双尾疏水单体与非离子型可聚合表面活性剂协同作用的耐高温、耐盐、耐剪切压裂液聚合物稠化剂。

Fracturing Fluid Polymer Thickener with Superior Temperature, Salt and Shear Resistance Properties from the Synergistic Effect of Double-Tail Hydrophobic Monomer and Nonionic Polymerizable Surfactant.

机构信息

Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China.

CNPC Engineering Technology R&D Company Limited, Beijing 102206, China.

出版信息

Molecules. 2023 Jun 29;28(13):5104. doi: 10.3390/molecules28135104.

DOI:10.3390/molecules28135104

PMID:37446764

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10343922/

Abstract

To develop high-salinity, high-temperature reservoirs, two hydrophobically associating polymers as fracturing fluid thickener were respectively synthesized through aqueous solution polymerization with acrylamide (AM), acrylic acid (AA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), nonionic polymerizable surfactant (NPS) and double-tail hydrophobic monomer (DHM). The thickener ASDM (AM/AA/AMPS/NPS/DHM) and thickener ASD (AM/AA/AMPS/DHM) were compared in terms of properties of water dissolution, thickening ability, rheological behavior and sand-carrying. The results showed that ASDM could be quickly diluted in water within 6 min, 66.7% less than that of ASD. ASDM exhibited salt-thickening performance, and the apparent viscosity of 0.5 wt% ASDM reached 175.9 mPa·s in 100,000 mg/L brine, 100.6% higher than that of ASD. The viscosity of 0.5 wt% ASDM was 85.9 mPa·s after shearing for 120 min at 120 °C and at 170 s, 46.6% higher than that of ASD. ASDM exhibited better performance in thickening ability, viscoelasticity, shear recovery, thixotropy and sand-carrying than ASD. The synergistic effect of hydrophobic association and linear entanglement greatly enhancing the performance of ASDM and the compactness of the spatial network structure of the ASDM was enhanced. In general, ASDM exhibited great potential for application in extreme environmental conditions with high salt and high temperatures.

摘要

为了开发高矿化度、高温油藏，分别通过水溶液聚合用丙烯酰胺（AM）、丙烯酸（AA）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）、非离子聚合性表面活性剂（NPS）和双尾疏水单体（DHM）合成了两种作为压裂液增稠剂的疏水缔合聚合物。从水溶胀性、增稠能力、流变性和携砂性能方面对增稠剂 ASDM（AM/AA/AMPS/NPS/DHM）和增稠剂 ASD（AM/AA/AMPS/DHM）进行了对比。结果表明，ASDM 能在 6 min 内快速溶于水，比 ASD 少 66.7%。ASDM 表现出盐增稠性能，在 100000 mg/L 盐水中，0.5wt%ASDM 的表观黏度达到 175.9 mPa·s，比 ASD 高 100.6%。在 120°C 和 170 s 下剪切 120 min 后，0.5wt%ASDM 的黏度为 85.9 mPa·s，比 ASD 高 46.6%。ASDM 在增稠能力、粘弹性、剪切恢复性、触变性和携砂性方面的性能优于 ASD。疏水缔合和线性缠结的协同作用大大提高了 ASDM 的性能，增强了 ASDM 空间网络结构的致密性。总的来说，ASDM 在高盐度、高温的极端环境条件下具有很大的应用潜力。