@Article{fdmp.2023.029304,
AUTHOR = {Ping Lv, Jiufei Liu, Mengran Xu, Hui Tian, Huajie Liu, Yuhuan Bu, Zhuang Cai, Junfeng Qu},
TITLE = {Development of a High-Temperature Thixotropic Cement Slurry System},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {19},
YEAR = {2023},
NUMBER = {11},
PAGES = {2907--2921},
URL = {http://www.techscience.com/fdmp/v19n11/54209},
ISSN = {1555-2578},
ABSTRACT = {Cementing carbonate reservoirs is generally a difficult task. The so-called thixotropic cement slurry has gained
considerable attention in this regard as it can help to fix some notable problems. More precisely, it can easily fill
the leakage layer; moreover, its gelling strength can grow rapidly when pumping stops, thereby increasing the
resistance to gas channeling, effectively preventing this undesired phenomenon in many cases. High-temperature
thixotropic cement slurry systems, however, are still in an early stage of development and additional research is
needed to make them a viable option. In the present study, using a self-developed composite high-temperature
thixotropic additive as a basis, it is shown that the compressive strength can be adjusted by tuning the proportion
of silica sand, the high-temperature retarder, fluid loss additive and dispersant (compatible with the thixotropic
additive). According to the tests, the developed high-temperature thixotropic cement slurry system has a 14 d
compressive strength of 29.73 MPa at 150°C, and a thickening time of 330 min when the dosage of retarder is
2%. At the same time, the rheological property, water loss, permeability, water separation rate, and settlement
stability of the cement slurry system meet the requirements of cementing construction.},
DOI = {10.32604/fdmp.2023.029304}
}