...) was conducted for the second stuck-pipe incident. Finally, recommendations are proposed to mitigate the drilling challenges. geology geologist halide complex reservoir wellbore integrity hydraulic fracturing reservoir characterization shrinkage coefficient threshold wellbore design mineral...

... risk point shale gas geological subdiscipline deformation clastic rock complex reservoir china government reservoir characterization engineering china petroleum machinery natural fracture dislocation wellbore fracture petroleum science horizontal principal stress shrinkage deep gas...

... slurry pressure upstream oil & gas reservoir geomechanics shrinkage cement sheath cement chemistry cylinder mpa cement formulation time cement shrinkage piston reservoir characterization steel cylinder cement paste integrity sensor cement lateral ARMA 22 386 Experiment study...

...; Nygaard et al., 2014). Such discrepancy in assumption causes great uncertainty in analyzing safe operational windows for maintaining well integrity during carbon injection. interface cement formulation shrinkage cement chemistry reservoir geomechanics cement-casing interface setup bottom...

... is used for numerical calculation. According to the influence laws of the plastic zone, the maximum displacement around the cavern, equivalent strain and volume shrinkage rate, the stability of the salt cavern gas storage when the wells are arranged in a triangle pattern is analyzed. And the pillar width...

... for soils coupled with digital image correlation (DIC) was employed to capture free shrinkage and desiccation cracking. Reinforcement of bentonite clay with 1.0 % wt. basalt fibers was shown to be effective in reducing crack propagation and separation. 1. INTRODUCTION 1.1 Research Significance Each...

... material model was implemented in the stand-alone code, Casinteg, to simulate cement behaviour in field conditions. Numerical simulations were performed, based on the IDDP-2 well scenarios, to investigate the effect of cement retarders, cement hydration heat and cement shrinkage on the casing stresses...

... due to chemical shrinkage is imported into a coupled mechanical model that calculates the pore pressure drop and the resulting change in stresses. The results of the proposed modelling methodology are verified using lab experiments from the literature. The results provide new insights in understanding...

.... However, for coalbed methane (CBM) reservoirs, gas desorption-induced coal shrinkage also contributes to the stress change, which is rarely included in the theoretical models. In this work, the in-situ stress evolution during coalbed depletion is first investigated through combining the effect...

... including deformation, dilatancy safety factor, plastic zone, volume shrinkage, and equivalent strain are used to analyze the stability of the cavern. Results show that the displacement, plastic zones, and equivalent strain gradually decrease with increase of sediment heights. The dilatancy safety factor...

... of formation fluid, (ii) cement shrinkage and (iii) temperature increase in cement during curing. We used a finite element numerical model to investigate the impact of each condition on the radial stress of cement in a hypothetical wellbore. The presence of formation water during cement hydration controls...

... region is set as the organic-rich region. A fully coupled numerical model considering the whole flow spectrum of shale gas and the shrinkage of organic matter is built. Some conclusions are drawn from the simulation results; for example, the shrinkage of organic matter enlarges the alteration angle...

..., and disking) significantly; excessive shrinkage during cement hardening promotes onset of debonding failure which largely endanger the wellbore integrity in the long-term. In summary, to obtain a robust evaluation of wellbore integrity, a systematic evaluation of the cement hardening process...

... wall external stress acid borehole closure acid exposure pierre carbonate reservoir characterization ionic strength borehole acid treatment natural barrier hollow cylinder test deformation shrinkage ARMA 21 1931 Impact of acid treatment on shale creep and formation of natural barrier...

... previous estimates of the effective state of stress of cement range from zero to the full weight of the cement column, shrinkage, consumption of pore fluids by hydration, and loss of pore fluids to the formation result in intermediate values consistent with experimental results on microannulus formation...

... failure to a case study from the Bowen Basin in Eastern Australia, where the cleating and shrinkage of coal are important considerations. The analytical modelling starts with an effective stress field that incorporates both poroelastic effects and the shrinkage of coal matrix due to gas desorption...

... poro-elastic hydrogeological profile is subjected to depressurisation in combination with a time-dependent Richard’s equation and linear elasticity. The effect of sorption-induced shrinkage is included in the model using the definition of and the concurrent effects of shrinkage on both permeability...

... specimen complex reservoir interface volumetric strain international journal porous media coal seam gas adsorption adsorption stress surface stress shrinkage Microstructure deformation ARMA 19-252 Thermodynamic-consistent adsorption-swelling models for coal Yida Zhang University of Colorado...

... , the borehole shrinkage rate in the unconsolidated sandstone is about 0.0006 h -1 and in the soft mudstone is about 0.00045 h -1 . If the borehole is exposed for 20 days during drilling, the shrinkage will exceed 20%. The mechanical characteristics of unconsolidated sandstone and soft mudstone can be analyzed...

.... complex reservoir adsorption cleat strain model coal bed methane Upstream Oil & Gas volumetric strain coalbed methane compressibility volumetric response experiment anisotropy characteristic coal seam gas mechanical compression coal bulk Poisson shrinkage international journal matrix...