Application of light-weight drilling fluids is essential to develop depleted hydrocarbon reservoirs. Recently, colloidal gas aphron (CGA)-based fluids have been introduced for such applications due to their ability in controlling fluid losses. In this work, a comprehensive experimental study was performed to choose the best formulation for CGA fluids by implementing static stability tests, rheological behavior measurements, and bubble size analyses of CGAs. Xanthan gum polymer and sodium dodecyl benzene sulfonate (SDBS), an anionic surfactant, and cetyl trimethyl ammonium bromide (CTAB), a cationic surfactant, were utilized to prepare CGAs. For the range of experiments conducted, the performance of CGA fluids prepared with SDBS was improved by increasing the polymer and surfactant concentrations. However, for CTAB, it was improved by an increase in the polymer concentration and a decrease in the surfactant concentration. The formation of white, long hair-like precipitates observed at high levels of CTAB caused CGA fluid to become rapidly unstable. Also, it was observed that the size of CGAs was significantly influenced by the polymer and surfactant concentrations. The most stable bubbles were formed at 6.86 g/L of polymer concentration. The results of this study provide insights into appropriate formulation for CGA-based fluids which could be potentially applicable in drilling operations.

中文翻译：

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深入了解选择适合胶体汽油（CGA）的钻井液配方

轻型钻井液的应用对于开发贫油油气藏至关重要。近来，由于胶体气素（CGA）具有控制流体损失的能力，因此已将其用于此类应用。在这项工作中，通过执行静态稳定性测试，流变行为测量和CGA的气泡尺寸分析，进行了全面的实验研究，以选择CGA流体的最佳配方。使用黄原胶聚合物和十二烷基苯磺酸钠（SDBS）（一种阴离子表面活性剂）和十六烷基三甲基溴化铵（CTAB）（一种阳离子表面活性剂）来制备CGA。对于所进行的实验范围，通过增加聚合物和表面活性剂的浓度可以改善用SDBS制备的CGA流体的性能。但是，对于CTAB，它通过增加聚合物浓度和降低表面活性剂浓度而得到改善。在高CTAB水平下观察到白色长发状沉淀物的形成，导致CGA液迅速变得不稳定。而且，观察到CGA的尺寸显着地受到聚合物和表面活性剂浓度的影响。在聚合物浓度为6.86 g / L时形成最稳定的气泡。这项研究的结果为基于CGA的流体的适当配方提供了见识，该配方可能适用于钻井作业。据观察，CGA的大小受聚合物和表面活性剂浓度的影响很大。在聚合物浓度为6.86 g / L时形成最稳定的气泡。这项研究的结果为基于CGA的流体的适当配方提供了见解，这些配方可能适用于钻井作业。据观察，CGA的大小受聚合物和表面活性剂浓度的影响很大。在聚合物浓度为6.86 g / L时形成最稳定的气泡。这项研究的结果为基于CGA的流体的适当配方提供了见识，该配方可能适用于钻井作业。