HJ油田侏罗系油藏聚合物微球调驱技术矿场实践

Field Practice of Polymer Microspheres Deep Profile Control Technique in Jurassic Reservoirs in HJ Oilfield

王西强 郝 栋 刘智玮 罗天相 舒成龙 王 亮

WANG Xiqiang，HAO Dong，LIU Zhiwei，LUO Tianxiang，SHU Chenglong，WANG Liang

HJ油田侏罗系油藏经过几年的开采，部分区块已进入中高含水期，为了保证油田稳产、提高油藏采收率，通过室内填砂管实验研究了聚合物微球类型、浓度及注入量对封堵效果的影响，在 HJ油田侏罗系油藏开展了聚合物微球深部调驱试验。研究结果表明，注入 0.3 PV的浓度 5000 mg/L的 WQ100型聚丙酰胺类纳米级聚合物微球（初始粒径约 0.1 μm，膨胀倍数 5～ 20倍）可使物性与 HJ油田侏罗系油藏相似的填砂管的渗透率降低 85%以上。HJ油田侏罗系油藏延 7层 L242区和延 9层 L141区的聚合物微球调驱矿场试验结果表明：WQ100型聚合物微球对储层渗透率处于 6×10-3～ 9×10-3 μm2的井组的调驱效果较好，渗透率高于该范围井组封堵作用不明显，物性较差、水井油压接近系统压力井组不适宜于开展微球调驱。图 5表5参 10

After several years of exploitation of Jurassic reservoirs in HJ oilfield，the development stage of some well areas came to middle and high water content stages. In order to ensure the stable production and enhance the oil recovery，the effect of polymer microspheres type and concentration and injection on the plugging rate was probed by the laboratory sand pack experiment，and the polymer microspheres deep flooding test was carried out in Jurassic reservoirs of HJ oilfield. The experimental results indicated that the permeability of sand pack with the similar core property to Jurassic reservoirs in HJ oilfield decreased by more than 85% when injected with 0.5 PV polyacrylamide nanoscale polymer microspheres solution with 5000 mg/L WQ100，whose initial particle size was 0.1 μm and swelling times was 5—20. The polymer microspheres deep profile field practice results in Yan 7 L242 well area and Yan 9 L141 well area showed that the WQ100 polyacrylamide polymer microspheres had good effect in the well groups whose reservoirs permeability was in 6×10-3—9×10-3 μm2. When the reservoir permeability was above 9×10-3 μm2，the effective plugging was not happened. In addition，polymer microspheres deep flooding didn't adapt to well groups which had poor physical property and high pressure water well.