基于酶的清理液是滤饼去除应用的首选，特别是在水平井中，因为与传统清理液相比具有多种优势，包括反应性低、腐蚀性较小、对环境影响更积极，以及最终的均匀过滤效果。蛋糕去除覆盖范围。大多数酶基清洁液仅限于低温。在完整的论文中，作者描述了为评估 250°F 温度下水基泥浆的基于酶/原位生成的有机酸清理液而进行的大量实验室工作。
在描述他们的实验方法之前，作者在整篇论文中提供了文献综述，详细介绍了滤饼损坏的清理或去除、自然清理、酸和氧化剂、酶、酶破坏剂系统以及影响酶破坏剂性能的因素。
用于执行高压/高温 (HP/HT) 压滤机测试的钻入液是实验室和现场样品。现场样品取自 A 井。钻井液配方中使用 XC 聚合物、淀粉和 PAC-L 聚合物来控制滤失量并增加其粘度。
Enzyme-based cleanup fluids are preferred for filter-cake-removal applications, especially in horizontal wells, because of several advantages compared with conventional cleanup fluids, including low reactivity, less corrosivity, more-positive environmental impact, and, ultimately, homogeneous filter-cake-removal coverage. Most enzyme-based cleanup fluids are limited to low temperatures. In the complete paper, the authors describe extensive laboratory work conducted to evaluate an enzyme-based/in-situ generated organic acid cleanup fluid for a water-based mud at a temperature of 250°F.
Before describing their experimental methods, the authors provide a literature review in the complete paper detailing cleanup or removal of filter-cake damage, natural cleanup, acids and oxidizers, enzymes, enzyme-breaker systems, and factors influencing performance of enzyme breakers.
The drill-in fluids used to perform the high-pressure/high-temperature (HP/HT) filter press tests were laboratory and field samples. The field samples were obtained from Well A. XC-polymer, starch, and PAC-L polymers were used in the drilling-fluid formulation to control fluid loss and to increase its viscosity.
