US 12,110,449 B1
Bio-enzyme degradable temporary plugging material and preparation method and application thereof
Jintang Wang, Qingdao (CN); Bo Liao, Qingdao (CN); Xiaohui Sun, Qingdao (CN); Jiaqi Xu, Qingdao (CN); Yingrui Bai, Qingdao (CN); Jian Li, Qingdao (CN); Xianbin Huang, Qingdao (CN); Jiafeng Jin, Qingdao (CN); Meichun Li, Qingdao (CN); Shenglong Shi, Qingdao (CN); Kaihe Lv, Qingdao (CN); Jingping Liu, Qingdao (CN); and Jinsheng Sun, Qingdao (CN)
Assigned to CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Qingdao (CN)
Filed by CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Qingdao (CN)
Filed on Dec. 21, 2023, as Appl. No. 18/391,726.
Claims priority of application No. 202311168559.0 (CN), filed on Sep. 12, 2023.
Int. Cl. C09K 8/42 (2006.01)
CPC C09K 8/426 (2013.01) 5 Claims
OG exemplary drawing
 
1. A process of applying a bio-enzyme degradable temporary plugging material in a well when drilling natural gas in sea areas comprising the following steps:
(1) preparing a modified ceramsite by:
mixing ceramsite with an aqueous solution of 3-aminopropyl trimethoxysilane, stirring, and drying to obtain the modified ceramsite;
(2) preparing a bio-enzyme degradable temporary plugging material by:
fully dispersing the modified ceramsite, ethyl cellulose, and an epoxy resin in dichloromethane to obtain an oil phase; adding the oil phase into a gelatin aqueous solution and mixing uniformly; stirring, evaporating the dichoromethane, filtering, washing, drying, and obtaining the bio-enzyme degradable temporary plugging material, wherein
a mass ratio of the modified ceramsite, the ethyl cellulose, and the epoxy resin is (1-4):1:1;
(3) plugging a reservoir during drilling of the reservoir by applying the bio-enzyme degradable temporary plugging material into the reservoir to maintain stability of well walls; and
(4) contacting the bio-enzyme degradable temporary plugging material in the reservoir with a bio-enzyme when the drilling is completed to degrade the bio-enzyme degradable temporary plugging material.