基于多元线性回归方法的地应力研究

The Research of Crustal Stress Distribution by Using Multivariate Linear Regression

地应力场是地质力学与岩石力学研究的基本内容之一,地应力的大小、方向及其分布规律是油气田勘探开发中地应力研究的主要内容。在研究地应力场的过程中,区域边界条件的确定是个难点也是关键部分。以任丘潜山雾迷山组三段为例,视区域边界荷载为未知数,目标井地应力为约束条件,基于多元线性回归方法确定出区域边界条件,利用Matlab求解得出区域所受边界力。研究结果表明,基于多元线性回归方法求得的地应力值与实际测量的地应力值吻合较好。

Crustal stress field is one of the basic content of studying geomechanics and rock mechanics,whose size,orientation,and distribution are the main contents in the study of ground stress in oil and gas exploration.In the process of researching crustal stress,the determination of the regional boundary condition is not only difficult but also is key.Taking the third section of Wumishan,Renqiu oilfiled as example,putting the regional boundary loads as the unknown condition,target well＇s ground stress as constraints condition,based on the multivariate linear regression method,the regional boundary conditions are identified,the regional boundary loads are made out by using Matlab.The results show that the crustal stress based on polybasic linear regression is consistent with the actual measurements.