Bài viết trình bày giải pháp để nâng cao sản lượng khai thác của giếng C-2P mỏ X bằng giải pháp lắp đặt và hạ sâu van gaslift thông qua bộ thiết bịtubingpack off. Kết quả áp dụng giải pháp cho thấy, sản lượng khai thác của giếng đã tăng lên đáng kể (0,354 triệu thùng dầu) trong năm đầu tiên áp dụng giải pháp. | 94 Journal of Mining and Earth Sciences Vol. 64 Issue 5 2023 94 - 108 Solutions to increase the C-2P well production performance at X oil field Block 09-2 Khoan Duy Do 1 Thinh Van Nguyen 2 1 PetroVietnam Exploration Production Corporation Hanoi Vietnam 2 Hanoi University of Mining and Geology Hanoi Vietnam ARTICLE INFO ABSTRACT Article history The well C-2P had its first oil production in July 2008 the initial Received 04th May 2023 production rate is 3 000 barrels day. Due to the reservoir pressure Revised 06th Sept. 2023 depletion in 2017-2018 the well faced difficulties in kicking off to open the Accepted 30th Sept. 2023 well for production. In November 2018 when the C-5PST2 well was put Keywords into production the C-2P well was not produced by natural flowing. The Gaslift kicking off has been attempted many times but the well still won t flow. Deeping the gaslift valve The main reason the well couldn t flow is due to low reservoir pressure which has not enough energy to push all the fluid in the well to the surface Tubing Pack off after each well shutdown. The flow assurance study shows at the X oil field. reservoir pressure of 3 000 Psi and tubing head pressure of 950 Psi the well can t flow naturally. In addition with the reservoir pressure of 3 000 psia and applying the gaslift injection rate of MMscf d injection point at 3 030 mTVD the well flowed. The continuous gaslift pump helps maintain the well s production in case the reservoir pressure drops even lower to 2 000 psi and at the same time optimizing the gaslift pump flow helps to increase the well production by 100-300 barrels of oil day. When the reservoir pressure drops lower it is necessary to lower the gaslift valve deeper to continue kicking off the well and maintain the well production performance. On the other hand due to the lack of a gaslift valve for the original design of C-2P well so it s necessary to have gaslift tubing pack off in order to bring the well back to production maintain .
