抗高温气制油基钻井液用乳化剂的研制和性能评价

摘要

The primary and secondary emulsifiers used in GTL (gas-to-liquid) based drilling fluid are developed by organic acid NAA, organic amine NAM-1 and NAM-2. From the methods of FTIR, emulsion ratio, electric stability, drilling fluid formulation, the emulsifiers are characterized and evaluated. The evaluation results show that amidation happens with synthesis of primary /secondary emulsifiers. At the temperature of 220 °C, the emulsion ratio of water-in-GTL oil emulsion is 83% and the electric stability is 508 V with the total amount of primary and secondary emulsifier is 2% .When the amount of primary and secondary emulsifier both are 25 kg/cm3, the electric stability is 1,048 V at 220 °C with the GTL based drilling fluid density of 2.3 g/cm3.%利用与气制油具有较好互溶性的有机酸NAA分别与具有多反应节点的链状有机胺NAM-1和NAM-2发生酰胺化反应,制备了气制油基钻井液用抗高温主、辅乳化剂 采用FTIR、乳化率、电稳定性和气制油钻井液配方对主、辅乳化剂进行了表征和性能评价,结果表明:在主、辅乳化剂的合成过程中发生了酰胺化反应,该梳型弧状乳化剂分子量较传统的乳化剂大幅度增大;主、辅乳化剂总加量为2％(配比为1:1)时配制的气制油包水乳液,在220℃的高温条件下乳化率为83％,破乳电压为508V;主、辅乳化剂加量均为25kg/m3时配制的密度为2.3g/cm3的气制油基钻井液,在温度为220℃时破乳电压为1048V.说明制备的乳化剂具有良好的乳化和抗高温性能.