Modifications of petroleum industry effluent treatment Method: An approach for quality improvement of process water for ASP flooding and chemical EOR

Bhatkar, Siraj; Bhadane, Nrupalraj P.; Kshirsagar, Lalitkumar K.; Wadgaonkar, Vinayak S.

doi:10.1016/j.matpr.2023.01.023

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…In order to change the current situation of high water cut in oil wells and improve oil recovery, reasonable measures must be taken to control the high permeability channels between oil and water wells [9,10]. The chemical flooding method [11][12][13][14] is widely used in oilfields to improve oil recovery because it can improve water-oil mobility [15,16] and reduce oil-water interfacial tension [15,17,18]. It is an effective and widely used method to solve the problem of high water cut and low recovery.…”

Section: Introductionmentioning

confidence: 99%

Study on the Adaptability Evaluation of Micro-Dispersed-Gel-Strengthened-Alkali-Compound System and the Production Mechanism of Crude Oil

Wang,

Wu,

Liu

et al. 2024

Processes

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A novel micro-dispersed-gel (MDG)-strengthened-alkali-compound flooding system was proposed for enhanced oil recovery in high-water-cut mature oilfields. Micro-dispersed gel has different adaptability and application schemes with sodium carbonate and sodium hydroxide. The MDG-strengthened-alkali flooding system can reduce the interfacial tension to an ultra-low interfacial-tension level of 10−2 mN/m, which can reverse the wettability of rock surface. After 30 days aging, the MDG-strengthened-Na2CO3 flooding system has good viscosity retention of 74.5%, with an emulsion stability of 79.13%. The enhanced-oil-recovery ability of the MDG-strengthened-Na2CO3 (MDGSC) flooding system is 43.91%, which is slightly weaker than the 47.78% of the MDG-strengthened-NaOH (MDGSH) flooding system. The crude-oil-production mechanism of the two systems is different, but they all show excellent performance in enhanced oil recovery. The MDGSC flooding system mainly regulates and seals micro-fractures, forcing subsequent injected water to enter the low-permeability area, and it has the ability to wash the remaining oil in micro-fractures. The MDGSH flooding system mainly removes the remaining oil on the rock wall surface in the micro-fractures by efficient washing, and the MDG particles can also form weak plugging of the micro-fractures. The MDG-strengthened-alkali flooding system can be used as an alternative to enhance oil recovery in high-water-cut and highly heterogeneous mature oilfields.

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