Research On Stress Field Distribution Of Chang6Reservoir In Jiyuan Oilfield

This thesis, based on rock mechanics experiments, research and analysis the physicalcharacteristics and the direction and magnitude of stress distribution.The petrophysical properties of Chang6have been analyzed on the basis of basicphysical parameters and laboratory rock mechanical parameters tests,including P and S wavevelocities at normal temperatures,dynamic and elastic parameters relation with density andtheir changing regularity,rock deformation characteristics of statics at triaxial compressioncondition and statics parameters and their relation with pressures, dynamic and staticconversion relationship.Based on the above experiments researches,the paper adjusts the calculation models ofrock mechanical parameters in logging interpretation,the new calculation models to Chang6reservoir and rock mechanical parameters profiles of Chang6were established.By comparing ground Stress calculation models,the paper has taken the Cluster Springmodel as the ground stress calculation formula,and by using the ground stress calculationresults of the fracturing materials,the Cluster Spring model was adjusted,so ground stressprofiles were established.By using the microseisms materials,it was confirmed that thedirection of the ground stress.By three dimensional stree field reservoir modeling, we get maximum level of theoverall study area average principal stress direction and storage compartments stressdifference. For reservoirs with bottom water, we analysis the typical profile, the verticalstress profile which provide some basis for fracturing.