... the pore pressure and fracture gradient window. Displacement rates were optimized to facilitate good displacement efficiency for hole cleaning. The slurry design was tailored with special additives to provide a synergetic effect of improving mechanical properties and minimizing seepage losses. Multiple...

... and operations subbiah well logging flow assurance strength perforation tunnel approach failure criteria mechanical behavior prediction conference elastic property january 1 stabilization proc sand production compressive strength journal mechanism propensity constitutive model pore pressure...

... Abstract Recently a set of engineering charts have been developed for the time-dependent stress and pore pressure responses at the wellbore surface under the ramp-type, finite-length fluid injection conditions, based on a semi-analytical solution with the use of Laplace-Fourier integral...

... stress models. If the effects of fluid diffusion and pore pressure variation in the formation is negligible, stress models under "Solid Mechanics" should be used, i.e., "Elastic (no time involved)" stress model corresponds to the classic elastic solution of stresses around a borehole ( Fjaer et al. 1992...

... ) . Pore Pressure Pore pressure methods applied are based on Terzaghi's effective stress principle. Terzaghi's principle states pore pressure as the difference between the overburden pressure and the effective stress. Effective stress is the amount of overburden pressure that is carried by the rock...

..., optimized casing design were put in place. The integrated approach led to quick influx detection, proper definition of mud window, i.e. Pore Pressure and Fracture Gradient together, helped to prevent the losses, design of fit-for-purpose bridging strategy to ensure full drilling fluid column at all time...

... stability analysis drilling mud weight well trajectory geological subdiscipline abdali field horizontal stress geology stability analysis mechanical property zubair formation sedimentary rock rock type mud weight pore pressure stress magnitude Introduction The Abdali field in North...

... Abstract In this work, the theory of anisotropic dual-porosity dual-permeability poroelastodynamics is used to simulate the responses of pore pressure, displacement, and stress of a fluid-saturated transversely isotropic naturally fractured cylindrical rock sample. The sample is subjected...

... Abstract In this work, we use the theory of multi-porosity multi-permeability porothermoelasticity to derive the analytical solutions of pore pressure and stresses for an inclined wellbore, accounting for a rate-dependent mud cake buildup on the wellbore wall. The solutions are further combined...

... of carbonate rock with dimensions of 20 × 16 × 16 inches. A true-triaxial load frame setup was used to maintain 2,000-psi pore pressure inside the water- saturated block during acid injection. A series of experiments was conducted at various acid injection rates with injection data acquired and analyzed...

... geological subdiscipline stress analysis pore pressure stressed faults and fracture analysis economic geology petroleum geology shallowest formation structural geology maximum horizontal stress principal stress reservoir quality critical stress analysis overburden effect Introduction...

... realistic DFN. Reflection on geological timescale pore pressure preservation in the source rock provided additional qualitative validation. Natural fractures are ubiquitous in shale gas plays and are posited to be one of the most critical factors in the productivity of stimulated wells ( Apaydin et al...

... /Pa.sec)=permeaibility in millidarcies × 9.9 × 10 -13 Also note that the time term in the diffusivity coefficients in the table is converted into days from seconds. The in-situ stresses and origin formation pore pressure are as follows: S V = 25   M P a S H = 18   M p...

.... Wellbore stability and fault stability models have been constructed using both a well-centric approach and a full field-wide 3D numerical solution. It is clearly observed that field-based approach provided us more accurate estimation of overburden stresses, variation of pore pressure across the field...

... in.). Prior to acid injection, the block was fully saturated with water and taken to 2,000-psi pore pressure and 4,000-psi confining stress to simulate downhole conditions. To evaluate the created wormholes, the tested block was cut open along the fractures followed by X-ray CT scanning of selected zones...

... stress tests; and (ii) the proposed inversion scheme allows insight to be gained from both successful and unsuccessful tests, including in formation conditions other than the minimum horizontal stress. reservoir geomechanics pore pressure mud density hf mandrel combination Reservoir...

... modules, which can capture real-time phenomena introduced by the time-dependent fluid pore pressure perturbation and the wellbore time-dependent failures in tension and/or compression. Upstream Oil & Gas Wellbore Design pore pressure module mudweight window criterion software cohesive...

.... This model defines the mechanical properties, pore pressure, and in-situ stresses of the different subsurface formations. Afterwards, a fully 3D fracture simulator has been used to simulate the fracture growth within the candidate injection zone at different injection scenarios. Additionally, the fracture...

... learning wellbore integrity Artificial Intelligence predict fracture pressure correlation Wellbore Design pore pressure prediction fracture pressure gradient accuracy coefficient fracture gradient society of petroleum engineers artificial neural network ann approach neural network...

... Abstract It is known that pore pressure (P p ) is an integral part for the well planning process. Pore pressure can be directly measured from the wireline pressure and well tests, or indirectly measured from seismic velocities, well logs, and shale densities. While the direct measurements...