Currently, polymers were applied as the most functional additives for optimizing the rheological behavior and filtrate volume control of water-based drilling fluids. To affirm this concept, the present work aims to prepare sodium salt of linear polyacrylic acid (NaLPAA), polyacrylamide (NaLPAM) and their cross-linked polymer hydrogels (NaCPAA and NaCPAM), in different ratios using N,N′-methylenebis(acrylamide), as a cross-linker, potassium persulfate and ascorbic acid as initiators. FTIR characteristic spectra, ¹H NMR analysis, SEM micrographs and elemental analysis for the formed gels were employed to emphasize their consistence. TGA and TGA-DTG thermo-grams displayed that NaCPAA polymer hydrogel offered the highest thermal stability behavior. The swelling behavior of the prepared hydrogels was examined and demonstrated that CPAM showed the best behavior at pH = 4 (acidic medium). The rheological properties of the investigated water-based mud samples were studied at various temperatures. For sample containing 0.57% (2 g) of NaCPAA at ambient temperature, it showed the highest rheological behavior in which AV achieved the highest value at 118 cP, PV was recorded at 69 cP, and YP was detected at 99 lbf/100 ft². At LTLP conditions, sample containing 0.57% of XC-polymer and 2.86% bentonite in its composition offered the most enhanced mud cake thickness at 4.2 mm. At HTHP conditions, the filtrate volume of sample containing 0.29% NaLPAA was detected at 35 mL and for sample containing 0.57% was calculated at 22 mL. In addition, the modified mud samples with the same recipe of NaLPAA and NaCPAA at different applied temperatures showed moderate rheological properties compared to the commercial XC-Polymer. Furthermore, NaCPAA manifested a reduction in the swelling properties of water-based mud system containing high amount of API bentonite (2.85%, 10 g) in which AV and PV were calculated at 30 and 17 cP, respectively. In addition, YP was recorded at 22 lbf/100ft². So, it could be used as a thinner for water-based bentonite mud systems.

目前，聚合物被用作功能最强的添加剂，以优化水基钻井液的流变行为和滤液体积控制。为证实这一概念，本工作旨在使用N，N'-亚甲基双（丙烯酰胺）以不同比例制备线性聚丙烯酸酯（NaLPAA），聚丙烯酰胺（NaLPAM）及其交联的聚合物水凝胶（NaCPAA和NaCPAM）的钠盐。 ）作为交联剂，过硫酸钾和抗坏血酸作为引发剂。FTIR特征光谱，¹形成的凝胶的1 H NMR分析，SEM显微照片和元素分析被用来强调它们的一致性。TGA和TGA-DTG热谱图显示NaCPAA聚合物水凝胶具有最高的热稳定性能。检查了制备的水凝胶的溶胀行为，并证明CPAM在pH = 4（酸性介质）下表现出最佳的行为。在不同温度下研究了所研究的水基泥浆样品的流变特性。对于在环境温度下包含0.57％（2 g）NaCPAA的样品，其流变行为最高，其中AV在118 cP时达到最高值，记录的PV在69 cP时，YP在99 lbf / 100 ft ^2时被检测到。在LTLP条件下，其成分中含有0.57％的XC聚合物和2.86％的膨润土的样品在4.2毫米处提供了最大的泥饼厚度。在HTHP条件下，检测到含有0.29％NaLPAA的样品的滤液体积为35 mL，而含有0.57％的样品的滤液体积为22 mL。此外，与市售XC聚合物相比，在不同的应用温度下具有相同配方的NaLPAA和NaCPAA的改性泥浆样品显示出中等的流变性。此外，NaCPAA表现出含有大量API膨润土（2.85％，10 g）的水基泥浆体系的溶胀性能降低，其中AV和PV分别计算为30 cP和17 cP。此外，YP记录为22 lbf / 100ft ²。因此，它可以用作水性膨润土泥浆体系的稀释剂。