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Fast iterative solver for 3D finite-element modeling of controlled-source electromagnetic responses with vector and scalar potentials
Magnitude and Slip Scaling Relations for Fault‐Based Seismic Hazard
Variable Daily Autocorrelation Functions of High‐Frequency Seismic Data on Mars
Vertical transversely isotropic elastic least-squares reverse time migration based on elastic wavefield vector decomposition
On singularity points in elastic orthorhombic media
Earthquake Stress Drop for a Circular Crack in an Anisotropic Medium
Variability in the Natural Frequencies of a Nine‐Story Concrete Building from Seconds to Decades
Dynamic Responses of Embedded Rock Pile Groups due to Rock Burst considering Coupled Pile-to-Pile Interaction
PP-wave reflection coefficient in stress-induced anisotropic media and amplitude variation with incident angle and azimuth inversion
Unstable Pillar Failure under Soft Loading Condition
Depositional and diagenetic controls on the mechanical properties of rocks in the Monterey Formation of the Santa Maria Basin, California
ABSTRACT The Monterey Formation of Central and Southern California has produced billions of barrels of oil since the early 1900s. The Monterey Formation in the Santa Maria Basin is a tectonically fractured reservoir, meaning that the fractures formed through natural geologic processes; they are not human-generated artifacts. Open natural fractures provide the effective porosity for oil storage and the permeability pathways through which oil flows from rocks to wells. Monterey strata are notable for a diverse range of lithologies characterized by contrasts in texture and composition. Not all Monterey rock types contain natural fractures. Structural geologists applied the concepts of mechanical stratigraphy to the Monterey Formation to explain fracture variability. Hard rocks, including chert, porcelanite, and dolostone, contain extensive open-fracture systems, while softer lithologies like siliceous mudstone and organic-rich mudstone have few or no open fractures. However, the words “hard and soft” or “strong and weak” are inexact and subject to interpretation. This report constrains these qualitative descriptions by using engineering-geology data to associate rock properties with quantitative measurements of rock mechanical strength.