无固相微泡沫压井液研究及性能评价

Preparation and Performance Evaluation of Solid-free Micro Foam Control Fluid

通过对发泡剂、稳泡剂和辅助稳泡剂的优选,确定了无固相微泡沫压井液最佳配方:清水+(0.7%～1.0%)稳泡剂HCC-1+(0.3%～0.5%)发泡剂AS-1/OP-10+(0.8%～2.0%)辅助稳泡剂WDJ+(1.0%～2.0%)增粘型降滤失剂+2.0%其他处理剂,该压井液的密度在0.7～1.0g/cm3之间可调。室内研究表明,该压井液具有良好的流变性和抑制性、较强的耐温抗盐能力,及较好的稳定性、油气层保护性、防膨防爆和防漏堵漏性能。

By optimising foaming agent, foam stabilizer and subsidiary foam stabilizer, the optimal formula of a solid-free micro foam control fluid was determined as follows： fresh water ＋ （0. 7%-1.0% ） foam stabilizer HCC-1 ＋ （0.3%-0.5%） foaming agent AS-1/OP-10 ＋ （0.8%-2.0%） subsidiary foam stabilizer WDJ ＋ （1.0%-2.0%） tackifying fluid loss control agent ＋ 2. 0% other treatment agents. The density of the control fluid was adjustable between 0.7 g/cm^3 to 1.0 g/cm^3. The result of laboratory experiment showed that the control fluid possessed good rheological property and inhibition, strong temperature resistance and salt tolerance, and good stability, oil-gas reservoir protection,expansion and explosion protection,and leak resistant and plugging performance.