In the process of deep oil and gas drilling, high temperature and high amounts of salt will greatly deteriorate the rheological properties of water-based drilling fluids (WBDFs), increase the fluid loss of drilling fluids, and seriously threaten the safety of operations. It is urgent to develop new high-temperature and salt-resistant drilling fluid additives. In this study, a novel organic-inorganic polymer nanocomposite (P-RD') was synthesized by combining laponite and polymer, and its chemical structure and properties were characterized and evaluated by various experimental methods. The results show that P-RD' forms a spatial network structure in aqueous solution, and has good clay adsorption capacity and pore and crack sealing ability. At 180 °C and 15 wt% NaCl, it has good rheological stability to WBDFs, the American Petroleum Institute (API) filtration loss is only 7.1 mL, and the high temperature and high pressure (HTHP) filtration loss is controlled at 29.2 mL. P-RD' has dual functions, which can effectively strengthen the temperature and salt resistance of WBDFs, and is expected to be used as a rheology modifier and filtration loss reducer in high-temperature deep well drilling.

在深部油气钻井过程中，高温高盐会极大地恶化水基钻井液（WBDFs）的流变性能，增加钻井液失水量，严重威胁作业安全。开发新型耐高温耐盐钻井液添加剂刻不容缓。本研究通过合成锂皂石和聚合物合成了一种新型有机-无机聚合物纳米复合材料（P-RD'），并通过多种实验方法对其化学结构和性能进行了表征和评价。结果表明，P-RD'在水溶液中形成空间网络结构，具有良好的黏土吸附能力和孔隙和裂缝封闭能力。在 180 °C 和 15 wt% NaCl 下，它对 WBDFs 具有良好的流变稳定性，美国石油学会（API）滤失量仅为7.1 mL，高温高压（HTHP）滤失量控制在29.2 mL。P-RD'具有双重功能，可有效增强WBDF的耐温耐盐性，有望在高温深井钻井中用作流变改性剂和降滤失剂。