Schlumberger Technology Corporation

Saudi Arabian Oil Company

Westerngeco L.l.p.

Westerngreco L.l.c.

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Prad Research and Development Limited

Tarek M Habashy

Dzevat Omeragic

Aria Abubakar

Lalitha Venkataramanan

David Lee Alumbaugh

Nikita Valentinovich Seleznev

Yong-Hua Chen

Ping Zhang

Terizhandur S Ramakrishnan

Smaine Zeroug

Denise E Freed

Austin Boyd

Guozhong Gao

Raj Banerjee

Sushil Shetty

Michael Thambynayagam

M Reza Taherian

Jeffrey A Beren

Badarinadh Vissapragada

Fred K Gruber

Bikash Kumar Sinha

Sandip Bose

Richard Timothy Coates

Francois M Auzerais

Douglas E Miller

Fikri John Kuchuk

Lin Liang

Frank Morrison

Kambiz A Safinya

Jeff Spath

Michael Thiel

Jianguo Liu

Ashok Belani

Chung Lung Chang

Rod W Shampine

Philip F Sullivan

John C Rasmus

Edward Nichols

Qiming Li

Andrew J Hayman

Philip S Cheung

Jeffrey Miles

Dominique Guillot

Ting Lei

Ridvan Akkurt

Richard E Lewis

Michael L Oristaglio

Erik Rylander

Keli Sun

Jiaqi Yang

Vladimir L'vovich Druskin

Mehdi Hizem

Christophe Dupuis

Andrea Zerilli

Valery Polyakov

Jiqing Xia

Reza Taherian

Jahir A Pabon

Shouxiang Mark Ma

Edward Harrigan

Jacques R Tabanou

Lawrence James Leising

Benoit Couet

Hitoshi Sugiyama

Alberto F Marsala

William John Bailey

Michael David Prange

David Linton Johnson

Hiroshi Hori

Alain M Dumont

Michael Wilt

Cengiz Esmersoy

Andrew John Carnegie

Peter Gerhard Tilke

H Frank Morrison

Andrei Davydychev

Mickael Allouche

Anthony Goodwin

Jeffrey Spath

Toshihiro Kinoshita

Philip M Singer

Sofia N Davydycheva

Steve F Crary

Carlos Maeso

Albina Mutina

Vivian Pistre

Yun Lin

Ma Luo

Vasileios-Marios Gkortsas

R K Michael Thambynayagam

Richard W Gaylor

Raphael Altman

David R Mariani

Vanessa Simoes

Hui Xie

Marwan Moufarrej

Vijaya Halabe

Michel Claverie

Atsushi Saito

The subject disclosure relates to a method for determining a volume fraction of water and water salinity in organic shales and other geological formations. The method includes a knowledge of complex formation permittivity at several frequencies and minimizes or excludes dependency on external parameters, such as the permittivity of the formation mineral phase.

Methods for determining a volume fraction of water and water salinity in organic shale reservoirs using multi-frequency dielectric well logging measurements

A method, computer program product, and computing system for receiving downhole logging data for a porous media. A pore size distribution index may be estimated based upon, at least in part, nuclear magnetic resonance data (NMR) from the downhole logging data of the porous media. A relative permeability and capillary pressure curve may be generated with a feasible region of solutions based upon, at least in part, the pore size distribution index.

System and method for reducing a feasible region of solutions in a relative permeability and capillary pressure curve

Embodiments of the present disclosure are directed towards a method for obtaining and analyzing flux leakage data. Embodiments may include measuring, using a magnetic flux leakage tool, magnetic flux leakage data from a casing and determining sensor liftoff data from the flux leakage data. Embodiments may also include performing outward analytic continuation of the magnetic flux leakage data from a sensor plane to one or more additional planes and extrapolating back from the one or more additional planes to a surface. Embodiments may include applying a model-based parametric inversion to the magnetic field flux leakage data and determining, based upon, at least in part, the model-based parametric inversion, a shape and size of a corresponding corroded area associated with the casing.

System and method for obtaining and analyzing flux leakage data in the inspection of oil and gas wells

Inversion-based workflows are provided for real-time interpretation of the electromagnetic (EM) look-around and look-ahead measurements. The profile of a look-around zone is determined by interpreting EM measurements of a look-around zone. The profile of the look-around zone characterizes formation dip as well as vertical resistivity or resistivity anisotropy of one or more formation layers of the look-around zone. The profile of a look-ahead zone is determined by interpreting EM measurements of the look-ahead zone. The profile of the look-ahead zone characterizes formation dip as well as horizontal resistivity, vertical resistivity or anisotropy of one or more formation layers of the look-ahead zone. The workflows can also involve interpretation of look-around resistivity measurements to aid in the characterization of the look-around zone.

Methods and systems employing look-around and look-ahead inversion of downhole measurements

A permeability log is generated by running borehole tools in a borehole traversing a formation, including at least electromagnetic (EM) tool providing at least a low-frequency complex conductivity measurement at least one frequency. Data from the EM tool and other data obtained from other tools are provided to a wideband EM model, where a data inversion is conducted to provide a plurality of outputs from which a cementation exponent may be calculated. The cementation exponent is used to find a formation factor at each depth of interest in the borehole, and the formation factor is used to find a permeability value which is used for the permeability log. The permeability log may be generated without the use of core data.

