Effect of Foaminess on the Performance of Solution Gas Drive in Heavy Oil Reservoirs

Alshmakhy, A.B.; Maini, B.

doi:10.2118/2007-130

Cited by 2 publications

(1 citation statement)

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“…Although cold production has the advantages of low investment and simple operation, it is not widely applied in heavy oil reservoir development because of its extremely low recovery (usually less than 5%). However, solution gas drive in some heavy oil reservoirs in Venezuela, Canada, and China showed unexpectedly good performance, including high primary recovery, low production gas-oil ratio, and slow reservoir pressure decline, which aroused 2 of 19 people's attention [2][3][4][5][6]. If the anomalous cold production method can be popularized and applied, it will promote the development of heavy oil reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Mechanism Analysis of the Effect of Oil Viscosity and Asphaltene on Foamy Oil

Wang

2019

Energies

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Foamy oil is considered an important reason for the anomalous performance in depletion development for some heavy oil reservoirs, but its influence factors remain to be fully investigated. In order to determine the effect of oil viscosity and asphaltene on foamy oil, ten oil samples including two types (deasphalted oil and asphaltenic oil) and five viscosities were used in the work. On this basis, depletion experiments were conducted in a sandpack and microscopic visualization model. Then, viscoelastic moduli of the oil–gas interface were measured to analyze the mechanisms of viscosity and asphaltene of foamy oil from the perspective of interfacial viscoelasticity. Results show that, with the decrease of the oil viscosity, the foamy oil performance in depletion development worsened, including a rapider decline in average pressure, earlier appearance of gas channeling, shorter period of foamy oil, and lower contribution of foamy oil to recovery. Asphaltene had an influence on foamy oil only in the viscosity range between 870 mPa∙s and 2270 mPa∙s for this study. The effect of viscosity and asphaltene on foamy oil can be explained by the viscoelasticity of bubble film. With the increase of oil viscosity, the interfacial viscous modulus increases significantly, indicating the bubble film becomes stronger and more rigid. Asphaltene, like armor on the bubble film, can improve the viscoelastic modulus, especially at lower viscosity. This can inhibit the coalescence of micro-bubbles and increase the possibility of splitting. This work identifies the effects of oil viscosity and asphaltene on foamy oil systematically and provides theoretical support for foamy oil production.

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Section: Introductionmentioning

confidence: 99%

Experimental Study and Mechanism Analysis of the Effect of Oil Viscosity and Asphaltene on Foamy Oil

Wang

2019

Energies

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Analysis of the First CHOPS Pilot for Heavy Oil Production in Kuwait

Sanyal

Al-Sammak

2011

All Days

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Heavy oil contribution is considered a key requirement for delivering the challenging 2030 strategic production targets of Kuwait. Different production technologies have been considered for meeting this challenge. Initially the cold production technology of CHOPS (Cold Heavy Oil Production with Sand) has been tried through a pilot. The present paper summarizes the performance of the first CHOPS pilot performance and analysis of the pilot results. The analysis of the performance data from the pilot provides important clue for understanding the reservoir description issues as well as sand production characteristics. The result of the study has relevance for sand management strategies in the planned future thermal development of the field as well. The wealth of information available from the pilot helps developing an improved dynamic reservoir description. The paper demonstrates that the CHOPS process has an intimate relationship with rock mechanics, fluid viscosity and the flow potential of the formation. It is also demonstrated how the field surveillance data can be used to investigate the enigmatic subject of "Foamy Oil" (Alshmakhy et al. 2007). The results can also help in developing an improved completion strategy for the wells, especially in the area of sand management. The paper provides important field performance data and analysis of the CHOPS pilot performance from Kuwait that can be used for taking decisions on applicability of the process in other similar reservoir set ups. The analysis also helps firming up an optimized sand management strategy for this reservoir.

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Effect of Foaminess on the Performance of Solution Gas Drive in Heavy Oil Reservoirs

Cited by 2 publications

References 10 publications

Experimental Study and Mechanism Analysis of the Effect of Oil Viscosity and Asphaltene on Foamy Oil

Experimental Study and Mechanism Analysis of the Effect of Oil Viscosity and Asphaltene on Foamy Oil

Analysis of the First CHOPS Pilot for Heavy Oil Production in Kuwait

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