Dual Completion Technology and Effect Analysis of Multi-layer Sandstone Reservoir in South America

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Abstract

Multi-layer oil reservoirs developed in CNPC’s operation block in South America, and it is not allowed to conduct multi-layer combined produc¬tion according to the regulations of the resource country. In view of the actual situation of low production degree of Multi-layer Reservoir, in order to improve the production of individual well and multi-layer production efficiency, dual com¬pletion technology is innovatively adopted. In this paper, the feasibility of dual completion technology is demonstrated, the principle, advantages and string struc¬ture of dual completion technology are introduced, and the production effect of dual completion is analyzed. The results showed that in multi-layer reservoirs, the average permeability of the reservoir is 758~838 mD, and the coefficient of permeability variation is 0.36~0.46. Dual completion is feasible. The production performance of dual completion well shows that the production of individual well ranges from 218 bbl/d to 1982 bbl/d. At the same time, the economic benefit is remarkable, and the operation investment was recovered in only 4 months. Then an existed well and a new well were conducted for dual completion, and good results were also achieved. The dual completion technology is adopted for the multi-layer developed reservoir, which realizes the separate measurement of each layer, not only meets the policy requirements of the resource country, but also improved the production of individual well. Through the simultaneous produc¬tion of multiple layers, the cycle of individual-layer production is shortened, and good development effect and remarkable economic benefits are obtained, which provides a reference for the multi-layer production of the same type of reservoir.

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Liu, J., Xu, X. L., Wan, X. P., Chen, W., Liu, X. Q., Qi, M., … Geng, X. Y. (2023). Dual Completion Technology and Effect Analysis of Multi-layer Sandstone Reservoir in South America. In Springer Series in Geomechanics and Geoengineering (pp. 4946–4954). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-981-99-1964-2_422

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