用岩心实验方法测定野外应力

THE DETERMINATION OF THE FIELD GEOSTRESS USING CORE-TEST. PED

本文介绍了２种由室内岩心实验测定野外应力值和应力方向的方法。实验测定的结果有很好的重复性。与其它方法测得的结果相比较，一致性很好。实验表明：辽河油田冷家堡地区的最大水平主应力方向为北东向；垂向主应力是中间主应力。前者给出了油、水井不宜间隔排列的方向，后者指出人工压裂裂缝是近于直立的。

This paper gives two ways determining field geostress and its direction by means of core-test and their results. The repeatability of the results is very good, and agree with those obtained by other methods. The test result shows that, in oil filed the direction of the max horizontedmain-geostress in Lengjiapu area is NE, and the vertical-main-geostress is an intermediate one. The former gives out the direction which can not be used in a staggeted pattern. The latter indicate that figuration of the induced fracture is nearly vertical.