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Investigating the Behavior of Low Permeable Lean and Rich Gas Condensate Reservoirs

Author : Sohail Nawab, Abdul Haque Tunio, Aftab Ahmed Mahesar and Imran Ahmed Hullio

Pages : 1542-1547, DOI:
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The producing behavior of low permeable gas condensate reservoirs is dramatically different from that of conventional reservoirs and requires a new paradigm to understand and interpret it. As the reservoir pressure initiates to decline and reaches to dew point pressure of the fluid then the condensate is formed and causes the restriction in the flow in the reservoir rock which results, decrease in the well productivity near the wellbore vicinity which is known as condensate blockage. Henceforward, it is better to understand the behavior of the low permeable lean and rich gas condensate reservoirs by several perspectives through the compositional simulator. Besides this study involves the following perspectives; the increase in the number of wells and by varying the flowrate of the gas in six different cases for low permeable lean and rich gas condensate reservoirs. It was concluded that low permeable lean and rich gas condensate reservoirs have similar gas recovery factors. Whereas the CRF plays inverse behavior for both reservoirs as CRF is maximum for lean gas condensate at single producing well but for rich gas condensate reservoir the CRF increases as the number of wells escalates. Additionally, in second effect the varying gas flowrates lean gas condensate reservoir has maximum CRF at lesser flowrate but it is opposite for the low permeable rich gas condensate reservoir, for single or two producing wells the flowrate effect plays but when the number of wells is increasing there is not any significant change in CRF

Keywords: Low permeable, Lean gas condensate reservoir, Rich gas condensate reservoir, Compositional Simulation, Gas recovery factor, Condensate recovery factor.

Article published in International Journal of Current Engineering and Technology, Vol.8, No.6 (Nov/Dec 2018)

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