... sandstone permeability argentina american association tight gas laja formation tight-gas sandstone exploration geophysicist international energy 10 fracture university complex reservoir society reservoir characterization reduction outcrop applied geoscience cementation Deformation bands...

... The middle to small scale fractures typically play an important role in oil and gas exploration, which is more changeling to delineate than large scale fractures. In seismic data, those middle to small scale fractures generally behave as subtle amplitude or structural variation along seismic...

... ~+/- 24°. Increased pore-pressures from previous treatments remain elevated for ~7 days confining fluid distribution to near the well on ensuing stages. Sufficient pressure dissipates after leakoff providing opportunity for the fluid to propagate into previously opened fractures. Pore-pressure highs can...

... In recent years, the development of distributed acoustic sensing (DAS) technology has enabled direct monitoring of subsurface strain during hydraulic fracturing operations. Most low frequency (<1Hz) DAS signals (LFDAS) exhibit strain or strain-rate patterns that are characteristic...

... This work focuses on the development and implementation of an integrated 3D seismic and petrophysical workflow from vertical and horizontal wells (from the US Department of Energy-funded Hydraulic Fracture Test Site 1, HFTS-1) in the Midland Basin, United States, to characterize the Wolfcamp...

... or animations could be exported and shared. The MSEEL dashboard allows sharing of a fully interactive model. Logging while drilling wellbore image logs to detect pre-existing fractures integrated with microseismic, distributed acoustic sensing (DAS) and distributed strain sensing (DSS) during completion show...

... the two main geophysical problems, the first one is where the sweet spot is, the engineering “sweet spot” that includes brittleness index and stress are mainly analyzed here, and the second one is how to evaluate the effect of hydraulic fracturing. Aim at the main geophysical problems, firstly, we use...

... or microseismic events, out of zone injection, or even fracturing into the overburden. Subsurface data enables model calibration and inclusion of complexity that can accurately explain and constrain these multifaceted systems, helping to design reliable storage systems for CO 2 injection. A range of surveillance...

... Tensile components are often observed in tectonic and hydraulically induced earthquakes, leading to a variety of interpretations and conjecture as to underlying causes. In this paper a simple extension to the model of slip on a planar fracture is studied wherein texture or roughness is added...

... survey, I use a VTI model. The linear-superposition of this VTI background model and a set of induced parallel vertical fractures is applied to form an orthorhombic medium that describes the P-wave velocity of the monitor survey following every stimulation stage. The P-wave travel time differences...

... Natural fractures are widespread in rock. Fracture development depends on a wide range of factors such as burial history, temperature, strain rate, mechanical properties, layer geometry, and chemical reactions. We developed a three-dimensional (3D) simulator that couples tectonic strain...

... Explicit formulae are presented for anisotropic parameters for the orthorhombic case of a polar anisotropic body ( e.g. a shale) penetrated by a single set of vertical, rotationally variant fractures ( e.g. joints). upstream oil & gas expression anisotropy american association pa...

..., fracture detection both natural and induced, and how completions interact with various geohazards. We will also explain how this information can be collected and ultimately used to make decisions on items like optimal drilling target, stacked pay development, and even well spacing. Specifically, we...

... Normalized differential energy (NDE) of Stoneley wave is a well-known method for efficient borehole fracture detection, but it is found that fracture indications obtained by this method sometimes lack sufficient resolution and reliability. This paper examines several key aspects that can cause...

... Stratigraphic sequences are sometimes thin, rarely horizontal and juxtaposed due to faulting. Wellbore trajectories in such strata may not lie along principal stress direction. Perforations for hydraulic fracturing may also be inclined to the principal stress direction. Fundamental understanding...

... exploration geophysicist bohai sea anisotropy correction migration application correction society autocorrelation upstream oil & gas international applied geoscience rotation fracture perpendicular suppression Application of 3D converted wave processing technology in imaging of gas cloud...

... Fracture hits from infill well completion can cause damage to parent wells and potentially lead to production loss, which makes their detection and prevention highly valuable. Recently, fiber optic sensing technology has been applied in unconventional reservoirs for surveillance of downhole...

... A homogeneous isotropic background rock permeated by two sets of invariant horizontal and vertical aligned fractures is equivalent to a long-wavelength effective orthorhombic medium. Amplitude variation with angle and azimuth inversion (AVAZ) inversion has emerged as a fundamental and important...

... association hydrocarbon accumulation structural geology crust reservoir dissolution-disintegration reservoir eluvial-disintegration reservoir upstream oil & gas crystalline bedrock fracture applied geoscience sag bay basin ne china reservoir energy 10 characteristic exploration geophysicist...

...-fractures and fractures, the plane distribution is unstable, and it is difficult to predict through seismic technology. In order to further improve shale gas productivity, the application and breakthrough of shale gas “sweet spot” exploration technology is the key to realizing its economic exploitation...