Research of Na 2 CO 3 /C 12 H 25 SO 4 Na modified bentonite on high dispersion performance

Materia

article

Yunjie Shu¹  Mingzhe Guo¹  Chengcheng Ji¹  Mei Dong¹  Dinar Nigmatullin¹ 

[1] Liaoning Petrochemical University

关键词: Bentonite;    Anionic surfactants;    Dispersion;    Drilling fluid;    Modification;   

DOI  :  10.1590/1517-7076-RMAT-2022-0051

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The dispersion performance of drilling fluids at high temperatures has always been a bottleneck in the research. To improve the dispersion of drilling fluid at high temperature and pressure, the natural Ca-based bentonite was modified with Na2CO3 and SDBS (sodium dodecyl benzene sulfonate: C12H25SO4Na) by microwave semi-dry method. The effects of the ratio of Na2CO3 to SDBS, radiation time, initial temperature and microwave power on the modification were investigated. In addition, the microstructure of the samples was obtained using infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the results showed that Na2CO3/SDBS was successfully inserted into the bentonite. In addition, the dispersion performance of the modified bentonite was evaluated in this paper, and the gelling value of the modified bentonite was 525 ml/15 g with an apparent viscosity of 22.5 mPa·s. The modified bentonite was compared with drilling-grade Na-based bentonite. The fluid loss (FLHTHP) of modified bentonite at high temperature and pressure is only 8 mL, the mud productivity is up to 25.71 m3/t, and the kinetic plastic ratio of modified bentonite is 1.5. The modified bentonite has better dispersion performance at high temperature and pressure.

【 授权许可】

CC BY