主客体包合超分子凝胶颗粒调剖剂的制备及性能评价

Preparation and Property Evaluation of Host-guest Inclusion Supramolecular Gel Particles Profile Pontrol Agent

郝继婷 范海明 康万利 李 哲 杨红斌 BAUYRZHAN Sarsenbekuly

HAOJiting FAN Haiming KANG Wanli LI Zhe YANG Hongbin BAUYRZHAN Sarsenbekuly

预交联凝胶颗粒（PPG）被广泛用于治理油藏水流优势窜流通道，起到稳油控水的效果。为了解决常规共 价结构的PPG强度不足、剪切恢复性能差以及不耐盐的问题，以烯丙基-β-环糊精（烯丙基-β-CD、主体功能单体）、十六烷基二甲基烯丙基氯化铵（C16DMAAC、客体功能单体）、N，N’-亚甲基双丙烯酰胺（MBA、交联剂）和 丙烯酰胺（AM）为主要原料，研制了一种具有剪切恢复性能的共价-非共价协同交联结构的主客体包合超分子凝 胶颗粒（S-PPG）调剖剂。采用流变仪、激光粒度分析仪、光学显微镜系统探究了S-PPG的流变性能、膨胀性能和 耐盐性能。结果表明，主客体单体的最佳加量为总单体物质的量的2.5%与2.5%的S-PPG在地层水中膨胀24h 后，质量分数为0.6%时的弹性模量为73Pa，是常规PPG的3.04倍；屈服应力为120Pa，剪切黏度损失率为39%， 剪切恢复性能和屈服应力均为常规PPG的4倍左右；地层水中的膨胀倍数达23。此外，随着盐含量的增加， S-PPG的膨胀性能逐渐增强，在NaCl质量浓度为1×105mg/L下的膨胀倍数达27.9，表现出优异的耐盐性能。本 文研究为油藏深部调剖提供一种具有潜力的抗剪切S-PPG材料。

Preformed particle gels（PPG）are widely used to control the dominant channeling channel of reservoir to stabilize oil production and control water production. In order to solve the problems of inadequate strength，poor shear recovery performance and salt intolerance of conventional PPG with covalent structure，a host-guest inclusion supramolecular particle gels（S-PPG） profile control agent containing covalent and non-covalent crosslinked structure was developed，which had shear recovery performance. S-PPG was prepared using allyl-β-cyclodextrin （allyl-β-CD，host functional monomer），cetyldimethylallyl ammonium chloride（C16DMAAC，guest functional monomer）and N，N-methylene diacrylamide（MBA，crosslinking agent）and acrylamide（AM）as main raw materials. The rheological properties，swelling properties and salt tolerance of S-PPG was systematically investigated by measurements of rheometer，laser particle size analyzer and optical microscope. The results showed that the elastic modulus of S-PPG（2.5+2.5）system with mass fraction of 0.6% prepared with the formation water was 73 Pa after swelling for 24 h，which was 3.04 times of conventional PPG. The yield stress was 120 Pa，the shear viscosity loss rate was only 39%，the shear resistance and yield stress were about 4 times of the conventional PPG，and the swelling ratio in formation water was 23. In addition，the swelling property of S-PPG was gradually increased with the increase of salt content，and the swelling ratio could reach 27.9 at 1×105 mg/L NaCl concentration，showing excellent salt tolerance. It provides a potential new shear resistant S-PPG material for reservoir in-depth conformance control.

10.19346/j.cnki.1000-4092.2023.04.013