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The AAPG/Datapages Combined Publications Database

West Texas Geological Society

Abstract


PERMIAN BASIN EXPLORATION AND PRODUCTION STRATEGIES APPLICATIONS OF SEQUENCE STRATIGRAPHIC & RESERVOIR CHARACTERIZATION CONCEPTS, 1992
Pages 156-169

Calculated Specific Gravity Entrained Mud Gas Versus Gas-Oil-Ratio from Drill Stem and Production Tests

Joe M. Nichols

Abstract

This study establishes a relationship between the calculated specific gravity of the entrained mud gas and gas to oil ratios. The process is mathematically correct, theoretically sound and can be demonstrated with properly evaluated mud logs and published materials. The process enables the mud logger to assign real and valid numbers to mud logging parameters to help the company geologist evaluate shows in real time for the purpose of drill stem testing. The quantitative data can be used to better evaluate questionable electrical log shows where formation water resistivities may be in doubt or unknown. The data can also be used to measure the effects of various secondary recovery programs by identifying depleted intervals and virgin reservoirs. Gas-oil-water contacts can also be determined with some degree of accuracy.


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