延长油田固体颗粒防蜡剂PI-400实验评价

Experimental Evaluation of Solid Particle Paraffin Inhibitor PI-400 in Yanchang Oilfield

为了研究延长油田所用PI-400型固体颗粒防蜡剂实验综合性质,进行204℃井底温度的0.38%超级胍胶+0.36%交联调节剂+其它添加剂工况下模拟实验,通过预设的悬浮性能表征、加砂裂缝导流能力表征和防蜡剂效果测试结果论证药剂优异性。研究得出:95℃下完全静置2h进行高聚光清蜡剂观测发现其成均匀悬浮分布;PI-400型固体颗粒防蜡剂对裂缝导流性能影响情况较小;实验以最佳2mL/min、5mL/min、10mL/min排量下进行5次、12次、24次循环得出,总体下降速率分别为52%,56%,66%,原油的含蜡量是导致凝固变化的直接要因。

In order to study the comprehensive properties of PI-400 solid particle paraffin inhibitor used in Yanchang oilfield, the simulation ex-periment is carried out under the working conditions of 0.38% super guar gum + 0.36% cross-linking regulator + other additives at 204 ℃ bottom hole temperature. The superiority of the agent is demonstrated through the preset suspension performance characterization, sand fracture flow conductivity characterization and paraffin inhibitor effect test results. The results show that the high concentration paraffin remover has uniform suspension distri-bution after completely standing at 95℃ for 2 h;the influence of PI-400 solid particle paraffin inhibitor on the fracture conductivity is small;under the optimal displacement of 2 m L/min, 5 mL/min and 10 mL/min, the 5 times, 12 times and 24 times circulations are carried out, and the overall decline rate is obtained which is 52%, 56% and 66% respectively, and it is concluded that the wax content of crude oil is the direct cause of solidification change.