Research on a Quantitative Evaluation Method for Reservoir Damage Induced by Waterflooding Rate Sensitivity in Tight Oil Reservoirs

Zhaoyu Duan, Yongchao Xue (), Ziyao Zhang, Lan Yang and Yongji Cai
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Zhaoyu Duan: School of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
Yongchao Xue: School of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
Ziyao Zhang: The Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, China
Lan Yang: The Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, China
Yongji Cai: The Second Oil Production Plant of Chang Qing Oilfield Branch, Qingyang 710061, China

Energies, 2025, vol. 18, issue 9, 1-22

Abstract: This study was conducted to quantitatively evaluate the reservoir damage caused by waterflood-induced velocity sensitivity in the tight oil reservoirs of Block L in the Ordos Basin. This research investigated changes in reservoir pore–throat structure before and after waterflooding through laboratory experiments. A velocity sensitivity characterization model was established as R c Q = Qexp ⁡ − β v c 0 1 + λ Q η δ 2 π ϕ h v c 0 1 + λ Q η , and the injection volume as Q, and its reliability was validated using both experimental and field data. The results indicate that excessive water injection can lead to permeability damage in the reservoir. Based on this model, the optimal injection rate for Block L was determined to be 16.8 m 3 /day. Field application of this optimized rate reduced velocity sensitivity-induced particle damage by 21% and improved oil recovery by 1.4%.

Keywords: tight oil reservoirs; rate sensitivity; characterization model; critical diffusion radius; water injection optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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