... to the fracture via coupled excess compliances. This reasonable extension of a purely planar fracture model leads to media with triclinic symmetry, even though the background medium may be isotropic. Moment tensors that have pure in-fracture-plane slip, built in an effective medium with coupled excess fracture...

... A number of earthquakes in West Texas have been monitored with a relatively high-density seismic monitoring network since 2018. The number of stations enables precise locations and numerous moment tensors to be determined in this area. High-precision (relative) locations allow for fault...

..., the seismic source representing the perforation shot must be known. To the authors’ knowledge, there is no available representation of such a source. We propose a three-mechanisms source model with three structured moment tensors whose magnitudes are to be determined. Following a three-step procedure, we...

.... inversion trajectory exploration geophysicist simultaneous waveform inversion drilling reservoir characterization tensor american association innanen figure 3 upstream oil & gas waveform inversion derivative applied geoscience kazemi acquisition geophysics international receiver...

... Microseismic data has become a routine tool to help understand hydraulic completions. This data is often used to optimize production and better understand the natural and induced fractures in and around the reservoir. Additionally, well-constrained moment tensors provide information about how...

... geoscience transducer carbonate reservoir simulation chaves fm american association tensor sergipe-alagoas basin society brazil Comparative analysis between laboratory measurement and numerical simulation to evaluate anisotropy in Coquinas from Morro do Chaves Fm. A Brazilian pre-salt analog...

... geoscience u-net architecture convolution neural network artificial intelligence ulate-net energy 10 uearly-net tensor society Joint 3D inversion of gravity and magnetic data using deep learning neural networks Nanyu Wei*, Dikun Yang, Department of Earth and Space Sciences, Southern University...

... Seismic dip calculation is a technique that is commonly used in seismic interpretation and reservoir characterization to emphasize faults and geological features in seismic data. Gradient structure tensor (GST) is one of the techniques using which structural dip and azimuth are estimated...

... & gas reservoir characterization international american association fracture characterization asthenosphere inversion conductivity tibetan plateau fraction energy 10 tensor The temperature structure of the upper mantle based on magnetotelluric data beneath the western Qaidam Basin...

... generated by finite faulting, is important in order to calibrate the geomechanical simulation with field-seismic observations. To this end, we have developed a workflow that links geomechanical forward modeling to seismic moment-tensor inversion. We have tested this workflow for the dynamic rupture...

... tensor to create a model segment on the unconformity surface for every magnetic anomaly on every line in the aeromagnetic survey. Because the tensor is a 3D spatial derivative of the magnetic field, it automatically reduces the influence of regional magnetic field changes to focus the inversion process...

... of seismic strain with an absolute measurement offers a pathway to answer fundamental questions on the nature of hydraulic fracture propagation, such as the degree to which aseismic deformation (creep) is present in and around reservoirs during stimulation. upstream oil & gas tensor strain tensor...

... and data interpretation. DAS seismic measures strain/strain-rate (a second order tensor) along the DAS cable compared to a vector velocity measurement from conventional 3C geophones. We developed a 3D finite-difference tilted-orthorhombic elastic modeling code with strain-rate output to simulate DAS...

... It is very challenging to accurately invert for moment tensors of microseismic events recorded using a single-borehole geophone array. Full-waveform moment-tensor inversion uses the phase and amplitude of microseismic waveforms to invert for the moment tensor of a microseismic event...

..., an of the particle-velocity vector, a dot over a variable denotes elastic propagator for the underlying solid earth, and explic- the temporal derivative, i j is the second-order contravariant itly satisfy the correct boundary conditions at the bathymetric stress tensor, and f i is the contravariant body force per...

... affect these the matrix shear modulus and the volume fraction as well as physical properties the most. by the effective elastic tensor of the rock. To establish the relation between these characteristics and the microstructure Theory parameters we considered three types of isotropic models on the core...

... the geometry of the seismogenic structures. In addition, we performed waveform moment tensor inversion to determine earthquakes’ source mechanism for our study area. Furthermore, the state of stress is determined by using stress inversion on the basis of the obtained source mechanism. As a result, five...

... reservoir characterization cambridge university press hydraulic fracturing artificial intelligence microcrack machine learning upstream oil & gas tensor exploration geophysicist 10 green function rake angle equation seg international exposition blue solution geophone...

... Moment tensors of kinematically double-couple microseismic events triggered in anisotropic formations are known to exhibit non-double-couple focal mechanisms. Their weak anisotropy approximation reveals the combinations of anisotropy coefficients of vertically transversely isotropic focal...

... The data completion problem involves recovering missing seismic data from incomplete observations. 3D seismic data can be naturally arranged into an order-3 tensor with dimensions for time, offset, and gather number. Redundancy in the data leads to a low rank tensor. We apply low rank...