... for CO 2 to attack cement more severely. This paper reports on an investigation into using shale formations as alternative annular barrier that can guarantee integrity during CO 2 injection and long-term storage. Building upon previous work done as part of our ongoing Shale-as-a-Barrier (SAAB...

..., brightness, and texture variations by using ML algorithms such as k -means clustering and support vector machine. We applied the workflow to characterize unconventional reservoirs based on multi-scale well data from the Eagle Ford Shale USA including core photos, core gamma ray, core plug measurements...

... with quantification of the fraction of interbedded water bearing layers. This more complete analysis forms an improved basis for decision making. The overall proportion of silt and shale in the formation are estimated from the clay volume from elemental spectroscopy logs. The silt and shale are apportioned between...

... rock structural geology lithology histogram automatic image segmentation case study boundary lwd obm resistivity image shale thalweg mexico microfacies artificial intelligence reservoir characterization classification interpretation lithology classification thickness clustering gulf...

... (4) . Transverse Isotropy Prediction by Well Logging Sonic logs respond to anisotropy in various ways. Compressional waves that travel perpendicular to the bedding formation in shales will not split. However, Hornby et al. (2003) noted that different velocities would be observed by changing...

... in wellbores containing solid laden fluids intentionally or unintentionally. Poor wellbore displacement or improper fluid conditioning can result in leaving some bigger size solids in the screen running fluid which could plug the screens. Also, the exposure of reactive shales to water base fluids can...

... conditions often deteriorate with time even when drilling with a ‘mechanically’ correct overbalance, more so when drilling with a water-based-mud (WBM) system. The occurrence wellbore instability (a time-dependent phenomenon) is mainly due to the rise in shale's pore and swelling pressures around...

... to their storage, a systematic study relating pressure to the gas adsorption capacity of Jordanian shale formations is conducted. Additionally, the pendant drop method and the Axisymmetric Drop Shape Analysis technique are used to measure and evaluate brine-gas interfacial tension (IFT) as a function of pressure...

... groundwaters from the near surface shallow aquifers to the deeper Vaca Muerta shale ~ 2000 m depth subsea in the Neuquén Basin for water disposal monitoring. The regions included in this study are Cruz de Lorena, Coiron Amargo Sur Oeste and Sierras Blancas blocks that are operated by Shell Argentina...

... Abstract A critical component of natural gas in organic-rich shales is adsorbed gas within organic matter. Quantification of adsorbed gas is essential for reliable estimates of gas-in-place in shale reservoirs. However, conventional high-pressure adsorption measurements for coal...

... Abstract We assess the huff-n-puff performance in ultratight reservoirs (shales) by conducting large-scale numerical simulations for a wide range of reservoir fluid types (retrograde condensate, volatile oil, black oil) and different injection gases (CO 2 , C 2 H 6 , C 3 H 8 ) by considering...

... improves reservoir understanding. log analysis structural geology flow assurance reservoir simulation energy & fuel central fairway reservoir characterization equation of state deposition shale connectivity geologic time workflow crude oil asphaltene communication mullin lower...

... Abstract Bedding layers are well-developed in shale and recognized to enhance the complexity of the hydraulic fracture network. A micromechanical evaluation approach of shale bedding layers based on indentation testing techniques was proposed. Rock thin section identification and scanning...

... is an essential step prior to the microstructural analysis. In this study, we trained a Random Forest classifier to relate certain features corresponding to each pixel and its neighboring pixels in a scanning electron microscopy (SEM) image of shale to a specific component type; thereby developing a methodology...

... geology upstream oil & gas shale inversion prediction seismic velocity in-situ stress lithology horizontal stress anisotropy minimum horizontal stress permian basin delaware basin geomechanical property pore pressure horizontal stress vertical resolution avo inversion Introduction...

... = σ a ,   σ θ θ = σ r r = σ r ,   ε z z = ε Z The first part is the preliminary tests, which aims to obtain the elastic properties of the shale sample. The compliance matrix, and the stiffness matrix of our shale were obtained. Through preliminary test...

... organically rich "hot" shales with total organic carbon (TOC) of 8 to 10%; these are located stratigraphically at the base of each member. Additional organic-rich intervals within the Lam and Meem are less-effective source rocks, with lower TOC values. The PSM consisted of 17 depositional events and 2...

... Abstract Oil and gas wells produce hydrocarbons for a limited number of years, and at the end of their production life they need to be plugged and abandoned. This process has to be done in a safe and economic way. Creep deformation of shale rock in uncemented casing sections may simplify well...

... reservoirs are the Cretaceous sandstones which are un-conformably overlain by Deccan basaltic flows and thin Tertiary sediments. Sembar formation of the Cretaceous age is considered as the main source rock with good TOC. In addition to the Sembar formation, intra-formational shales within Goru formation...

... permeability rocks such as shales. In contrast, tons of shale cuttings are generated and discarded at the end of drilling. Small scale testing, such as instrumented indentation test, could be performed on shale cuttings to obtain the mechanical properties of shale rocks. Unlike core samples, however...