水力压裂法测定华北地下深部应力

水力压裂技术是当前测定地下深部实地应力的重要方法,现首次尝试于我国。我们与油田部门配合,在运用水力压裂法增产石油的同时,在我国华北的大港、河间、丰南、黄骅、北镇、庆阳、潜江等地区进行了深度1000——4000米应力的实地测试,共取得62个深井数据。 本文论述了野外结果及有关计算。表明地下主应力值与深度呈线性关系,各地区亦有差别。本文同时讨论了破裂过程与破裂方向,以及应力随深度分布的一些特点等问题。

STRESS MEASUREMENTS AT DEPTH IN NORTH CHINA BY HYDRAULIC FRACTURING

In measuring stress at depth, the method of hydraulic fracturing is now receiving more attention. In China, this method is for the first time employed in oil wells in conjunction with the injection of water to increase oil production. On the North China Plain, 62 oil wells of depths of 1000-4000 meters have been tried to measure stress in-situ. They are in the oil fields, Dagang (大港), Hejian (河间), Fengnan (丰南), Huanghua (黄骅), Beizhen (北镇), Qingyang(庆阳), Qianjiang (潜江) etc.This paper gives some of the field results and related calculations. The stress thus measured appears to vary linearly with depths, differing slightly with the areas. The processes of fracturing and directions of fracturing as well as the pecularities of stress variations with depths are also discussed.