日前美国建筑企业DPR公司目前承接了苹果大楼的超级工程,应斯坦福大学的邀请,2015年11月考察团对美国DPR公司及项目进行了深入的调研与交流,了解不同项目类型和架构下BIM(Building Information Modeling)的实施策略以及基于BIM的项目管...日前美国建筑企业DPR公司目前承接了苹果大楼的超级工程,应斯坦福大学的邀请,2015年11月考察团对美国DPR公司及项目进行了深入的调研与交流,了解不同项目类型和架构下BIM(Building Information Modeling)的实施策略以及基于BIM的项目管理方法,对中国总承包企业的发展和战略规划提供思路。展开更多
Polymer gel was widely used as water shutoff agent in mature oil fields.And the results of single-phase plugging experiments show that the plugging rate of the polymer gel to the oil phase is lower than that of the wa...Polymer gel was widely used as water shutoff agent in mature oil fields.And the results of single-phase plugging experiments show that the plugging rate of the polymer gel to the oil phase is lower than that of the water phase.However,the disproportionate permeability reduction(DPR)mechanism of polymer gels still remains controversial.In this paper,we used four gel formulations including polyethyleneimine(PEI)and phenol-formaldehyde crosslinked gel with and without adding laponite to investigate the effect of gel elastic property on the water shutoff mechanism.The result of sand pack flooding experiments shown that the gel with higher elastic modulus has better effects on decreasing water cut and increasing oil recovery.After adding laponite,the elastic modulus of phenol-formaldehyde crosslinked gel increased from 64.2 Pa to 192 Pa,and the elastic modulus of PEI crosslinked gel increased from 27.4 Pa to 36.5 Pa.Compared to the phenol-formaldehyde-HAPM gel,the oil recovery of laponite-phenol-formaldehyde-HPAM gel increased by 5.2%and the maximum water cut decreased by 8.3%.Besides,comparing with PEI-HPAM gel,the oil recovery of laponite-PEI-HPAM gel increased by 2.7%and the water cut dropped by 27.8%.In the meanwhile,the laponite-phenol-formaldehyde-HPAM gel with higher elastic modulus obviously swells in the formation water but almost remains constant in oil at 105℃.The mass of gel soaked in the formation water increased from 42 g to 96 g and the gel volume increased by 300%within 48 hours.This study improves the understanding of the DPR mechanism of polymer gel for water shutoff.展开更多
文摘日前美国建筑企业DPR公司目前承接了苹果大楼的超级工程,应斯坦福大学的邀请,2015年11月考察团对美国DPR公司及项目进行了深入的调研与交流,了解不同项目类型和架构下BIM(Building Information Modeling)的实施策略以及基于BIM的项目管理方法,对中国总承包企业的发展和战略规划提供思路。
基金Distinguished Young Scholars Fund in Sichuan(Award No.2019JDJQ0036)Fok Ying-Tong Education Foundation,China(Grant No.171043)Regional Innovation Cooperation project of Sichuan Province(Award No.2020YFQ0036).
文摘Polymer gel was widely used as water shutoff agent in mature oil fields.And the results of single-phase plugging experiments show that the plugging rate of the polymer gel to the oil phase is lower than that of the water phase.However,the disproportionate permeability reduction(DPR)mechanism of polymer gels still remains controversial.In this paper,we used four gel formulations including polyethyleneimine(PEI)and phenol-formaldehyde crosslinked gel with and without adding laponite to investigate the effect of gel elastic property on the water shutoff mechanism.The result of sand pack flooding experiments shown that the gel with higher elastic modulus has better effects on decreasing water cut and increasing oil recovery.After adding laponite,the elastic modulus of phenol-formaldehyde crosslinked gel increased from 64.2 Pa to 192 Pa,and the elastic modulus of PEI crosslinked gel increased from 27.4 Pa to 36.5 Pa.Compared to the phenol-formaldehyde-HAPM gel,the oil recovery of laponite-phenol-formaldehyde-HPAM gel increased by 5.2%and the maximum water cut decreased by 8.3%.Besides,comparing with PEI-HPAM gel,the oil recovery of laponite-PEI-HPAM gel increased by 2.7%and the water cut dropped by 27.8%.In the meanwhile,the laponite-phenol-formaldehyde-HPAM gel with higher elastic modulus obviously swells in the formation water but almost remains constant in oil at 105℃.The mass of gel soaked in the formation water increased from 42 g to 96 g and the gel volume increased by 300%within 48 hours.This study improves the understanding of the DPR mechanism of polymer gel for water shutoff.
