Error control and loss functions for the deep learning inversion of borehole resistivity measurements

M Shahriari, D Pardo, JA Rivera… - International Journal …, 2021 - Wiley Online Library
Deep learning (DL) is a numerical method that approximates functions. Recently, its use has
become attractive for the simulation and inversion of multiple problems in computational …

A new method for predicting formation lithology while drilling at horizontal well bit

J Sun, M Chen, Q Li, L Ren, M Dou, J Zhang - Journal of Petroleum Science …, 2021 - Elsevier
Highlights•A new method for real-time prediction of measurement point and vertical reservoir
boundary distance (D-MP-VRB) while drilling is proposed. Real-time prediction models for D …

Optimization of well trajectory under uncertainty for proactive geosteering

Y Chen, RJ Lorentzen, EH Vefring - SPE Journal, 2015 - onepetro.org
Various logging-while-drilling (LWD) and seismic-while-drilling (SWD) tools offer
opportunities to obtain geological information near the bottomhole assembly during the …

An ensemble-based framework for proactive geosteering

X Luo, P Eliasson, S Alyaev, A Romdhane… - SPWLA Annual …, 2015 - onepetro.org
Proactive geosteering workflows include a number of steps that are repeated as the drilling
operation progresses. First, various measurements such as gamma ray, gravity or …

A deep learning approach to design a borehole instrument for geosteering

M Shahriari, A Hazra, D Pardo - Geophysics, 2022 - library.seg.org
Deep neural network (DNN)-based methods are suitable for the rapid inversion of borehole
resistivity measurements. They approximate the forward and the inverse problem offline …

Physics-driven Deep Learning Pixel-Based Inversion of Logging-While-Drilling in Anisotropic Formation

N Zhao, N Li, Z Xiao, X Wang… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
The inversion of logging-while-drilling (LWD) measurements using deep learning (DL)(data-
driven approach) is a rapidly growing topic of interest in well geosteering. DL inversion …

Borehole resistivity simulations of oil-water transition zones with a 1.5 D numerical solver

M Shahriari, D Pardo - Computational Geosciences, 2020 - Springer
When simulating borehole resistivity measurements in a reservoir, it is common to consider
an oil-water contact (OWC) planar interface. However, this consideration can lead to an …

Determination and display of apparent resistivity of downhole transient electromagnetic data

F Le, GB Itskovich, SA Morris, SM Dutta - US Patent 9,551,806, 2017 - Google Patents
Abstract Systems, devices, and methods for evaluating an earth formation. Methods may
include inducing a current in the formation; measuring a time-dependent transient …

Extended LWD High Resolution Imaging Solution for Well Placement and Reservoir Characterization in laterally Heterogeneous Carbonate Reservoirs

ML Zeghlache, MF Zayer, R Khandakji - SPE Kingdom of Saudi Arabia …, 2016 - onepetro.org
Abstract Logging-while-drilling (LWD) imaging solutions have been a part of the oil and gas
formation evaluation technologies portfolio for quite some time. Lately, most LWD solutions …

Reservoir Characterization, Fracture Mapping, and Well Placement Using a Suite of Logging-While-Drilling Images with Multiple Resolutions in a Marginal, Middle …

K Al Daghar, T Ihab, R Sayed, A Abdelaal… - SPE Reservoir …, 2011 - onepetro.org
In a low-permeability Middle East carbonate reservoir, geologists, petrophysicists, and
reservoir and drilling engineers had multiple requirements to optimally place the well …