... of subsidence, loss of seal integrity, fault reactivation and other effects when an oil or gas field is developed. In standard geomechanics tests we make a CT image of a plug (e.g., 1.5-inch diameter and 3-inch length) before and after a geomechanical experiment using a 50 μm voxel size. Hence, we get...

... elastic stiffness coefficient bedding mudrock reservoir geomechanics biot young clastic rock flow in porous media reservoir characterization perpendicular plug moduli static young conversion static elastic stiffness coefficient poisson gpa fitting conversion stiffness coefficient...

... ABSTRACT: The primary objective of this study is to characterize the full description mechanical properties of rocks. The study aims to achieve this characterization using single stage triaxial (SST) tests instead of multistage triaxial (MST) test by grouping non-consecutives plugs from...

... upstream oil & gas structural geology rock type sedimentary geology brazil government log analysis resolution sedimentology flow in porous media spherulite well logging geological subdiscipline spherulitic shrubstone plug carbonate rock salt tectonics europe government porosity...

... and brine-saturated limestones subjected to cooling (ΔT) or CO 2 depressurization (ΔP). Plug samples were prepared from Indiana limestone and a limestone from the Green River Formation, outcropping in Sanpete Valley, Utah, USA. The ΔT-treatment consisted of a thermal shock from 60°C to −78°C, while the ΔP...

... ABSTRACT A novel approach to study hydraulic fracture initiation and propagation inside Nuclear Magnetic Resonance core flooding system (NMR) was examined on 38 mm diameter (1.5") outcrop sandstone rock plugs. A 3.4 mm diameter and about 35 mm long borehole (two-third of the plug's length...

... provided when taking a horizontal core, we decided to use this unique opportunity to test the effect of temperature, in situ vs. ambient, on core testing results. geologist plug reservoir characterization shear velocity elevated temperature upstream oil & gas well logging geological...

... the excavation. When creep occurs adjacent to a stiff inclusion such as a concrete plug, it is expected that the stress state near the inclusion will become more hydrostatic and less deviatoric, promoting healing (permeability reduction) of the DRZ. In this scoping study, we measured the permeability of DRZ rock...

... propagation plug fracture initiation injection acoustic emission experiment fracture propagate strength sandstone magnitude breakdown pressure ARMA 22 0545 Reducing Breakdown Pressure in Hydraulic Fracturing: A Novel Cyclic Injection Procedure Gang Han Aramco Americas, Houston, TX, USA Munir...

... integrating the density logs for the vertically- oriented core plugs. The horizontal minimum stress inferred from horizontal core plugs matches well with bounds obtained by hydraulic fracture stress testing and corresponding to an average minimum tectonic strain of 170 microstrain. The maximum stress is found...

... ABSTRACT: In this work, we have developed a methodology to model the stress evolution in cement plugs during hydration. The model begins with the slurry state of cement and calculates the water consumption and void creation over time as the hydration reactions progress. The void volume change...

... is eccentric, causing side impact with the wellbore. data quality drilling operation frequency drillstring design drilling equipment bit selection bit design rotational speed plug drillstring dynamics presented bit 2 upstream oil & gas log analysis well logging lateral acceleration...

... Abstract Understanding acoustic velocity variations in reservoir rocks is key to reservoir quality assessment using sonic tools and seismic data. We conducted experiments aimed at investigating the effects of varying stress on the acoustic properties of 19 limestone core plugs ("Core...

... Abstract Bentonite has been identified as a cost-efficient and durable solution for alternative plugging options in shallow wells due to its ductile, self-healing, and chemically stable properties. In this work, we evaluate the application of bentonite as a sealant for deep geo-energy wells...

... strength correlation plug unconfined compressive strength Poisson ratio ARMA 19 1833 Geomechanical characterization of the tight sandstones of Lajas Formation, Neuquén basin, Argentina. Chiachiarelli, F.C. YPF S.A., Neuquén, Argentina Merchán, V. YPF S.A., Neuquén, Argentina Copyright 2019 ARMA...

... ABSTRACT: Deepwater wells are plugged and abandoned at the onset of uneconomic production. Moreover, strict government policies are constantly imposed on offshore operators in an effort to prevent abandoned wellbore leaks. After a well is plugged, integrity loss via fluid-driven interfacial...

... ABSTRACT: Measurements of physical properties at many length scales are often performed for subsurface engineering, including seismic, well logging, whole core, core plug, millimeter, and down to micro- and nano-scales. The integration of plug and log-scale characterization is key...

... ABSTRACT: Complete rock property characterization based on whole core acquisition helps generate reservoir specific correlations for play characterization. Conventional whole core ensures superior quality representative plugs from the specific formations of interest. Sidewall core acquisition...

... compressibility reservoir geomechanics Fluid Dynamics flow in porous media overburden stress compaction biaxial stress field perpendicular shale plug core plug pressure dependent permeability transverse flow correction factor configuration stress path boundary condition permeability gas...

... quantifying the risk of such debonding require the cement-caprock interface tensile strength as an input parameter. In this paper we present an experimental method to measure tensile strength of composite shale/cement plugs created under stress and temperature conditions similar to downhole well conditions...