华庆油田长6尾追陶粒压裂试验研究与应用

Research and Application of Chasing Ceramsite Fracturing Test in Huaqing OUfield

华庆油田长6储层埋深为2100m，有效闭合应力为28．1MPa，优化导流毹力为20．0De·cm。采用石英砂不能满足储层导流能力需求，采用低密度陶粒远远超过储层导流能力需求，为此，提出了支撑剂采用石英砂尾追低密度陶粒压裂的技术思路。通过支撑剂性能评价、不同尾追比例时短期导流能力测试和长期导流能力测试、尾追比例为1：2时300h的长期导流能力测试、携砂液平行板模型试验和产能模拟计算，确定了尾追陶粒比例为1：2，完成了22口井的现场试验．单井日增油0.3t左右，取得了较好的应用效果：

The Chang6 reservoir of Huaqing oilfield has a buried depth of 2100 m, 28.1 MPa valid closure stress and 20.0 Dcocm optimizing conductivity. Under this circumstance, adopting the quartz sand cannot meet the demand of the reservoir＇s conductivity, while the low-density ceramsite sand is far beyond the demand of its conductivity. Therefore, the technical approach of using quartz sand to chase the low-density ceramsite sand fracturing has been proposed. Through the capability evaluation of the proppant, short- term and long-term conductivity test with various chasing proportion, 300 hours＇ long-term conductivity test when the chasing pro- portion is 1：2, the experiment of carrier fluid parallel plate model and analog computation of its production capacity, the 1：2 chasing ceramsite proportion has been identified. Then 22 oil-wells field tests have been completed and every well has gained an increase of 0.3t oil per day which represents the tests have achieved excellent application effects.