Reservoir characterization, volumetric, and three-dimensional geostatistical modeling of the Grand Tower Limestone in Salem Field, Southern Illinois

Khosravi, Mansour

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https://hdl.handle.net/2142/118079 Copy

Description

Title

Reservoir characterization, volumetric, and three-dimensional geostatistical modeling of the Grand Tower Limestone in Salem Field, Southern Illinois

Author(s)

Khosravi, Mansour

Issue Date

2023

Keyword(s)

oil reservoir characterization

Abstract

Since the discovery of Salem Field in 1938 in south-central Illinois, the field has produced more than 400 million barrels of oil from formations ranging from Mississippian to Ordovician age. The main producing Devonian intervals are dolomitized zones of the Grand Tower Limestone with intercrystalline, moldic, and vuggy porosities. To date, more than 600 wells have been drilled and completed in the formation, covering an area of 10 mi2 (25.8 km2). From 1938 to 1940, initial production from these wells reached a producing rate of approximately 2,030 barrels of oil per day. However, the rates declined to less than 31 barrels of oil per day for those wells completed from 2010 through 2014. The objectives of this study were to generate detailed 3-D geocellular models to characterize the porosity and water saturation trends, estimate the original hydrocarbon in place, and identify potential areas for future secondary and tertiary enhanced oil recovery plans. Wireline logs, well cuttings, and a limited number of core samples from neighboring fields were utilized to delineate two-dimensional and three-dimensional structural and stratigraphic frameworks of the reservoir.

Publisher

Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute.

Series/Report Name or Number

Circular no. 610

Type of Resource

text

Language

en

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