Based on deep analysis of ASP/oil emulsions flow behavior characteristic,a mathematical description of non-Newtonian emulsion was developed,and variation of rheological behaviors along the percolation flow direction w...Based on deep analysis of ASP/oil emulsions flow behavior characteristic,a mathematical description of non-Newtonian emulsion was developed,and variation of rheological behaviors along the percolation flow direction was given.The effects of emulsions rheological behavior on oil recovery were quantity researched by a 2-D positive rhythm profile geological model.The result shows that the high viscosity and reduction of water phase permeability by emulsification can improve low-middle layer flow rate and enhance sweep efficiency,and the enhancement degree is related with emulsification degree.The study result can be used as reference for scheme design and production performance forecast during ASP flooding.展开更多
A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)processes.The objective of this review is to g...A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)processes.The objective of this review is to gain a general outlook and insight from coreflood experiments injecting SP or ASP slug as tertiary recovery.The discussion is separated into sections based on relevant core and fluid properties as well as surfactant selection and SP/ASP slug design and their impact on incremental recovery.Most studies in this review have been published within the last twenty years but few older coreflood works have been included for benchmarking.Parameters in each reviewed study have been summarized in tables to help readers gain detailed observation.Lessons learned from these past experiments should help other chemical EOR practitioners or students of the field in benchmarking or improving the outcomes of their future SP/ASP experiments.展开更多
基金Project(2005CB221300) supported by the Major State Basic Research Development Program of China
文摘Based on deep analysis of ASP/oil emulsions flow behavior characteristic,a mathematical description of non-Newtonian emulsion was developed,and variation of rheological behaviors along the percolation flow direction was given.The effects of emulsions rheological behavior on oil recovery were quantity researched by a 2-D positive rhythm profile geological model.The result shows that the high viscosity and reduction of water phase permeability by emulsification can improve low-middle layer flow rate and enhance sweep efficiency,and the enhancement degree is related with emulsification degree.The study result can be used as reference for scheme design and production performance forecast during ASP flooding.
文摘A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)processes.The objective of this review is to gain a general outlook and insight from coreflood experiments injecting SP or ASP slug as tertiary recovery.The discussion is separated into sections based on relevant core and fluid properties as well as surfactant selection and SP/ASP slug design and their impact on incremental recovery.Most studies in this review have been published within the last twenty years but few older coreflood works have been included for benchmarking.Parameters in each reviewed study have been summarized in tables to help readers gain detailed observation.Lessons learned from these past experiments should help other chemical EOR practitioners or students of the field in benchmarking or improving the outcomes of their future SP/ASP experiments.
文摘通过分析三元复合驱油体系下硅垢的形成机理,设计合成了新型硅防垢剂SY-KD.SY-KD是由丙烯酸(AA)和对甲基烯丙基氧基苯磺酸(MBS)共聚形成的高分子(CAABS)与2-膦酸丁烷-1,2,4-三羧酸(PBTC)复配的混合物.SY-KD中羧基官能团通过氢键相互作用与原硅酸分子或其二聚体发生键合,由于SY-KD分子链的空间位阻效应,阻止了原硅酸分子或二聚体进一步聚合形成二氧化硅.室内研究结果表明,SY-KD各组分对于硅垢的阻垢能力主要是通过阻聚、吸附分散以及对不溶性SiO2的溶蚀作用来实现的,是一种很好的三元复合驱阻垢剂.SY-KD防垢剂使结垢油井平均检泵周期由50 d左右增加到300 d.
