linear, and multi-linear relationships between the rock properties and well logs seismic data are calculated at the well location [3]
Rock physical diagnostic properties of depositional texture were used to confirm the results of the petrophysical analysis and to minimize errors in prediction and interpretation [5]

Summary

Introduction

Density and velocity are considered as fundamental properties of rocks material. These properties are determined by laboratory and field measurements to explain the geometry of the geological units of the earth. ‫علاقة الكثافة – والدرعة والتنبؤ بتغير الصخارية لتكوين اليمامة باستخدام تحليل الخصائص‬ ‫الفيزيائية في البئر‬Kf-4‫ جنوب الع ارق‬،‫في حقل الكفل النفطي‬ ‫ في حقل الكهفة النفطي‬Kf-4 ‫استنباط معادلة بين الكثافة والدخعة في بئخ‬ ‫تكهين اليمامة بالاعتماد على مجدات الابار مثل الكثافة والكاما والنيتخون‬

Results

Conclusion