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Mud Gas and Carbon Isotope Profiles in Well M,Offshore Guinea Bissau

	International Journal of Scientific Research and Engineering Development (IJSRED)	Full Text:
	Published Issue : Volume-4 Issue-2
	Year of Publication : 2021
	Unique Identification Number : IJSRED-V4I2P37
	Authors : Selegha Abrakasa, Nnodi Okechukwu, Sam Edikan, Fortune Chiazor
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Abstract :

The mudgas profile was delineated for well M, gas samples were obtained using a gas extractor which is a stand alone modular system. A Station for acquisition, resolution and peak integration was employed.The maturity of the mudgas for this study ranges from –40‰ to –55‰, corresponding to 3200m to 3000m. Gases above 3000m are immature.Isotopic reversal observed at 2300m is attributed to marine regression. Diffusive migration was delineated as themigratory pattern with mixing tendencies of biogenic and thermogenic gases. The methane profile showed isotopic rollover at about 2200m, isotopic reversals were also observed at the same depth. The potential for biodegradation is higher at 2500m and shallower depths.