【摘 要】
：
Digital rock physics is studied widely in oil and gas exploration for several decades.The current study intends to develop a new stress-strain simulation scheme to calculate P-and S-wave velocities al
【机 构】
：
Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,Yangtze U
【出 处】
：
EAGE-SCA International Symposium on Digital Rock Physics and
论文部分内容阅读
Digital rock physics is studied widely in oil and gas exploration for several decades.The current study intends to develop a new stress-strain simulation scheme to calculate P-and S-wave velocities along specific directions.To implement the stress-strain simulation,the digital rock is supposed to be made up of elastic solids and Newtonian fluids.Then the digital sample is compressed and pulled in a sinusoidal mode along one direction with periodic boundary condition in other directions.The variations of stress and strain with time are derived by solving wave equations.Stress and strain rate curves are obtained and transformed into frequency domain.The complex elastic moduli are the ratio of stress to strain in frequency domain.Velocities are calculated from complex elastic moduli and density.The accuracy is partially tested by static simulation.This approach is very suitable to calculate the velocities of digital rock with mechanical anisotropy and the measuring direction is in agree with that of field and laboratory measurements.In recent years,velocities measurements within and close to seismic frequency band attract more and more attention.The stress-strain simulation would become an important supplementary technique to help data interpretation.
其他文献
In this paper,a nanofocus X-ray computed tomography(X-CT)imaging system was used to observe the methane gas hydrate behavior in porous media.A series of experiments have been carried out to illustrate
The Silurian Longmaxi Formation shale in Sichuan Basin is an important shale gas reservoir for shale gas exploration in China,but the anisotropy of Longmaxi shale is not studied sufficiently.In this c
Combined with percolation theory and network simulation,percolation network models were built to investigate the relationship between dispersion coefficients and permeability.Periodic boundary conditi
To model the effect of pore-throat size heterogeneity and connectivity on transport properties low permeability reservoir.A 3D simple cubic pore-throat network by 20×20×20 was built based on the exper
We have developed a technique to identify individual fractures in 3D networks using microtomographic images.This promises the multi-scale analyses of reservoir fractures under specific circumstances,s
Pore volume compressibility(PVC),which is common to be determined experimentally,is one of the most important petrophysical parameters.Conventional experiments of PVC are carried out through varying t
Because new developments regarding the J function average capillary pressure have not improved the technique essentially and modifications from the rock pore network model are challenging,a new method
The two methods: graphical method and trapezoidal method are usually adopted to obtain pore structure eigenvalue.While,graphical method is inflexible and also causes inevitable computation error; the
A 3-D digital core reconstruction method which can be applied to multi-mineral rocks such as rocks of shale gas reservoir is presented.Digital cores of shale reservoir are built based on 3-D Markov Ch
Digital Rock Physics(DRP)uses multi-scale interrogation of reservoir rocks from whole core – plug – micro – Nano scale,and then working backwards to upscale and integrate the properties to an acceptab