LP-Ⅰ清防蜡剂的研制及应用

摘要

In order to solve the serious problem of paraffin deposit at Yuan 300 and Yuan 301 area in Chan-gqing Oilfield,based on melting point,composition,gas chromatography and infrared analysis,paraffin remover and paraffin inhibitor were screened and optimized,and LP-Ⅰparaffin remover/inhibitor was developed.Results showed that,paraffin removal rate of paraffin remover which complexed with petroleum ether,xylene,cyclohex-ane,kerosene and additives for paraffin remover/inhibitor was 96.23%;paraffin inhibition rate of paraffin inhib-itor which complexed with naphthalene,sodium petroleum sulfonate and high-pressure polyethylene was 32.47%;paraffin removal rate and paraffin inhibition rate of paraffin remover/inhibitor complexed with paraffin remover and paraffin inhibitor of 2∶1 were 85.23%,27.59%,respectively.The field test results showed that, adding LP-Ⅰ paraffin remover/inhibitor into Yuan 301-56 and Yuan 301-39,their maxium load reduced,minium load increased,area of loading curve reduced obviously,wax didn′t appear.Above results indicated that LP-Ⅰparaffin remover/inhibitor had good application efficiency.%为解决长庆油田元300和元301区油井严重结蜡的问题，在对该地区蜡样的熔点、组分、气相色谱和红外光谱进行分析的基础上，优化筛选了清蜡剂和防蜡剂，研制了适合长庆油田区块的 LP-Ⅰ清防蜡剂。结果表明：以石油醚、二甲苯、环己烷、煤油与一定量清防蜡剂助剂复配得到的清蜡剂的清蜡率为96.23％；以萘、石油磺酸钠与高压聚乙烯复配得到的防蜡剂的防蜡率为32.47％；以清蜡剂∶防蜡剂＝2∶1的比例复配得到 LP-Ⅰ清防蜡剂的清蜡率为85.23％、防蜡率为27.59％。现场试验结果表明，添加 LP-Ⅰ清防蜡剂的元301-56井和元301-59井示功图的最高载荷下降，最低载荷略有上升，载荷曲线面积明显变小，未出现明显结蜡现象，表明 LP-Ⅰ清防蜡剂现场应用效果良好。