朝阳沟油田特高含水期选择性化学堵水剂配方优选  

Optimization of Chemical Selective Water Plugging Agent in Chaoyang Trench Oil Field in High Water Cut Stage

作　　者：曹广胜[1] 何奇[1] 周芷仪 白玉杰 李世宁[1] 王培伦[1] 

机构地区：[1]东北石油大学提高采收率教育部重点实验室,黑龙江大庆163000 [2]大庆油田有限责任公司第一采油厂,黑龙江大庆163000

出　　处：《石油化工高等学校学报》2017年第6期42-47,共6页Journal of Petrochemical Universities

基　　金：国家自然科学基金资助项目(51574089)

摘　　要：针对朝阳沟油田高液量高含水井的地质特点,通过测定体系成胶强度、成胶时间、稳定时间,优选堵水剂的主剂类型、浓度及添加剂的类型和浓度,优选出强度较大且稳定性强的新型化学堵水剂配方。所研制的最佳选择性堵水配方(质量分数)为:0.7%HPAM+2%Ca-Ls+0.3%有机铬+0.15%NaHCO_3+0.005%硫脲。24h黏度小于2 000mPa·s,成胶时间大于48h,成胶最大黏度大于20 000mPa·s,且30d黏度保留率大于80%。对不同渗透率的岩芯,堵水剂的堵水率大于80%,堵油率小于20%,具有良好的选择性。在朝阳沟油田现场施工3口井,累计增油2 225.3t,累计降水量11 631.2t,具有较好的封堵性。According to geological characteristics of high liquid content and high water content wells in Chaoyang Trench oil field.A new chemical water shutoff agent with strong strength and strong stability was selected through the determination of gelling strength,gelling time,stability time,type and concentration of shutoff agents and additives.The optimum formula of water plugging（mass fraction）is as follows：0.7%HPAM＋2%Ca-Ls＋0.3%organic chromium＋0.15%NaHCO3＋0.005%thiourea.The viscosity in 24 his less than 2 000 mPa·s,the gelling time is more than 48 h,the gelling max viscosity is more than 20 000 mPa·s,and the viscosity reservation in 30 days is more than 80%.According to the cores of different permeability,the water plugging rate of plugging agent is more than 80%,and the plugging oil rate is less than 20%,which has good selectivity.It has been used on 3 wells in Chaoyang Trench oil field in 2016.The increase production of cumulative oil is 2 225.3 t,and the cut of cumulative water is 11 631.2 t,which has good sealing performance.

关 键 词：优选 堵水剂 选择性堵水 提高采收率 

分 类 号：TE65[石油与天然气工程—油气加工工程]