韦兰胶生物聚合物调驱技术可行性初探  

FEASIBILITY STUDY ON WEILAN GUM BIOPOLYMER USED IN PROFILE CONTROL AND OIL DISPLACEMENT

作　　者：张喜凤[1] 高怡文 王蓓蕾 车卫勤 ZHANG Xifeng;GAO Yiwen;WANG Beilei;Che Weiqin(Institute of Petroleum Engineering,Xi’an Shiyou University,Xi’an,Shanxi 710065,China;Research Institute of Shanxi Yanchang Petroleum Company(Group)Limited,Shanxi,China;Directional Well Drilling Company of CNPC Bohai Drilling Engineering Company Limited.Tianjin 300000,China)

机构地区：[1]西安石油大学石油工程学院,陕西省西安市710065 [2]陕西延长石油(集团)有限责任公司研究院 [3]中国石油渤海钻探工程公司定向井分公司

出　　处：《钻采工艺》2019年第6期98-101,I0007,共5页Drilling & Production Technology

基　　金：延长石油有限公司研究院项目“威兰胶在延长油田适应性评价”(编号:ycsy2014ky-B-7)

摘　　要：针对延长长2油藏,通过室内试验,进行了韦兰胶生物聚合物溶液调驱技术的可行性研究,评价了韦兰胶生物聚合物溶液的黏浓关系、抗温性、抗剪切性、抗盐性和黏弹性,在此基础上通过单只岩心和并联岩心的调驱实验,对韦兰胶生物聚合物溶液的注入量、注入浓度对阻力系数、残余阻力系数和驱油效率等影响进行了初步研究,结果表明,韦兰胶生物聚合物溶液属于非牛顿流体,其抗温性、抗盐性、抗剪切性良好,具有强的黏弹性。韦兰胶生物聚合物的注入浓度对调驱效果影响较大,浓度愈大,驱油效率愈高,注入量对调驱效果影响较小,当浓度为1000~3000mg/L,其阻力系数为6.2~59.6,残余阻力系数5.3~50.4,并联岩心注入调驱剂后流量变化明显(高渗区流量减小,低渗区流量显著增加),调驱效果最大增加15.4%,耐冲刷性强。韦兰胶生物聚合物可以用于延长油田长2油藏,建议注入浓度1500~3000mg/L,注入量0.3PV。The feasibility of using welan gum biopolymer solution in flooding in Yanchang Chang 2 reservoir was studied through laboratory experiment.Its viscosity-concentration relationship,temperature resistance,shear resistance,salt resistance and viscoelasticity of the solution were evaluated.And on this basis,the effects of the amount injected and the injection solution concentration on the drag coefficient,the residual drag coefficient and the oil displacement efficiency were preliminarily studied through the displacement experiments on single cores and parallel cores.The results showed that the welan gum biopolymer solution belongs to non-Newtonian fluid.It has good temperature resistance,salt resistance and shear resistance and strong viscoelasticity.The injection concentration of the welan gum biopolymer has great influence on the flooding effects.The higher injection concentration,the higher oil displacement efficiency.The injection volume has little effects on the flooding result.When the concentration is 1000mg/L^3000mg/L,the drag coefficient is 6.2~59.6 and the residual drag coefficient is 5.3~50.4.Parallel core flow changes obviously after injection of oil displacement agent,(high permeability zone flow decreases,and a significant increase in low permeability zone flow),the flooding effect is increased by 15.4%,the erosion resistance is strong.Welan gum biopolymer can be used in Yanchang Chang 2 reservoir.It is recommended that the injection concentration is 1500 mg/L to 3000 mg/L and the injection volume is 0.3PV.

关 键 词：延长 长2油藏 韦兰胶 性能 调驱 

分 类 号：TE3[石油与天然气工程—油气田开发工程]