Corrosion is the natural and continuous degradation of materials caused by either chemical, mechanical, or electrochemical reactions. Corrosion inhibitors may be added to the completion fluids to address corrosion problems efficiently. It is critical to add corrosion inhibitors in completion fluids, specifically under high-temperature conditions, since the corrosion rate is higher when the temperature is high. This corrosion process limits the life of the drill tools or the oil and gas well and causes formation damage. This research studied corrosion and corrosion inhibition treatments for five completion fluids, namely potassium chloride, sodium chloride, sodium bromide, calcium chloride, and calcium bromide. Phosphate and sulfite-based corrosion inhibitors were individually added to the completion fluids, and their corrosion properties were studied to tackle the corrosion issue. In addition, a mixture of phosphate-based and sulfite-based corrosion inhibitors in completion fluids was studied. Additionally, the experimental results recommend using divalent brines as they were identified as a better medium for lowering corrosion rate and conditions than the monovalent brines. A novel aspect of this study is that the materials leveraged for conducting experiments are also used in actual petroleum production field operations. The experiments demonstrate that the corrosion rate can be efficiently controlled at high temperatures in deeper wells.

腐蚀是由化学、机械或电化学反应引起的材料的自然持续降解。可以将腐蚀抑制剂添加到完井液中以有效解决腐蚀问题。在完井液中添加缓蚀剂至关重要，特别是在高温条件下，因为温度高时腐蚀速率更高。这种腐蚀过程限制了钻具或油气井的寿命并导致地层损坏。本研究研究了氯化钾、氯化钠、溴化钠、氯化钙和溴化钙五种完井液的腐蚀和缓蚀处理。将磷酸盐和亚硫酸盐基缓蚀剂分别添加到完井液中，并研究其腐蚀特性以解决腐蚀问题。此外，还研究了完井液中磷酸盐基和亚硫酸盐基腐蚀抑制剂的混合物。此外，实验结果建议使用二价盐水，因为它们被认为是比一价盐水更好的降低腐蚀速率和条件的介质。这项研究的一个新颖之处是用于进行实验的材料也用于实际的石油生产现场操作。实验表明，在更深井的高温下可以有效控制腐蚀速率。