低成本环保无机调剖技术

Low-cost and Pro-environmental Inorganic Profile Control Technology

孤东油田经过长期注水开发,大孔道窜流严重,需要采取大剂量高强度无机颗粒深部调剖。为降低施工材料成本,结合联合站废弃油泥砂和湿地浮渣环保再利用的需要,在对油泥砂和湿地浮渣无机颗粒性能分析的基础上,对两种无机调剖材料进行改质处理。结果表明,改性油泥砂调剖剂200目过筛率97%,稳定性好,60 min析水率小于10%,堵水率大于95%,实现了材料的可控胶结,且现场强度调整方便,便于段塞组合的优化,优化后的成本下降到1 600元/吨;湿地浮渣优化后粒径中值19.357μm,筛选出的复合堵剂最佳配方(油泥∶固化剂∶激发剂)为10∶2∶1,堵剂成本980元/吨,较好满足了低油价下经济调剖的需要。

Through a long-term water injection development in an oilfield, large pore paths channel seriously and they need take large doses of high-strength inorganic particles for deep profile control. To reduce the construction cost of materials, and meet the needs of environmental protection and recycling of waste oil-mud sand in joint station and wetland scum, two kinds of inorganic profile control materials are treated based on the performance analysis of oil-mud sand and wetland scum inorganic particles. The results show that the modified oil-mud sand profile control agent 200 mesh sieve rate is 97% with good stability, the 60 rain drainage rate is less than 10%, and water plugging rate is more than 95%. The controllable cementing is realized and field intensity adjustment is convenient, facilitating slug combination optimization. The cost after optimized is down to 1600 yuan/ton. The optimized wetland scum size median is 19.357 μm. The best proportion of the selected compound plugging agent （oil mud： cementing agent： exciting agent） is 10：2：1, and the plugging agent cost is 980 yuan/ton. All of these help to better meet the needs of economical profile control under a low oil price.