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Keywords: approximation
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Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-204267-STU
... positions of the reflecting interfaces. In this paper, I consider the approximation of seismic-wave traveltimes. The simplest approximation problem is linear regression, but artificial neural network (ANN) is nonlinear regression. The nonlinearity is provided by using nonlinear function (activation...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201451-MS
... shale gas fracture mechanics hydraulic fracturing engineering scratch test degradation function reservoir geomechanics upstream oil & gas approximation information energy release rate indentation depth scratch path toughness rock fracture toughness reservoir characterization...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201281-MS
... Most of the time and even for complex reservoir types and shapes, the 2D approximation of the structure is adequate (i.e. it is possible to find one direction along which the reservoir exhibits little change) and the 2D inversions can accurately map the reservoir. However, if the resistivity...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201380-MS
... properties of minerals, and pore structure on variations in effective elastic properties of rock components. For instance, the deformation of clay minerals dispersed in between the quartz minerals was approximately 60% less than that in clay minerals colonized next to the quartz under the same load. In the...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201254-MS
... process we utilize a trained Deep Recurrent Neural Network (RNN) to approximate the reservoir simulator flows, which are subsequently used to compute the economic performance of a drilling policy through its discounted cash flows. The RNN is trained and tested on a set of reservoir simulator runs over...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-199782-STU
... production logging approximation production control Upstream Oil & Gas slug flow Reservoir Surveillance critical characteristic data analytic software gas rate pressure loss MMscf WGR software critical rate Engineer characteristic production monitoring wellbore modeling...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-195947-MS
...-dependent permeability coefficients. A perturbation technique is applied to mathematically treat the described nonlinearity to solve for the coupled equations of pore fluid flow and rock stress under steady-state flow. The good match between the obtained analytical approximations for productivity index and...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–26, 2018
Paper Number: SPE-191516-MS
... obtained from other approaches. Multiple local maximum-a-posteriori (MAP) estimates are located with the local-search DGN optimization method. A GMM is constructed to approximate the posterior probability density function, by fitting simulation results generated during the DGN minimization process. The...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 9–11, 2017
Paper Number: SPE-187455-MS
... that the outer string in a dual-string system tends to withstand more moments because of greater stiffness. Proper application of this new dual-string buckling model design can help reduce costs. Artificial Intelligence approximation length change potential energy Upstream Oil & Gas...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 26–28, 2016
Paper Number: SPE-181662-MS
... phase rates, as well as pressure and saturation distributions across the system is studied. reservoir simulation flow in porous media drillstem/well testing compressibility outer boundary Drillstem Testing Fluid Dynamics approximation Artificial Intelligence multiphase flow anomalous...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 26–28, 2016
Paper Number: SPE-181611-MS
... production data. A novel approach is proposed to generate approximate conditional realizations using the distributed Gauss-Newton (DGN) method together with a multiple local Gaussian approximation technique. Results are compared with those obtained from other approaches such as Randomized Maximum Likelihood...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 28–30, 2015
Paper Number: SPE-178748-STU
.... Upstream Oil & Gas Thomsen practical application characteristic modeling effective medium theory mathematical model Reservoir Characterization approximation tensor Applicability effective elastic property aspect ratio Artificial Intelligence comparison body porous rock porosity elastic...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 27–29, 2014
Paper Number: SPE-170741-MS
... full-order state solution such as pressure and saturation, evaluate the full-order nonlinear term before projecting it onto a reduced subspace. Therefore, we developed a reduced-order reservoir model based on a discrete empirical interpolation method (DEIM) to approximate nonlinear phase potential...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 27–29, 2014
Paper Number: SPE-170587-MS
... and to help us capture the upside potential or mitigate the downside effects for a chemical EOR process. The method is a stochastic approximate dynamic programming approach to decision making. It is based on a forward simulation coupled with a recursive algorithm which produces the near-optimal policy...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2013
Paper Number: SPE-166377-MS
... production data prediction analysis for unconventional assets. reservoir surveillance upstream oil & gas production monitoring reservoir simulation approximation desorption effect density approximation apparent gas permeability shale gas compressibility isotherm gas-slippage factor sol...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 8–10, 2012
Paper Number: SPE-159568-MS
... may result in significant error. The new method enables petroleum engineers to calculate the average reservoir pressure accurately for every reservoir type by integrating transient, production, and static data. Our technique calculates a robust approximation of the drainage area based on the...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 8–10, 2012
Paper Number: SPE-159734-MS
..., such as piece-wise linear approximations, is an algorithmic issue; not a fundamental defect. Specifically, an adequate algorithm to transform the piecewise-continuous sampled data into the Laplace space and an appropriate numerical Laplace inversion algorithm capable of processing the exponential...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 8–10, 2012
Paper Number: SPE-165588-STU
... Bingham fluids in plane Couette-Poiseuille flow is studied. We present a set of analytically flow equations for flow between parallel plates/slots in a most compact form, and use this set as a basis for developing simpler flow equations. The new equations approximate the full analytical solution over a...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 8–10, 2012
Paper Number: SPE-159154-MS
... elastic energy and a surface energy proportional to the length of the cracks in 2D or their area in 3D. artificial intelligence approximation numerical simulation complex reservoir criterion crack geometry upstream oil & gas simulation francfort expression hydraulic fracturing...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 30–November 2, 2011
Paper Number: SPE-146862-MS
... for modeling of natural and industrial processes, such as development of natural hydrocarbon resources, including gas-hydrates, CO2 injection into hydrocarbon reservoirs and saline aquifers, and for modeling of thermal processes. In this framework I use a Fully Implicit (FI) time approximation with...

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