Properties and Field Application of LFW (Low Free Water) Drilling Fluid

Wellbore instability is known to be a significant problem that has plagued mud engineers for many years. In order to solve this problem, mud engineers have studied on pressure control, increasing inhibition of drilling mud, and plugging the formation, but the relationship between flowing state of fr...

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Bibliographic Details
Published in:Petroleum science and technology 2013-07, Vol.31 (13), p.1371-1378
Main Authors: Zhang, Y., Xiang, X.-J., Yan, J.-N., Wu, B., Shu, F.-C., Wang, J.
Format: Article
Language:English
Subjects:
application
Applied sciences
complexing
Crude oil, natural gas and petroleum products
Density
Drilling
Drilling fluids
Drilling. Casing. Preparing wells for production
Energy
Exact sciences and technology
Finishing
free water
Fuels
Instability
mechanism
Mud
Prospecting and production of crude oil, natural gas, oil shales and tar sands
shale
Stability
Well drilling
wellbore instability
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Summary:Wellbore instability is known to be a significant problem that has plagued mud engineers for many years. In order to solve this problem, mud engineers have studied on pressure control, increasing inhibition of drilling mud, and plugging the formation, but the relationship between flowing state of free water in drilling fluid with wellbore instability has been always ignored. The authors discuss the properties and field application of the low free water (LFW) drilling fluid in more than 10 wells drilled in China. It is a new kind of drilling fluid, which has less free water contrasting with counterparts. In addition, it is also a new concept to solve wellbore instability. Field application shows that LFW drilling fluid can increase bearing capability of the formation, decrease the density of drilling fluids when finishing drilling, and shorten the drilling time.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2010.543728