用斜井岩芯的声发射效应确定深层地应力

DETERMINATION OF IN-SITU STRESSES AT GREAT DEPTH BY USING ACOUSTIC EMISSION TECHNIQUE OF INCLINED CORE

声发射效应方法是确定油田地应力的一种有效方法，但以往主要应用于竖井情况。本文首次将声发射效应方法应用于斜井的非定向取芯岩样，并通过应为坐标变换，求解非线性方程组，确定大地坐标中的主地应力。此方法应用于渤海油田并取得了满意效果。

The acoustic emission technique is an effective method to determine in-situstresses, which is mainly applied to vertical wells. A new method is developed todetermine in-situ stresses by using acoustic emission technique of undirected cores ofinclined well. The principal stresses are given by using coordinate system transformationsand solving nonlinear equations. The method is applied successfully in Bobai oil field.