Research On Mathematical Model Of Relevance Between Mechanical Properties Of Rock And Electrical Property

The rock strength decline will cause the rock rigidity descent, and result the acoustic wave propagation velocity descent in the rock, the flood water corrosion and erosion over a long period of time will also cause the rock density to drop. Along with development of logging technology, long spaced AL and rock DEN widespread use particularly, people may collect longitudinal wave and transversal wave directly from the AL, and recombination DEN to accurate describe the change of rock strength. AL and DEN and so on can reflect the layer's mechanical property; it may use these data to determine the rock mechanics parameter, including modulus of ghearing, young's modulus, Poisson's ratio and so on. Therefore, north of Daqing placanticline in well drilling process of adjustment well, it is more important sense that research on technology to take precautions against the high permeability zone overcut for guarantee security of well drilling construction and improves the cement job quality.This article through select different formation core specimen on 1997 and 2006 from three oil well to test the rock uniaxial compressive strength and shear intensity, and analyze changed regular pattern of elastic modelling quantity and modulus of ghearing and elastic strength on new and old oil well rock mechanical test. Utilize experimental instrument such as the X-beam diffraction and the SEM and so on to find out mainly factor to affect rock mechanics parameters in Daqing placanticline northern. And compare the new oil well's log data such as SDT and SP and density and so on to olds'. Analysis the log data's alternate and the reason of changed. At the same time, combine the log data and mechanics parameter and from the way of mathematical statistics find out the mathematical model to calculation rock mechanic parameters apply to Daqing Lamadian area.Research on rock mechanic property variation situation of main layer's after 30 years'infusion development in Daqing Oil Field Lamadian area. Take a sample from the abnormal log data to run identify experiment such as X-beam diffraction and the SEM and the polarized light. Use hole depth correspond rock mechanic parameters and electric nature data and fit the relevance mathematical model between rock mechanics parameter and electric nature data. After data confirmation, this model has high accuracy. Its coincidence rate is greater than 80%.The Daqing Oil Field Lamadian area new well drilling have happened the phenomenon of sandstone borehole enlargement in recent years, this phenomenon in connection with flood water corrosion over a long period of time and Lamadian area structural location directly. Apply this model to predict the rock mechanics parameter may precaution the project complex question which causes sandstone loosens. Moreover unites establish the calculate software and make the model have more applicability.