Synthesis of filtrate reducer from biogas residue and its application in drilling fluid, TAPPI Journal March 2020

Application: Filtrate reducer from biogas residue (FBR) showed promising prospects to be used as an environ-mentally-friendly natural polymeric filtrate reducer of drilling fluid.

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Author: W. Long, H. Luo, Z. Yan, C. Zhang, W. Hao, Z. Wei, X. Zhu, F. Zhou, & R. Cha
Synthesis of filtrate reducer from biogas residue and its ap
ABSTRACT: Biogas residues (BR) containing cellulose and lignin are produced with the rapid development of biogas engineering. BR can be used to prepare the filtrate reducer of water-based drilling fluid in oilfields by chemical modification. BR from anaerobically fermenting grain stillage was alkalized and etherified by caustic soda and chloroacetic acid to prepare filtrate reducer, which was named as FBR. The long-chain crystalline polysaccharides were selected as dispersing agents (DA), and the water-soluble silicate was used as the cross-linking agent. After the hot rolling of FBR in saturated saltwater base mud for 16 h at 120°C, the filtration loss was increased from 7.20 mL/30 min before aging to 8.80 mL/30 min after aging. Compared with the commercial filtrate reducers, FBR had better tolerance to high temperature and salt, and lower cost.

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