... mechanical properties using a sandstone core, such as strength, stiffness, and deformation behaviour, under the influence of 100 hydrogen injection and extraction cycles. Additionally, permeability alterations induced by hydrogen gas ingress and egress were examined to understand the impact on fluid flow...

..., Poisson's ratio, tensile strength, and Biot's poroelastic coefficient. The minimum and maximum lateral strain values are obtained once the predicted tectonic stress values match the microfrac testing results of each formation breakdown and fracture closure measurements. Finally, basic depth correlations...

... maps for various samples recorded at 2, 12 and 23 MHz. In this paper, we continue this work by the fields investigated to even higher frequencies. This paper includes T 2 measurements of bulk fluid (doped H 2 O) in sandstone plugs and carbonate plugs at two new higher field strengths (33 and 127...

... Abstract Proper understanding of the strength of rocks, and its variability along the length of the well, is essential for efficient and economic drilling operation. Traditionally, the industry has used log-based strength estimates calibrated to strength measured on core samples. However...

... drillstem testing fracture characterization drilling operation pore pressure upstream oil & gas borehole breakout wellbore design drillstem/well testing geomechanical model reservoir characterization hydraulic fracturing pressure transient testing strength correspond maximum horizontal...

.... Thus, intervals with high brittleness are considered a good candidate for hydraulic fracturing. However, many authors argue that this viewpoint is not reasonable because rock brittleness is not an indicator of rock strength and the current brittleness indices are based on elastic modulus or mineralogy...

... differential sticking borehole wall equation contact area well logging strength roller differential pressure permeability log analysis mud cake porosity frictional force friction coefficient SPWLA 58th Annual Logging Symposium, June 17-21, 2017 A PETROPHYSICAL ORIENTED METHOD FOR THE ANALYSIS...

... for correlating well-log data. Calibration to the mechanical earth models constructed from sonic-derived mechanical properties to help provide realistic deformation parameters for hydraulic fracturing design purposes. Strength information for developing a failure locus for the material. The evaluation...

... one being contamination of the cement during and after placement. When contamination occurs, cement properties and their changes can differ greatly from the standard simulated lab sample measurements. In severe cases, the cement may not set and develop the required strength, resulting in no structural...

... conditions applicable to the downhole environment which is very different? Factors such as borehole and formation fluid contamination, lithology, pressure and temperature may significantly affect the measured laboratory properties, and the curing times and compressive strengths may not be representative...

... the following: casing design attenuation empirical curve well logging Upstream Oil & Gas cement cement and bond evaluation strength Baker Hughes log analysis casing and cementing Thickness spwla 55 receiver cement map cement bond tool response cement evaluation log pipe formation...

... magnetic field strength, its inclination and azimuth. Example data was diverse and varied from conventional sediments to geothermal volcanics along with anomalies from tool string magnetization to remnant magnetic fields. Data with a high rotation rate were also tested, analyzed and corrected...

... Abstract The papers presents the scratch test, a novel technique born in the late 90's at the University of Minnesota that provides a direct measure of the rock strength (uniaxial compressive strength). It is a simple, non-destructive, fast and robust test that bears the unique advantage...

... the success factors, review rock strength issues and compare the risks of tractor-based conveyance to drill pipe conveyance. Building on experience, success factor analyses and best practice guidelines, the success rate of OH tractoring has steadily improved over the years. One of the traditional limiting...

... at the same depth reference and rock facies. Each plug is brought to failure in a single stage triaxial test. The four independent tests are used to construct a Mohr-Coulomb failure envelop. Bedding perpendicular and parallel Brazilian tests are also performed to measure tensile strength. Mineral composition...

... now. Extra relaxation due to diffusion in internal field gradient is another example where spatially varying relaxation strength may obscure the direct relationship. Better understanding of their interplay may be exploited to our advantage. In this work, we theoretically investigate the interplay...

... ABSTRACT The characterization of rock strength is perhaps the most important task in choosing the optimal type of completion in soft-sediment reservoirs. While two strategies have commonly been used to guide this decision, both have significant shortcomings. A new technique is presented...

... ABSTRACT In this study, all the available log, drilling and geological data of a well drilled in the Gulf of Suez, were used to determine the rock-mechanical properties, rock-strength and optimum mud-weight windows. The main objective of the study was to identify the most suitable entry point...

... ABSTRACT Sand production is considered to be a major technical and economic issue in the oil industry. The maximum fluid pressure drawdown before the formation sand fails depends on several rock-mechanical properties (e.g., sand strength, shear and bulk modulus, Poisson's ratio...

... with a cement job are compromised, particularly in drilling extended-reach and horizontal wells. The development of a strength and stress profile for the well is the first step in understanding wellbore instability problems. These profiles are constructed using all suitable data, which include offset drilling...