... this gap immediately and builds up the contact pressure on the cement-rock interface. The value 0 Log time [day] of the contact pressure should be higher than the pre-set 0.1 annulus pressure. Note that this annulus pressure still has its physical meaning even if the gap is closed. It can be Fig. 5...

... on the current step event (Figure 4). Casing run stage is defined by activating pipe and cement elements with their initial. Cement hardening time is considered instantaneous. The model considers frictional contact between pipe-cement and cement-rock. Moreover, the casing exposed to salt formation...

... of hydration time and system conditions on the strength of the bond between the cement and casing. The Cement-Casing Adhesive Bond Adhesive bonds - or adhesion - is a mechanical property representing the resistance to separation of surfaces in contact. Mechanically modeling adhesion strictly involves...

...-lapse wave velocity data collected. Detail laboratory procedures are described in Adam et al. (2015). We focus on characterizing how fluid substitution and cement dissolution due to CO 2 injection affects time-lapse velocity changes. cement sandstone grain-contacting cement moduli velocity...

..., the following are performed: (1) remove the top centering device from the curing mold; (2) remove the bottom centering device from the mold; (3) determine the height of the cement composition in contact with the inner pipe; and (4) place the test specimen back into the water bath and let the temperature...

.... Fig. 17. Radial Stress development. Fig. 18. Tangential Stress development. Finally for the contact analysis, with the help of Fig. 19 it was possible to distinguish the different steps as functions of the pseudo time for the *STATIC analysis of the cement strengthening (Steps 8, 10, 12, 14, 16, 18...

... in the Appendix , involved: attaching a steel coupon to the cell paddle, filling the cell with heated, solids-free NAF, rotating the paddle for 10 min contact time, removing the paddle and re-immersing in solids-free spacer, repeating the circulation with solids-free cement fluid, measuring...

... temperature. Compared to CaseA, the debonding in CaseB requires a larger more temperature change and a longer injection time. For CaseA, the initial contact pressure is low due to the zero effective stress in the cement sheath. Therefore the tensile stresses induced by the shrinkage of the casing alone...

.... Two new features in this Engineered Self-Healing Cement' which is first time in Oil Industry: Seals crack or micro annulus within cement sheath when in contact with water and Does not close the perforations through which oil is produced. Note: Up till now, there was similar product...

... consideration of the cavern well within the numerical model allows to directly calculate the additional stresses which are induced in the cavern well components casing, annulus cementation, and contact surfaces by cavern convergence processes in space in time. Additionally, thermally induced stresses due...

... ABSTRACT The work described in this paper focusses on identifying the impact of contact cement shape on pressure and stress distributions near the cement-grain contact. Numerical simulations were used with elastic properties of quartz and clay to identify the shape effects. The results showed...

... ; Taha et al. 2021 ). Extensive testing of the sealant was conducted, including measuring the sealant wettability over several surfaces, including steel, shale, and cement, and viscosity with time. Viscosity was measured using a Brookfield RST rheometer with a coaxial spindle. The contact angle...

... Upstream Oil & Gas bearing layer porosity log analysis vdl development well well logging formation arrival time oil water contact arrival time estimation cement bond log variable density log Symposium attenuation oil bearing layer cbl-vdl log travel time ABSTRACT...

... contact between cement stone and casing reduced by 2 times in compliance with acoustic cement bond logging data after fracturing operations. The negative impact is even more pronounced in the perforation interval ( Figure 2 ) A calculation of the required compressive strength was performed...

... iterativly, from tectonic tilt to closure deformation, followed by hydrocarbon re-migration and cementation differentiation across the paleo HC water contact. This event results in lateral sealing and tilted HC accumulation. HC migration times are often neglected on geological time scales and replaced...

.... The inner formation surface contact pressure and cement-formation aperture versus time for case Sh. 2. The salmon region is the Plateau process, and the green region is the Charging process. The orange line represents the aperture between the cement and formation; the blue line is the confining pressure...

... in the following equation ( )Fshear = C0 A + tan Fnormal (1) where refers to the pulling force, A denotes the contact area, and Fnormal is the normal force applied on the contacting interface. In the lab test, no additional force was applied on the side surface of the cement. The cement and the casing got...

... of the salty formation during the passage and the contact of the cement slurry with it. The methodology developed is based on the times and surfaces of contact of the slurry with the formation that passes through the displacement, and its final aim is to evaluate the amount of dissolved formation...

... ABSTRACT: In mechanized tunneling, due to the TBM shield's advance, an empty annular space remains behind the segment, which often filled with pea gravel and cement grout. Since about 90% of rock displacement occurs after boring at a short distance from the tunnel's face, contact grouting...