Abstract：In order to deal with serious sanding problem in Shengtuo Oil Field in high water cut period，triaxial tests on the reservoir sandstone are carried out，and reliable data are gained. A few data closely related to the triaxial compression strength of the rock are selected as regression variables after well measurement data and core test data are analyzed and compared. The regression relation of compressive strength to well depth，rock density，porosity，interval transit time and Young¢s modulus of the reservoir rock is established in the process of introducing new important variables，checking the old variables and eliminating the unimportant variables continually. The regression relation can be used to calculate the compressive strength of reservoir rock in site and guide the sand control or fracturing projects.