Permeability determinations from wideband EM models using borehole logging tools

Systems and methods are disclosed for well logging using radiation detection and/or emission of gamma rays. A method according to the disclosure includes collecting data from the subterranean formation using a nuclear density tool, wherein the nuclear density tool is configured to collect data to form an azimuthal image. The method further includes characterizing a section of the subterranean formation comprising data and images acquired in a high angle wellbore section, a horizontal wellbore section, or a combination thereof. The method additionally includes performing a parallel inversion using apparent densities and volumetric photoelectric factor images to build a formation model, wherein the parallel inversion comprises a high angle workflow that models high angle wellbore sections and a horizontal workflow that models horizontal wellbore sections.

Inversion-based workflow for consistent interpretation of nuclear density images in horizontal wells

Methods and apparatus for characterizing a subterranean formation traversed by a wellbore including collecting data from the formation using a tool wherein the tool collects data to form an azimuthal image, characterizing a section of the formation comprising data and images acquired in a high angle wellbore section or horizontal wellbore section using a parametric model, and performing an inversion using apparent densities and volumetric photoelectric factor images to build a formation model wherein the inversion is tailored for high angle wellbore sections and/or horizontal wellbore sections.

Inversion-based workflow for processing nuclear density images in high-angle and horizontal wells

A methods are provided for investigating a sample containing hydrocarbons by subjecting the sample to a nuclear magnetic resonance (NMR) sequence using NMR equipment, using the NMR equipment to detect signals from the sample in response to the NMR sequence, analyzing the signals to extract a distribution of relaxation times (or diffusions), and computing a value for a parameter of the sample as a function of at least one of the relaxation times (or diffusions), wherein the computing utilizes a correction factor that modifies the value for the parameter as a function of relaxation time for at least short relaxation times (or as a function of diffusion for at least large diffusion coefficients).

Methods of investigating formation samples using NMR data

Apparatus and method of characterizing a subterranean formation including observing a formation using nuclear magnetic resonance measurements, calculating an answer product by computing an integral transform on the indications in measurement-domain, and using answer products to estimate a property of the formation. Apparatus and a method for characterizing a subterranean formation including collecting NMR data of a formation, calculating an answer product comprising the data, wherein the calculating comprises a formula and estimating a property of the formation using the answer product.

Estimation of petrophysical and fluid properties using integral transforms in nuclear magnetic resonance

Methods for determining oil-water contact positions and water zone resistivities are provided. In one example, the method may involve performing a 1D inversion on data collected by a resistivity logging tool. Further, the method may involve scanning a resistivity profile of a reservoir generated by the 1D inversion for a boundary position below the resistivity logging tool. Furthermore, the method may involve applying a local residual weighted average on the boundary position to generate an initial estimation of an oil-water contact position and inverting the initial estimation of the oil-water contact to generate water zone resistivity and a modified oil-water contact position. Additionally, the method may involve running a smoothing local post-processing operation to generate a layered model and performing a 2D inversion on the layered model.

Workflow for navigation with respect to oil-water contact using deep directional resistivity measurements

Methods and related systems are described for estimating fluid or rock properties from NMR measurements. A modified pulse sequence is provided that can directly provide moments of relaxation-time or diffusion distributions. This pulse sequence can be adapted to the desired moment of relaxation-time or diffusion coefficient. The data from this pulse sequence provides direct estimates of fluid properties such as average chain length and viscosity of a hydrocarbon. In comparison to the uniformly-spaced pulse sequence, these pulse sequences are faster and have a lower error bar in computing the fluid properties.

Modified pulse sequence to estimate properties

Systems, methods, and apparatuses to generate a formation model are described. In one aspect, a logging system includes a transmitter to produce an electromagnetic field in a borehole, a receiver in the borehole to detect a first field signal induced by the electromagnetic field at a first depth of investigation and a second field signal induced by the electromagnetic field at a second depth of investigation, and a modeling unit to perform a first one-dimensional inversion on the first field signal and a second one-dimensional inversion on the second field signal, build a two-dimensional model from the first one-dimensional inversion and the second one-dimensional inversion, and perform a two-dimensional inversion on the two-dimensional model to generate a two-dimensional formation model.

Methods and apparatuses to generate a formation model

A method for characterizing a subterranean formation traversed by a wellbore includes generating a reservoir model using data collected from the formation, generating a perturbation object comprising a perturbation of the wellbore, integrating the perturbation object with the reservoir model, and forming a geological model wherein the perturbation object is integrated in the reservoir model.

Integrating reservoir modeling with modeling a perturbation

A method of estimating formation parameters in a directional drilling process by acquiring electromagnetic logging while drilling (LWD) measurements over a non-uniform forward modeling grid and inverting, using a pixel-based inversion method, the LWD measurements over a uniform inversion grid. The inversion algorithm may be applied using a sliding window scheme that allows the formation parameters to be estimated independently and in parallel across a plurality of overlapping windows which span the entirety of the inversion grid.

Efficiency of pixel-based inversion algorithms

A method for torsional wave logging in a borehole of a subterranean formation. The method includes obtaining a torsional wave measurement of the borehole, wherein the torsional wave measurement represents characteristics of a torsional wave propagating within a cylindrical layered structure associated with the borehole, wherein the cylindrical layered structure comprises the subterranean formation and a completion of the borehole, analyzing, by a computer processor, the torsional wave measurement to generate a quality measure of the completion, and displaying the quality measure of the completion.

Torsional wave logging

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Burlington, MA, United States of America

Tarek M Habashy