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Neutron quartz and dolomite parameters as a function of The neutron matrix value calculation is also encoded in the Parameter Calculator. However, the Schlumberger Log Interpretation Principles book directly references the original Simandoux paper as the basis of the equaiton, and also the paper by Poupon et al4 in as the development of the model.

## DUG Insight User Manual

The gamma ray tool responds to orthoclase, but you are already counting on the gamma ray for the illite. That is, they have had the effects of the borehole contents and geometry removed. Quartz is silicon dioxide and nothing else. Do not try to trim the list too much gdoframe this point.

Borehole Temperature Index Q Temperature plays an important part in salinity computations. Keep in mind, though, that referring to a volume in a response equation signi?

Do not try to combine special? They are particularly convenient to use when the input uncertainties are obtained from uncertainty curves. They are a means of adding local knowledge to the model through equations. All solid formation components and two particular? The hydrogen index of a manuzl can be computed as a function of geofgame hydrogen density, as discussed in Schlumberger Interpretation Principles.

First, the square root makes the variation with water volume closer to linear, resulting in a more numerically georfame and faster equation for the nonlinear solver. All response parameters can be zoned.

No part of this manual may be reproduced, stored in a retrieval system, or translated in any form or by any means, electronic or mechanical, including photocopying and recording, without the prior written permission of Schlumberger.

For example, rather than leaving the NPHI equation unassigned, you might write the model as in Table Using a density of 2.

Figure 13 shows the result in the clay section where there was bad hole. It is like assigning equal trust to each point, but often we know that some points are more reliable than others. How do I change Insight’s default directory? That is, they take on a single value throughout the processing interval. What should I do? Tool uncertainty can be illustrated with the induction and density tools.

Although the program has over parameters, you will use only a small subset for any given model. Temperature corrections geeoframe made under the following conditions: As stated before, solution of the inverse problem is often considered the main job of the ELANPlus program.

Borehole Pressure Borehole pressure is used in the computation of certain salinity-dependent parameter values. Response equations are the equations to be solved and their associated input data and uncertainties.

Because of their well-de? In general, you should not modify the response parameter for quartz, calcite, dolomite, or any water. The product BQV in Equation 54 is the conductivity of the clay counterions. How to estimate seismic bandwidth using spectral decomposition? A value of 1. Assume that the temperature is 60 C. Two advantages arise from taking the square roots.

For a given situation the correct uncertainties often require a subjective decision by the user. Borehole pressure in psi is assumed to be 0. Fluid parameters are dependent on hydrocarbon type and water salinity. How to calibrate interface PDFs to seismic amplitudes using crossplots How can I created a layered result from many different input volumes merged at horizons?

The counterion charge per unit pore space is defined as Qv.

### AboutHydrology: Material for the Winter School on the GEOframe System – Installations

For example, you might constrain the results to match results known from some other source, such as teoframe analyses. These new response and environmental corrections also are encoded in the current environmental correction program although the output is still called NPHI.

Translation of parameters from the Waxman-Smits to the Dual Water model and the reverse are supported in the Parameter Calculator.

Figure 8 is a plot of DT versus porosity for dolomite, calcite, and quartz. It requires a curve from an environmental correction program, to which all corrections except salinity have been applied.

The response parameters used to generate the Figure 8 plot were assigned the following values: