Wellbore Strengthening- Nano-Particle Drilling Fluid Experimental Design Using Hydraulic Fracture Apparatus
Date
2012-10-03
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Abstract
This research project introduces novel lost circulation material (LCM) drilling fluid blends for both water based mud (WBM) and invert emulsion (diesel oil) based mud (OBM) that have been used successfully in the laboratory to achieve very impressive wellbore strengthening results in both permeable and impermeable formations. The optimal blends consisting of in-house prepared nanoparticles (NP1 and NP2) and standard LCM-graphite were established by running and analyzing laboratory hydraulic fracture tests on Roubidoux sandstone and concrete cores. Different blends were used to induce and seal fractures in the cores. The blends that increased the core fracture breakdown pressure (fbp) the most with minimal distortion in mud rheological properties were selected as optimal blends.
The optimal WBM blend increased the core fbp by 70.31% while the optimal OBM blend increased the core fbp by 36.39%. Impermeable concrete tests indicate a positive application of the tested blends in shale formation wellbore strengthening.
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Engineering--Petroleum
Citation
Nwaoji, C. O. (2012). Wellbore Strengthening- Nano-Particle Drilling Fluid Experimental Design Using Hydraulic Fracture Apparatus (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28685