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首页> 外文会议>Society of Petroleum Engineers Enhaneed Oil Recovery Conference >Laboratory Tests with CO2, N2 and Lean Natural Gas in a Naturally Fractured Gas-Condesate Reservoir under HP/HT Conditions
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Laboratory Tests with CO2, N2 and Lean Natural Gas in a Naturally Fractured Gas-Condesate Reservoir under HP/HT Conditions

机译：在HP / HT条件下，在天然碎气冷凝水储层中使用CO2，N2和瘦天然气的实验室测试

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The study of gas-condensate reservoirs has been a fruitful field of research in the last years because of their peculiar behaviour. Gas cycling is the recovery process of choice for gas-condensate reservoirs but this process can often not be implemented because of economic reasons. Nitrogen is a potential alternative injection gas. Nevertheless, this has also disadvantages. The application of these processes is more complex in the offshore sites. This paper describes laboratory studies performed to evaluate the effectiveness of some gases (CO2, N2, lean natural gas) in displacing condensate from naturally fractured gas-condensate reservoirs (offshore field). Numerous hurdles had to be overcome. The experiments represented the behavior of a reservoir under HP/HT conditions, 334 F and 8455 psia. The o results of CO2 and natural depletion showed little difference in their ability to recover condensate. The natural gas raised the recovery of the light fraction, but, by contrary, the addition of N2 made evident to be less effective than the rest. The residual saturations and condensate recovery were measured and the results are presented. The detailed analyses revealed that natural gas seems to have been more effective in recovering condensate. Under these conditions, condensate recovery will significantly increase if the lean natural gas is injected. The answers are in agreement with the simulation model. The conclusions are relevant to the overall management of gas-condensate reservoir. These experiments will serve as a guideline to develop the long term corporate strategy to improve additional recoveries in Mexico.
机译：由于其特殊的行为，对气体冷凝水储层的研究是在过去几年中的富有成效的研究领域。气体循环是气凝储储层的首选的恢复过程，但这种过程通常不能由于经济原因而实施。氮是潜在的替代注射气体。尽管如此，这也有缺点。这些过程的应用在近海地点更复杂。本文介绍了对从天然碎气冷凝水储存器（海上场）的凝结物中取代冷凝物中的一些气体（CO2，N2，瘦天然气）的实验室研究。必须克服众多障碍。实验代表了HP / HT条件下储层的行为，334f和8455psia。 CO2和天然耗尽的O结果表明它们恢复冷凝物能力的差异很小。天然气升高了光分数的回收，但相反，添加N2的添加是明显的，而不是其余的效果。测量残留饱和和冷凝物恢复并呈现结果。详细分析显示，天然气似乎在回收冷凝物方面似乎更有效。在这些条件下，如果注射贫天然气，缩合物恢复将显着增加。答案与模拟模型一致。结论与气凝液储层的整体管理有关。这些实验将作为制定长期企业战略以改善墨西哥额外复苏的指导方针。

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