Study On Rock Physics And Log Interpretation Of Organic Shale

With the increasing scarcity of global oil and gas resources,shale oil and gas has become an important research focus worldwide.There is a lot of shale gas resource in North America,China,and Russia.Transitional facies shale,Continental shale and Marine shale abound in our country.There is some marine deposited shale in Sichuan Basin and Tarim Basin.The parameters of Thick layer,Depth and Organic carbon content is very beneficial in the area.The thesis include:organic shales with petrophysical log response characteristics,the relationship between total organic carbon(TOC)and petrophysical parameters,organic shale rock physics modeling and effects analysis,organic shale rock mechanics calculations.First,we studied the ?logR,a single empirical formula,the multiple regression method,a method for the evaluation of organic shales TOC)and kerogen are established.Then,we carry out the research relationship between petrophysical parameters Poisson's ratio,elastic modulus,Biot coefficient and TOC.Therefore,we believe the increase will largely affect the majority of elastic parameters TOC value becomes smaller.Then,based on multi-mineral components analysis of logging data,the rock physics model of organic shale is built.The model will be multi-mineral skeleton formation fluid properties and pore size and other factors on the impact velocity into account.Next,based on V-R-H model and Gassmann theory,the equivalent elastic modulus of the shear wave velocity of the formation is calculated.Various models are compared with the measured results applied transverse to predict the results of the study area showed good consistency,which validates the model applied to the study area.Finally,based on the above-mentioned prediction transverse isotropic and logging data were studied.Finally,based on the prediction of shear waves and logging data,isotropic and anisotropic shale rock mechanics parameters were respectively studied and calculation of the anisotropic,shale rock mechanics parameters,stress parameters and brittle fracture index are achieve.In this thesis,we build physics model of X Shale.In the share wave prediction experiments,predicted and measured results are best consistency based on the model of Krief.Research lay a solid foundation about "sweet hot" area traps and works of inversion.