摘要
河南油田污水处理过程中伴生的含油污泥含水35.08% 、油29.06% 、泥质35.86% 、150 目筛余率4.21% ，外观为黑硬膏状。油田含油污泥固相主要是由不同粒径的砂子和黏土组成的泥质颗粒，占97.45% ，粒径小于63μm的颗粒占84.02% ，泥质粒径细小且分布集中。以油田含油污泥为主要原料，加入0.20% 率0.25%JHW-1 悬浮剂、0.3% 率0.4%FSJ-1 分散剂、2.5% 率4.0%NT-1 固化剂，得到油水井深部液流转向剂。实验表明，该液流转向剂浆体稳定、注入性好、强度较高（突破压力梯度大于0.28MPa/cm），封堵率为88.2% 率95.6% ，且成本低廉适合大剂量深部注入。双管并联岩心实验表明，液流转向剂调剖后，低渗、高渗岩心的水驱采收率分别增加25.73% 和17.11% 。在河南油田现场应用56口井，措施井启动压力增加、吸水指数降低、注水压力上升、吸水剖面得到改善，共消耗含油污泥105118m3，累计增油17369 t，降水90000 m3，增油、降水效果明显。
Abstract
Black paste of oily sludge in the process of sewage treatment in Henan oilfield was analyzed, which consisted of 35.08% water, 29.06% oil, 35.86% argillaceous and 4.12% sieve rate of 150 mesh. The solid phase of oily sludge was composed of argillaceous particles such as sand and clay with different particle size, accounting for 97.45%, particle size smaller than 63μm accounted for 84.02%. The argillaceous particle size was fine and distribution was concentrated. The deep fluid diversion agent with the main material of oilfield oily sludge was developed, which included 0.20% —0.25% JHW-1 suspension, 0.3% —0.4% FSJ-1 dispersant, 2.5% —4.0%NT-1 curing agent. The experiment results showed that the slurry had a good stability, poured nature, higher strength （the breakthrough pressure gradient> 0.28MPa/cm）, 88.2%—95.6% core plugging rate, and low cost which was suitable for large scale of deep injection. Double parallel sand pipes experiment results showed that the water flooding recovery of hypotonic and hypertonic core increased by 25.73% and 17.11% respectively after fluid diversion agent profile control. The agent was used in 56 wells in Henan oilfield with oily sludge consumption of 105118 m3, cumulative oil increment of 17369 t and water cut decrease of 90000 m3. The application showed that the starting pressure of measure wells increased, water absorption index lowered, water injection pressure rose, and water injection profile improved. The pilot effects of increasing oil production and decreasing water cut were obvious.
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