Abstract
Block M, an extra-heavy oil reservoir located in the Orinoco Heavy Oil Belt, presents foamy oil flow characteristics. It has been developed with clustered horizontal wells via foamy oil cold production, which is different from conventional solution-gas drive regarding to driving mechanism and production performance features. Based on the study of foamy oil driving mechanism via laboratory experiments, combined with production performance analysis and reservoir engineering evaluation, systematic investigation on cold production in Block M has been conducted. The study shows high initial production rate and slow rise of GOR in the early production stage. Production rate presents different exponential decline tendency at different production stages. Production performance is affected by horizontal section length of oil layer encountered, reservoir buried depth, net-pay thickness, reservoir properties and heterogeneity. With increase of horizontal section length of oil layers encountered, reservoir buried depth and net-pay thickness, production rate increases and decline rate goes down. Additionally, reservoir heterogeneity along the horizontal well has a significant effect on cold production. According to these understandings, horizontal well deployment and production parameters have been optimized, which improved cold production performance.
Copyright 2019, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2019 International Field Exploration and Development Conference in Xi’an, China, 16–18 October, 2019.
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The project is supported by National Science and Technology Major Projects (Number 2016ZX05031).
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Shen, Y., Li, Xm., Yang, Zp., Shi, Xx. (2020). Production Characteristics and Affecting Factors of Cold Production with Horizontal Wells in Extra Heavy Foamy Oil Reservoir. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2019. IFEDC 2019. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-2485-1_99
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DOI: https://doi.org/10.1007/978-981-15-2485-1_99
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