钻井液对不同注浆材料流变触变行为的影响研究

doi:10.11799/ce202603011

摘要/Abstract

摘要：

针对煤矿奥灰含水层治理过程中因注浆材料选择导致封堵效果不佳的问题，通过流变/ 触变仪、粒度分布仪、Zeta电位仪、有机碳吸附仪与等温量热仪等测试手段，从物理和化学两个角度研究了钻井液对水泥浆与黏土浆流变/触变行为的影响规律，分析了钻井液与注浆材料的相互作用机制，并通过新安煤田孟津煤矿奥灰含水层治理工程验证了不同注浆材料对钻井液的吸附封堵效果。结果发现：①钻井液显著增加水泥浆与黏土浆的流变性能（动态屈服应力、塑性黏度）及触变性，且呈现掺量依赖性。相同掺量下，黏土浆动态屈服应力比水泥浆高35%以上，触变性比水泥浆高2.5倍以上；②通过Zeta电位与吸附量分析，带正Zeta电位的水泥浆（+1.39mV）对带负Zeta电位的钻井液（-35.8mV）通过静电吸引实现高效吸附，而带负Zeta电位的黏土浆（-13.4mV）对钻井液产生静电斥力，水泥浆对钻井液的饱和吸附量（330mg/L）和吸附效率（100%）分别是黏土浆对钻井液的2.4倍和1.25倍，表明了电性匹配对吸附行为的决定性作用；③基于电性匹配特性提出水泥浆早期吸附封堵技术，实际工程监测表明，早期水泥浆吸附钻井液后孔口起压速率（0.045MPa/h）仅为黏土浆封堵体系（0. 86MPa/h）的5%，在大漏失地层（漏失速率>30m³/h）应用中堵漏响应效率提升20倍。本研究从物理与化学角度揭示了注浆材料与钻井液电性匹配、选择性吸附与流变/触变增加的相互作用机制，为煤矿奥灰含水层早期高效封堵材料设计与工程应用提供了理论依据。

关键词: 注浆材料, 钻井液, 流变触变性, Zeta电位, 吸附特性

Abstract:

Aiming at the problem of poor sealing performance in the treatment process of Ordovician aquifer due to improper selection of grouting materials, The differential influence of drilling fluid on the rheological/thixotropic behavior of cement slurry and clay slurry was analyzed from both physical and chemical perspectives through testing methods such as rheology/thixotropy analyzer, particle size distribution analyzer, Zeta potential analyzer, organic carbon adsorption analyzer, and isothermal calorimeter. The sealing effect of drilling fluid on different grouting materials was verified through the application engineering of Mengjin Coal Mine in Xin'an Coalfield. Results show that: (1) Drilling fluid significantly increases the rheological properties (dynamic yield stress, plastic viscosity) and thixotropy of cement slurry and clay slurry, and exhibits a dose-dependent effect. At the same dosage, the rheological parameters of clay slurry are more than 35% higher than those of cement slurry, and the thixotropy is more than 2.5 times higher than that of cement slurry. (2) By analyzing zeta potential and adsorption capacity, cement slurry with positive zeta potential (+1.39 mV) and drilling fluid with negative zeta potential (-35.8 mV) achieved efficient adsorption through electrostatic attraction. The saturated adsorption capacity (330 ppm) and adsorption efficiency (100%) of cement slurry on drilling fluid are 2.4 times and 1.25 times that of clay slurry (-13.4 mV) on drilling fluid, respectively. the decisive role of electrical matching in adsorption behavior was elucidated. (3) Based on electrical matching mechanism, the technology for early adsorption blocking of cement slurry is proposed. The application project in Mengjin coal mine (leakage rate >30 m3/h) of Xin'an coal field shows that the rise rate of hole pressure (0.045 MPa/h) after cement slurry adsorption of drilling fluid is only 5% of that of clay slurry system (0.86 MPa/h), and the plugging response efficiency is improved by 20 times. This study reveals the interaction mechanism between the grouting material and drilling fluid from a multi-scale perspective, and provides a theoretical basis for the design and engineering application of highly efficient plugging materials for the coal mine Ordovician aquifer.

中图分类号:

TD745

崔　勇, 尹希文, 于秋鸽, 樊振丽, 孙晓冬.

钻井液对不同注浆材料流变触变行为的影响研究 [J]. 煤炭工程, 2026, 58(3): 85-93.

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