Results 221 to 230 of about 3,287,588 (278)

Ambiguity analysis of well‐log data

GEOPHYSICS, 1994
Ambiguity in a geophysical interpretation problem is the possibility of accepting more than one solution caused either by solution nonuniqueness or instability. Nonuniqueness is related to the existence of more than one solution regardless of the precision of observations.
Alvaro Bueno Buoro, João B. C. Silva
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Reservoir Analysis by Well Log Data

Energy Sources, 2005
The aim of this research is to describe and characterize the reservoir sections by well log data. Well logs are used to examine the porosity, water saturation and true resistivity properties of the reservoir. Throughout the project, the data is processed using geostatistical tests that are frequency, histograms, auto-correlation, cross-correlations ...
MUSTAFA VERSAN KOK, BAHADIR GOKCAL, GIZEM ERSOY   +2 more
openaire   +1 more source

Permeability Determination From Well Log Data

SPE Formation Evaluation, 1997
Summary We discuss and compare three different approaches for permeability determination from logs from a practical point of view. The three methods, empirical, statistical, and the recently introduced "virtual measurement," make use of empirically determined models, multiple variable regression, and artificial neural networks ...
Shahab Mohaghegh, Bogdan Balan, Samuel Ameri   +2 more
openaire   +1 more source

3D data volumes from well logs

SEG Technical Program Expanded Abstracts 2007, 2007
One of the perennial problems in exploration is putting well information into a form where it can be easily related to seismic data. This paper describes a technique for generating data volumes of rock properties in SEG Y format from well logs. These volumes are compatible with all standard seismic interpretation systems, and can be used by the ...
L. R. Denham, H. Roice Nelson
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Reservoir Delineation With VSP and Well Log Data

Proceedings of Middle East Oil Show, 1987
ABSTRACT A prospective Mishrif reef defined by surface seismic data was drilled, but the predicted porosity was not encountered. Acquisition and study of vertical seismic profile (VSP) data including complex trace attribute processing and waveform modelling, indicated that higher reefal porosity was developed farther updip.
D. L. Rodrick, C. K. Poster
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Quantative Interpretation Of Seismic Data Using Well Logs

SPE Annual Fall Technical Conference and Exhibition, 1978
Abstract Seismic and petrophysical data sets are processed to acoustic impedance. The petrophysical processing is divided into three phases. The first involves the preparation of a depth-sampled acoustic-impedance log corrected for environmental effects.
E.C.A. Gevers, S.W. Watson
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Nonlinear estimation of missing logs from existing well log data

SEG Technical Program Expanded Abstracts 2001, 2001
Estimation of petrophysical properties of rocks from well log data plays a very important role in reservoir characterization and simulation. However, it is very common for petrophysicists to face the problem that well log data sets are not available or complete.
Rafael Banchs, Juan R. Jiménez, Edgar Del Pino   +2 more
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Neural Network Interpretation Of Em39 Well Log Data

10th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1997
We used a Modular Neural Network(MNN) to invert well logging curves from a Geonics EM39 induction logger In the interpretation scheme, there are several subsets of networks that depend on the relative resistivities of adjacent layers, e.g. Rl>R2, Rl R3, etc.
Lin Zhang, Mary M. Poulton
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Synthesis of Seismograms from Well Log Data

The Journal of the Acoustical Society of America, 1955
Under certain highly simplified but realistic physical assumptions, the basic data from continuous velocity surveys in wells can be made to simulate the variations in acoustic impedance in the ground which give rise to seismic reflections. An electro-optical analog device is described which makes use of the basic well data to produce synthetic seismic ...
C. A. Swartz, R. A. Peterson, R. W. Fillippone   +2 more
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Permeability Determination from Well Logs and Core Data

Permian Basin Oil and Gas Recovery Conference, 1994
ABSTRACT This paper discusses a methodology for accurately estimating permeability from well log devices, with commonly available core and log data. Core permeability and porosity data are used to identify three or four different hydraulic zones (HZ's) with unique pore structures.
openaire   +1 more source