... ABSTRACT: Carbon dioxide (CO 2 ) sequestration in depleted oil and gas reservoirs is a key technology to mitigate anthropogenic CO 2 emissions. In this study, we experimentally investigate the impact of biogeomechanical alteration on CO 2 storage in a hydrocarbon-depleted carbonate reservoir...

... ABSTRACT: Unconventional Shale reservoirs, with typically ultra-low permeabilities, have been a major focus of hydrocarbon production over the past few decades. In this paper, we investigated the effect of biogeomechanical altered near-wellbore properties on hydrocarbon recovery from tight...

... in the Wolfcamp shale formation. Our results indicated that in depleted Wolfcamp shale reservoirs, microbially-altered properties could decrease the porosity, and enhance long-term caprock integrity and the security of stored CO 2 . 1 Introduction Biogeomechanics is the scientific study of how biological...

... and hardness. A two-term exponential relationship was observed between the hardness and the plastic work induced in the nanoindentation process. For the tested Marcellus shale, the mechanical weakening was not apparent after 10 days water treatment due to the short time of treatment. Mechanical alteration...

... and geometry. Significant differences between the matrix-types of the 3 units are explained by their mineral compositions and differential grain size, which is controlled by their different alterations (potassic, sericitic, and sausseritic). Reservoir Characterization extensometer vein-type sample...

..., collection of standard parameters such as rock quality designation and fracture frequency, and field estimation of intact rock strength. The effects of geotechnical biases resulting from drill core versus drift data collection are also compared. The effects of the mineralogical alteration assemblages on rock...

...1. INTRODUCTION The problems of granite erosion alteration in geotechnical construction are very common, and are widely distributed around the world (Shi, 1991; Shoji and Hidekazu, 2009; Giménez et al., 2013). The altered granites are formed by hydrothermal metasomatism of the late intruded granite...

... operation drilling practice optimization surge drilling fluid Wellbore Design wellbore instability southern iraq bottom hole pressure shale swab pressure density reduction alteration diameter reduction fluid density drilling fluid reduction 1. INTRODUCTION The downhole pressure...

... ABSTRACT: Carbon sequestration involves injecting large amounts of CO 2 into the subsurface. Dissolved CO 2 in saline aquifers can chemically alter the mineralogy of reservoir rocks and caprocks. This alteration may greatly influence mechanical properties such as shear strength, slip...

... of the causes and controls of the deformation, which were poorly understood. It was hypothesized that the hydrothermally altered materials hosting the orebodies form controls on ground behavior because they affect the mechanical properties of the rock mass. To investigate this hypothesis, 3-D material domains...

... that we encountered during the experiment was birefringence of fiber optic glass under stress, which leads to an ambiguity in strain measurements. 2. PRINCIPLE OF FBG SENSORS Fiber Bragg alteration FBG sensor sensor spectrum Upstream Oil & Gas wavelength Reservoir Characterization...

... ABSTRACT: The external and internal alterations may affect the wellbore cement stability throughout the setting period. These alterations generate micro/macro fractures in the cement matrix. Such situation, known as Sustained Casing Pressure (SCP), may result in creating pathways for any...

... ABSTRACT: Where supercritical CO 2 is injected into aquifers, the subsequent dissolution of CO 2 into the brine may result in substantial reaction and chemical transformation of the minerals comprising the reservoir and caprock and disturb the stress field, and alter the permeability...

... ABSTRACT: CO 2 geological sequestration can help mitigate greenhouse gas emissions to the atmosphere. The injection of CO 2 can alter mechanical properties of the host geological formation due to the interaction between CO 2 , resident fluid in the pores, and rock minerals. However...

... Abstract: The mechanical response of the target formations during Carbon geological storage strongly depends to the fluid pore pressure alterations in the formation. The storage formations must have sufficient capacity and could avoid migration of CO2 to the surface. When the highly...

... Abstract: During CO 2 sequestration, petrophysical and geomechanical alteration of host formations can occur due to mineral dissolution and precipitation. At the core scale, laboratory tests have shown that sandstone or siltstone can be weakened through either naturally or artificially CO 2...

... Abstract: In Carlin Style gold deposits challenging ground conditions can be correlated to the alteration type and intensity as well as ground disturbance (i.e. faulting or collapse breccias). In these conditions, there are significant limitations in the application of conventional rock mass...

... diorite alteration discontinuity geological combination breccia assessment gypsum anhydrite database rock mass model upstream oil & gas quartz-sericite alteration 1. BACKGROUND Toquepala is a large open pit copper mine owned and operated by Southern Copper Corporation. It is located...

... Abstract Fracture mechanical tests on samples collected from the Crystal Geyser field site, Utah indicate that sandstones naturally bleached by Co 2 -rich fluids have significantly lower fracture toughness values than adjacent, unaltered sandstones whereas altered and unaltered caprock...

... Abstract: In this study we present a computational model that couples two previously developed codes to calculate the combined influence of mechanical deformation and chemical alteration of fractures subject to constant normal stress and reactive fluid. Micro-scale roughness of the fracture...