Enhancement of Plastering Effect on Strengthening Wellbore by Optimizing Particle Size Distribution of Wellbore Strengthening MaterialsSource: Journal of Energy Resources Technology:;2019:;volume 141:;issue 012::page 122905Author:He, Wenhao
,
Hayatdavoudi, Asadollah
,
Chen, Keyong
,
Sawant, Kaustubh
,
Zhang, Qin
,
Zhang, Chi
DOI: 10.1115/1.4043785Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Wellbore strengthening materials (WSMs) have been widely used to strengthen the wellbore stability and integrity, especially those lost circulation materials (LCMs) used for mud loss impairment. To enhance the wellbore strengthening effect rather than a loss impairment, plastering effect can be used to increase the fracture gradient of the wall and minimize the probability of inducing new fractures. This is done by smearing the mudcake and pores and forming an internal cake inside the rock matrix using WSMs (or LCMs). Until now, the particle size distribution (PSD) of LCMs have been widely studied for the minimization on the mud loss (e.g., Abran’s rule, ideal packing theory, D90 rule, Halliburton D50 rule, etc.). However, there are few empirical rules focused on the maximum wellbore strengthening effect. This study attempts to find the desired PSD of plastering materials to enhance wellbore stability. In this research, the Brazilian test was used to quantify tensile strength. Meanwhile, the filtration characteristics of WSMs through the rock matrix were observed using a scanning electron microscope (SEM) and an energy-dispersive system (EDS). Finally, this paper adopts D50 of WSMs to be the mean pore throat size for a maximum improvement on the rock tensile strength. We have observed that the closer the D50 of WSMs in the WSMs to the mean pore throat size, the stronger the saturated rock matrix.
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contributor author | He, Wenhao | |
contributor author | Hayatdavoudi, Asadollah | |
contributor author | Chen, Keyong | |
contributor author | Sawant, Kaustubh | |
contributor author | Zhang, Qin | |
contributor author | Zhang, Chi | |
date accessioned | 2019-09-18T09:02:43Z | |
date available | 2019-09-18T09:02:43Z | |
date copyright | 6/20/2019 12:00:00 AM | |
date issued | 2019 | |
identifier issn | 0195-0738 | |
identifier other | jert_141_12_122905 | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4258211 | |
description abstract | Wellbore strengthening materials (WSMs) have been widely used to strengthen the wellbore stability and integrity, especially those lost circulation materials (LCMs) used for mud loss impairment. To enhance the wellbore strengthening effect rather than a loss impairment, plastering effect can be used to increase the fracture gradient of the wall and minimize the probability of inducing new fractures. This is done by smearing the mudcake and pores and forming an internal cake inside the rock matrix using WSMs (or LCMs). Until now, the particle size distribution (PSD) of LCMs have been widely studied for the minimization on the mud loss (e.g., Abran’s rule, ideal packing theory, D90 rule, Halliburton D50 rule, etc.). However, there are few empirical rules focused on the maximum wellbore strengthening effect. This study attempts to find the desired PSD of plastering materials to enhance wellbore stability. In this research, the Brazilian test was used to quantify tensile strength. Meanwhile, the filtration characteristics of WSMs through the rock matrix were observed using a scanning electron microscope (SEM) and an energy-dispersive system (EDS). Finally, this paper adopts D50 of WSMs to be the mean pore throat size for a maximum improvement on the rock tensile strength. We have observed that the closer the D50 of WSMs in the WSMs to the mean pore throat size, the stronger the saturated rock matrix. | |
publisher | American Society of Mechanical Engineers (ASME) | |
title | Enhancement of Plastering Effect on Strengthening Wellbore by Optimizing Particle Size Distribution of Wellbore Strengthening Materials | |
type | Journal Paper | |
journal volume | 141 | |
journal issue | 12 | |
journal title | Journal of Energy Resources Technology | |
identifier doi | 10.1115/1.4043785 | |
journal fristpage | 122905 | |
journal lastpage | 122905-10 | |
tree | Journal of Energy Resources Technology:;2019:;volume 141:;issue 012 | |
contenttype | Fulltext |