成像测井资料在地应力计算中的应用

准确计算地应力的大小和方向不仅与井壁稳定等钻井工程问题有密切关系，而且对于油气田开发也有着重大意义。目前，成像测井资料在地应力计算中的应用研究不够深入，文中给出了地应力大小的成像测井计算方法，并对成像测井确定地应力方向的方法作了概述。利用该法对川东地区紫水坝构造紫2井的地应力进行了测井解释，结果表明，该法能够较准确地确定出地应力的大小和方向，能够满足于现场实际生产的需要。

THE APPLICATION OF THE FORMATION STRESS CALCULATION USING IMAGE WELL LOGGING DATA

Formation stress magnitude and orientation calculated accurately have not only close relation to drilling project problem, such as the borehole stability, but also have important significance for developing gas-oil field. Presently, the application study that calculate the formation stress by using image well logging data does not make a thorough investigation and study, the paper presents the method calculated formation stress using image well logging data, and summarizes the method of the formation stress orientation determined by using image well logging data. The method is applied to interpret the formation stress of Zi2' swell on east of Sichuan using the image well logging data, and the result show that the method can accurately determinate formation stress magnitude and orientation, and can meet the necessaries of practice product in the field.