Cong Haonan, Ma Zihao, Hu Meixi, Han Junjie, Wang Xing, Han Ying, Li Yao, Sun Guangwei
Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
Department of Research and Development, Dalian Chivy Biotechnology CO., LTD., Dalian 116034, China.
ACS Omega. 2022 Apr 1;7(14):11722-11730. doi: 10.1021/acsomega.1c06817. eCollection 2022 Apr 12.
Herein, we developed an efficient and convenient method to address the problem of thickener decomposition in the low- permeability oilfield production process. It is crucial to design breakers that reduce viscosity by delaying thickener decomposition in appropriate environments. By using lignin in biomass as a substrate for β-mannanase immobilization (MIL), we fabricated a gel breaker, surface gelatin-coated β-mannanase-immobilized lignin (Ge@MIL). Through experiments and performance tests, we confirmed that the prepared Ge@MIL can release enzymes at a specific temperature, meanwhile having temperature-sensitive phase change properties and biodegradability. The results also show the tight tuning over the surface coating of Ge@MIL by a water-in-oil emulsion. Therefore, the prepared Ge@MIL has a promising application in the field of oil extraction as a green and efficient temperature-sensitive sustained-release capsule.
在此，我们开发了一种高效便捷的方法来解决低渗透油田生产过程中增稠剂分解的问题。设计能够在适当环境中通过延迟增稠剂分解来降低粘度的破胶剂至关重要。通过使用生物质中的木质素作为固定化β-甘露聚糖酶（MIL）的底物，我们制备了一种凝胶破胶剂，即表面明胶包覆的固定化β-甘露聚糖酶木质素（Ge@MIL）。通过实验和性能测试，我们证实所制备的Ge@MIL能够在特定温度下释放酶，同时具有温度敏感的相变特性和生物降解性。结果还表明，通过油包水乳液可以对Ge@MIL的表面涂层进行精确调控。因此，所制备的Ge@MIL作为一种绿色高效的温度敏感型缓释胶囊在采油领域具有广阔的应用前景。
