The Types and Mechanisms of Shahe Street Reservoir Damage in KL10-1 Oilfield
Download as PDFDOI: 10.23977/fpes.2023.020103 | Downloads: 6 | Views: 528
Author(s)
Xinliang Wang 1, Honghua Zhu 2, Xu Chen 1, Qiang Ren 1, Kai Yang 1
Affiliation(s)
1 CNOOC EnerTech-Drilling & Production Co., Tianjin, 300452, China
2 CNOOC Tianjin Branch Company, Tianjin, 300459, China
Corresponding Author
Xinliang WangABSTRACT
From 2016 to 2022, the productivity recovery rate of oil well in KL10-1 oilfield continued to decline after the workover operation, and the complex treatment situations increased continuously which caused by the high temperature and corrosion issues since 2018, that multiple wells had been scaling in the downhole central tube, which resulted in extended downtime, annual total production decline of single well and high costs. Through the analysis of reservoir properties, subsurface fluid properties, and rock surface physical chemical characteristics, the article finds that the wells with productivity recovery rate are mainly concentrated in the Es formation which has low-to-moderate permeability and high wax content. The reason is that the inherent potential damage factors of the formation are induced by various external conditions, such as water lock damage and inorganic scale accompany the whole development and production process of the oilfield, as well as wax deposition in the low-to-moderate water cut stage are the main risk factors that cause the absolute permeability or relative permeability of the reservoir decrease significantly, and the oil well production decline.
KEYWORDS
KL10-1oilfield, workover, Es formation, productivity recovery rate, reservoir damage, water lock, wax deposit, inorganic scaleCITE THIS PAPER
Xinliang Wang, Honghua Zhu, Xu Chen, Qiang Ren, Kai Yang, The Types and Mechanisms of Shahe Street Reservoir Damage in KL10-1 Oilfield. Frontiers in Power and Energy Systems (2023) Vol. 2: 15-25. DOI: http://dx.doi.org/10.23977/fpes.2023.020103.
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