To solve the problem whereby an oil reservoir with applicable boundaries of the current sand-inhibiting and water-control agent is unclear,a supramolecular sand-inhibiting and water-control agent PDKM was prepared usi...To solve the problem whereby an oil reservoir with applicable boundaries of the current sand-inhibiting and water-control agent is unclear,a supramolecular sand-inhibiting and water-control agent PDKM was prepared using acrylamide(AM),methacryloxyethyltrimethyl ammonium chloride(DMC),styrene(SM),and γ-methacryloyloxypropyltrimethoxysilane(KH570)as comonomers.The molecular structure of PDKM was verified by ^(1)H-NMR and FT-IR.On the basis of establishing an evaluation method that can screen the performance of sand-inhibiting agent at a flow rate of 100 mL/min,the oil reservoir applicable boundaries of PDKM were obtained through the evaluation of sand-inhibiting and water-control performance.The experimental results show that when the concentration of PDKM is 5000 mg/L,the oil reservoir conditions are temperature≤90℃,formation water salinity≤21,249 mg/L,the degree of sand production corresponding to slight sand production and particle migration,crude oil viscosity≤50 mPa⋅s,primary water flooding water cut≥75%,and formation permeability contrast≤2.The performance with respect to sand inhibiting and water control can all reach an excellent level.There-fore,the PDKM solves the problem whereby the applicability of the current sand-inhibiting and water-control agent is unclear,and provides direction for the selection of suitable products in the oilfield production site.展开更多
基金supported by the National Natural Science Foundation of China(General Program)(Grant No.52474071)the Provincial Key R&D Program of Shandong(2022CXGC020303)the financial support from the China Scholarship Council(TM Lei,Grant No.202406450004).
文摘To solve the problem whereby an oil reservoir with applicable boundaries of the current sand-inhibiting and water-control agent is unclear,a supramolecular sand-inhibiting and water-control agent PDKM was prepared using acrylamide(AM),methacryloxyethyltrimethyl ammonium chloride(DMC),styrene(SM),and γ-methacryloyloxypropyltrimethoxysilane(KH570)as comonomers.The molecular structure of PDKM was verified by ^(1)H-NMR and FT-IR.On the basis of establishing an evaluation method that can screen the performance of sand-inhibiting agent at a flow rate of 100 mL/min,the oil reservoir applicable boundaries of PDKM were obtained through the evaluation of sand-inhibiting and water-control performance.The experimental results show that when the concentration of PDKM is 5000 mg/L,the oil reservoir conditions are temperature≤90℃,formation water salinity≤21,249 mg/L,the degree of sand production corresponding to slight sand production and particle migration,crude oil viscosity≤50 mPa⋅s,primary water flooding water cut≥75%,and formation permeability contrast≤2.The performance with respect to sand inhibiting and water control can all reach an excellent level.There-fore,the PDKM solves the problem whereby the applicability of the current sand-inhibiting and water-control agent is unclear,and provides direction for the selection of suitable products in the oilfield production site.
