Experimental Investigations Into the Performance of a Flat-Rheology Water-Based Drilling Fluid
- Lin Xu (Yangtze University) | Ming Biao Xu (Yangtze University) | Lin Zhao (Yangtze University) | Shou Cheng Wen (Yangtze University) | Wei Hong Liu (Yangtze University) | Jie Xu (China University of Geosciences) | Fu Chang You (Jiahua Technology Company Limited) | Cheng Gong (Jiahua Technology Company Limited)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- February 2013
- Document Type
- Journal Paper
- 69 - 77
- 2013. Society of Petroleum Engineers
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- 496 since 2007
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The aqueous drilling fluid (AF) with unique flat rheology (FR), as apotential alternative to nonaqueous fluids (NAFs), is meaningful in deepwateroperations. In this work, a novel FR water-based mud (WBM) was presented. Anevaluation of FR profiles was conducted on the designed system by detecting thetypical rheological data at a certain temperature and pressure range. Theresults showed that for the newly developed WBM, in addition to typical FRparameters [i.e., 6- and 3- rev/min readings and yield points (YPs)], theviscosity term also delivers near-constant variations in the temperature rangeof 39 to 150°F. To attain FR profiles, the rheological modifier appears to benecessary for its temperature-activated behavior. In addition, the FR WBMdisplays lower pressure and temperature dependence. The laboratorycontamination tests indicated that the WBM system possesses excellentinhibition and lubricity properties as well as a strong tolerance to thecontamination of seawater and sand/mudstone cuttings.
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