... rock type artificial intelligence geological subdiscipline co 2 algorithm hydraulic fracturing reservoir geomechanics climate change diffusivity hydraulic diffusivity plate tectonics subsurface storage north america government machine learning national energy technology laboratory...

... evaluation diffusivity figure technical conference journal technology conference Introduction Fracturing flowback has become a mature technology for the development of tight oil reservoirs. In the process of flowback and depressurization, the part of proppants in fracture inevitably will return...

... Darvish et al. (2006) conducted multiple miscible CO 2 injection experiments to study mass transfer between matrix and fracture; their results showed that molecular diffusion plays a central role and surpass the contribution from gravity drainage when CO 2 was injected at a low rate...

...Methods This section describes the conceptual model and presents the diffusion-based model for mass transport through the ultratight matrix. Conceptual model Tight (e.g., tight sands) and ultratight (e.g., shales with permeability < 200 nD) reservoirs have a high initial production...

... of the diffuse layer and the shear plane, respectively. The shear plane is a theoretical boundary between mobile and immobile portions of the diffuse layer. The TLM proposed by Leroy and Revil (2004) follows the consideration proposed by Davis, James, and Leckie (1978 ) that e -and d -planes are identical...

... model lateral length assumption correlation delaware basin operator strategic decision complex reservoir upstream oil & gas stage length pressure drop fracture equation reservoir simulation unconventional resource economics diffusivity wolfcamp enhanced frac region model society...

... coefficient heavy oil reservoir enhanced recovery SAGD concentration das diffusion coefficient production control Artificial Intelligence Upstream Oil & Gas bitumen operation production monitoring production logging solvent concentration spe annual technical conference application...

... Abstract Molecular diffusion plays a dominant role in various reservoir processes, especially in the absence of convective mixing. In general, gas diffusion in oils depend on several factors such as pressure, temperature, oil viscosity and gas-to-oil ratio (GOR). Out of these factors, GOR...

... inhibitor wax remediation wax inhibition asphaltene remediation remediation of hydrates PIB deposit mass diffusivity temperature difference concentration difference flow assurance oilfield chemistry scale inhibition deposition experiment cold finger paraffin inhibitor operating condition...

... on integral method that utilizes linear regression. In the fourth section, we present the experimental results and application of the mathematical model to analyze the experimental data and to determine the diffusivity. In the last section, we conclude with the main findings and scope of future work...

... Abstract Molecular diffusion plays a very important role in various reservoir processes; especially in the oil recovery processes where convective forces are not dominant or when direct frontal contact and mixing is not possible. For example, in heavy oil and bitumen recovery, injected light...

... conditions ( Caroll, 1991 ). The estimation of Henry's constant and diffusion coefficient requires conducting two separate experiments: one that measures solubility under phase equilibrium conditions and another that measures a property correlated to diffusivity. However, the experimental data from...

... Abstract Shale and tight gas reservoirs are characterized by very low permeabilities at the nano-scale which gives rise to non-Darcy effects such as Knudsen diffusion that makes the use of conventional (Darcy) models inadequate. Slip-flow and Knudsen diffusion have been shown to be accounted...

... the measurement and modeling of the diffusivity and interface mass transfer coefficients for those gas-liquid systems. The experimental data were obtained with accurate PVT measurements, under high pressure and high temperature conditions. The tests were carried out in the 70°C through 120°C temperature range...

... solvent concentration viscosity diffusion coefficient reservoir interface temperature spe 146671 diffusivity sor gas-liquid interface interface Introduction Steam Assisted Gravity Drainage (SAGD) Process for bitumen production (Butler 1984, 1988 , 1994 ) reduces oil viscosity by heating...

... on the significance of microscale diffusion on flow behavior over time. Pore throat diameters on the order of nanometers are known to result in non-Darcy flow conditions, which can be accounted for using the dusty-gas model coupled with various models for diffusivity estimation. This phenomenon is related...

...Statement of Theory and Mathematical Model In order to evaluate the diffusion coefficient and solubility value for each step of experiment, an appropriate mathematical model was developed such that the measured dissolution rate is theoretically related to these two parameters. In order to do...

... size Drillstem Testing hydraulic fracture compressibility outer reservoir trilinear flow model reservoir diffusivity Raghavan horizontal well matrix permeability pressure transient testing approximation natural fracture inner reservoir fracture transient dual-porosity model...

... Molecule diffusion occurs due to the concentration gradient (ordinary diffusion), the pressure gradient (pressure diffusion), the thermal gradient (thermal diffusion), unequal external forces (forced diffusion), or Brownian motion (self-diffusion) ( Bird et al., 1960 ). In a binary system...

... by a diffusion coefficient. Consequently the measurement of the diffusion coefficient is extremely important. This, however, presents a significant amount of challenges in the laboratory and in the data analysis, mainly because of the viscous and opaque nature of the heavy oil and the dependence on concentration...