Seismic Time Fractal Dimension for Characterizing Shajara Reservoirs of The Permo – Carboniferous Shajara Formation, Saudi Arabia
Journal Title: Modern Approaches in Oceanography and Petrochemical Sciences - Year 2018, Vol 2, Issue 1
Abstract
The quality and assessment of a reservoir can be documented in detail by the demonstration of seismic time. This research aims to calculate fractal dimension from the relationship among seismic time, maximum seismic time and wetting phase saturation and to approve it by the fractal dimension derived from the relationship among capillary pressure and wetting phase saturation. In this research, porosity was measured on real collected sandstone samples and permeability was calculated theoretically from capillary pressure profile measured by mercury intrusion contaminating the pores of sandstone samples in consideration. Two equations for calculating the fractal dimensions have been employed. The first one defines the functional relationship between wetting phase saturation, seismic time, maximum seismic time and fractal dimension. The second equation involves to the wetting phase saturation as a function of capillary pressure and the fractal dimension. Two procedures for obtaining the fractal dimension have been utilized. The first procedure was done by plotting the logarithm of the ratio between seismic time and maximum seismic time versus logarithm wetting phase saturation. The slope of the first procedure = 3- Df (fractal dimension). The second procedure for obtaining the fractal dimension was determined by plotting the logarithm of capillary pressure versus the logarithm of wetting phase saturation. The slope of the second procedure = Df -3. Based on the obtained results of the fabricated stratigraphic column and the attained values of the fractal dimension, the sandstones of the Shajara reservoirs of the Shajara Formation were divided here into three units. The gained units from bottom to top are: Lower Shajara seismic time Fractal Dimension Unit, Middle Shajara seismic time Fractal dimension Unit, and Upper Shajara seismic time Fractal Dimension Unit. The results show similarity between seismic time fractal dimension and capillary pressure fractal dimension. It was also noted that samples with wide range of pore radius were characterized by high values of fractal dimensions due to an increase in their connectivities. In our case, and as conclusions the higher the fractal dimension, the higher the heterogeneity, the higher the permeability, the better the reservoir characteristics.
Authors and Affiliations
Khalid Elyas Mohamed Elameen Alkhidir
Keywords
Related Articles
- EP ID EP626096
- DOI 10.32474/MAOPS.2018.02.000128
- Views 57
- Downloads 0
The Adsorption of Organic Pollutants by Gemini Surfactant-Modified Montmorillonite from Water
Water is a very important resource to human life and the development of society. But large amounts of natural and anthropogenic organic substances are constantly discharged to water bodies. The serious problem of water p...
Impact Study of the Tropical Cyclone “Kirrily” to the Southeast Mollucas & West Papua Areas on 26-29 April 2009
Tropical cyclone could be one of the weather phenomenons that it developed in the low latitudes or near the equator line. One of rare occurrence of tropical cyclone in the low latitude would be generated and developed ov...
UV Protective Pigments and Growth Abnormalities during Light and Heat Stress of Maldivian Corals
During one of the recent visits in Dec. 2015 on Angaga (Ari Atoll, Maldives) the authors found a badly damaged reef devastated by bleaching-events as well as starfish coral predation. Nonetheless, some huge mono-specific...
Low Temperature Engineering for Sea Protection
Cryogenics is an applying science which deals with low temperatures. Ed this branch of engineering is of a great importance in the field of sea preservation from different substances, which are not friendly with sea envi...
Total Petroleum Hydrocarbon Degradation and BTEX Leaching in Soils after Application of Oil-Base Drilling Mud: Impact of Application Rate, Rainfall Regime, and Time
Increases in oil and gas drilling have resulted in large quantities of oil base “mud” (OBM) to be disposed of. Land application of OBM to agricultural land is a common disposal technique that presents agronomic and envir...