科研之友
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摘要
The accurate stress distribution around the Karstic cave is the key to control lost circulation of drilling fluid and protect oil reservoir Based on complex function conformal transformation method and elasticity theory, the analytic expression of stress distribution around elliptic Karstic cavern is deduced under the joint actions of internal uniform water pressure and unequal confining pressure, and then main controlling factors affecting the stress distribution such as ratios of the long axis and short axis, different lateral pressure coefficient and different water pressure are analyzed. The results have the great reference for earth stress distribution calculation in well-developed cavern oilfield.
