Investigating changes of static pressures and gas injection efficiency project in Asmari-Pabdeh reservoir in one of the fields in southwest Iran using ArcGIS software
Subject Areas : Petroleum GeologySeyed Ehsan Ebrahimi 1 , Bahman Soleimani 2 *
1 - Dept. of Petroleum Geology and Sedimentary Basins, Shahid Chamran University of Ahvaz
2 - Prof. of the Department of Petroleum Geology and Sedimentary Basins, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
Keywords: Asmari reservoir, oil recovery, hydrodynamic map, gas injection, drive mechanism, ArcGIS software,
Abstract :
One of the most important characteristics of a reservoir is the pressure of hydrocarbon fluids, which plays a very important role in the daily production and the final recovery rate of hydrocarbons. Therefore, knowing the pressure changes of each field over time is very important in the management and development of the reservoir. In the present study, the subsurface data of Asmari-Pabdeh reservoir in 30 wells of one of the oil fields in the southwest were used. In this research, geological data; Petrophysical parameters; fluid contact surfaces; production history from the reservoir; drawing hydrodynamic maps; And the ratio of gas to oil production (GOR) was investigated in the ArcGIS software environment.
Using ArcGIS 9.2 software, the oil pressure on the surface of the field and over time for different years, including the period before and after the gas injection project, was investigated and it was concluded that the carbonate reservoir of this field has many fractures and with Paying attention to the amount of fractures, their expansion as well as porosity and permeability, different parts of the field have a very good fluid connection with each other, fluid pressure in the whole field is almost uniform and has minor changes. Due to the natural drift mechanism of the field, the pressure drop resulting from the production was severe, but the efficiency of the gas injection project was successful in a way that it has been very effective in maintaining the pressure and increasing oil recovery. Hydrodynamic force is the most important factor in the fluid displacement mechanism for hydrocarbon production and is one of the effective mechanisms with a high recovery factor. This type of studies can be a useful and powerful tool for managing the production and development and control of extraction of oil and gas reservoirs.
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