Data-Driven Modelling of Natural Gas Dehydrators for Dew Point Determination
Aniefiok Lawrence Ukpong,
Ise Ise Ekpoudom,
Eddie Achie Akpan
Issue:
Volume 5, Issue 3, May 2017
Pages:
27-33
Received:
21 February 2017
Accepted:
6 March 2017
Published:
22 April 2017
Abstract: The presence of water in natural gas stream is a recurring problem that the oil and gas industry have been dealing with over the years. Failure to remove water vapor from natural gas stream leads to the formation of hydrates and corrosion of critical facilities. Determination of natural gas dew point which is the temperature at which water vapor condenses out of natural gas is a tricky endeavor, hence there is need to explore modern and more effective ways of determining the dew point. In this research, data driven modeling technique is utilized to generate an expression for the Dew Point of a Natural Gas stream exiting a Molecular Sieve Dehydrator Bed. After data quality analysis, various model structures were utilized for modeling. The Autoregressive Moving Average with exogenous inputs model proved its suitability for predicting the plant output with a highest level of accuracy.
Abstract: The presence of water in natural gas stream is a recurring problem that the oil and gas industry have been dealing with over the years. Failure to remove water vapor from natural gas stream leads to the formation of hydrates and corrosion of critical facilities. Determination of natural gas dew point which is the temperature at which water vapor co...
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Study on Alkaline Flooding System with Antiscaling Effect
Tang Mingguang,
Liu Qinghua,
Zhang Fengbo,
Wang Shichao,
Lu Ruibin
Issue:
Volume 5, Issue 3, May 2017
Pages:
34-38
Received:
27 March 2017
Accepted:
8 April 2017
Published:
24 May 2017
Abstract: For scaling problem in the alkaline flooding, the alkali with anti scaling effect was researched. The results show that scale inhibition effect of PAPEMP alkaline system (containing polyamino polyether methylene phosphonae, NaOH, NaBO2) is better than PASP alkaline system (containing sodium of polyaspartic acid, NaOH, NaBO2), When the concentration of the PAPEMP alkaline system is larger than 4%, it could tolerate the solution with calcium ion concentration of 500mg/L without scaling; both NaBO2 and PAPEMP alkaline system have good displacement efficiency. During the displacement process, a large differential pressure response appears when alkali concentration is high, and the incremental oil recovery increases with the increase of alkaline concentration. Microscopic mechanisms show that the alkaline solution penetrates into the crude oil and water drops are formed inside the oil phase, subsequently, to turn into the W/O emulsion, which could block the water channel and inhibit the viscous fingering, leading to the improvement of sweep efficiency.
Abstract: For scaling problem in the alkaline flooding, the alkali with anti scaling effect was researched. The results show that scale inhibition effect of PAPEMP alkaline system (containing polyamino polyether methylene phosphonae, NaOH, NaBO2) is better than PASP alkaline system (containing sodium of polyaspartic acid, NaOH, NaBO2), When the concentration...
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