Experimental Study On Rock Mechanical Characteristics Of Chang 7 Reservoir In Longdong

With enhanced the efforts of oil exploration,people come to realize Chang 7 reservoir in Longdong has great potential of development.But Chang 7 reservoir in Longdong has never been systematically studied,especially research effective on reservoir characteristics and experimental study of rock mechanics.So,now it can not provide a valid basis for the theory of the late mining and fracturing.In this paper studying for the reservoir,it is based on research of indoor rock mechanics experiment to analysis of the petrophysical properties of Chang 7reservoir in Longdong and applications.In this study,it is based on the physical properties of materials,sheet of rock and scanning electron microscopy to clear the characteristics of Chang 7 reservoir in Longdong.On the basis of that,the writer have took regular acoustic tests and triaxial strength tests to obtain characteristic parameters of rock mechanics and build the model of dynamic and static elastic parameters.Because logging data has many advantages,such as high resolution and good continuity,the use of logging data can interpret rock mechanics parameters and establish the model to calculation rock mechanics parameter.The use of logging data also can draw sectional view of rock mechanics parameters of five predicting wells.All of this lay the foundation of the research of crustal stress and borehole stability.In situ stress study,the writer identify Huang model to establish of longitudinal profiles of stress.On the basis of the overall analysis of wellbore stability,the writer select the model of calculating collapse pressure and fracture pressure proposed by the previous to predict the collapse pressure and fracture pressure of the five wells.