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Also, the response equations and their associated data are used as tools to produce the desired results. By no means is this the only way to go about building models, and not every well will lend itself to it.
The ELANPlus program must know the borehole temperature to compute proper salinity and parameter values. An even better way to apply the salinity correction is to use a measured sigma, because sigma is a direct measurement of the salinity and absorber effects that perturb the neutron. Version and Program History Version 4. For more information, see Insight and Petrel Overview. Wet and Dry Clay Fundamental in understanding ELANPlus response equations is a knowledge of how clay is handled and the concept of wet versus dry clay.
How do I change Insight’s default directory?
How to get interpretation into Petrel | Frequently Asked Questions | DUG Insight User Manual
The bound water from each clay is summed into the XBWA curve. Salinity corrections are part of the final solution.
For more information see Chapter 5, Uncertainties. The presence of clay in a shaly sand environment causes the neutron-density to respond in a manner opposite that of gas. They are a means of adding local knowledge to the model through equations. The only problem is that a usable sigma is seldom available.
When a zone boundary is created for one response parameter, it will exist for all response parameters. Step 8 Set Parameter Values Parameters come in four types: Mnemonics will be explained when? The ELANPlus program will warn you that the tools are inconsistent in this case by showing a reconstructed conductivity that does not match the measured conductivity. It is generally impossible to draw a straight line through the data when more points are added, though, especially in any system where the measurements points may include some noise.
It also shows the values used to derive the uncertainties.
Singe-well ELANPlus can be run anytime after preliminary data editing such as patching, depth matching, environmental geoftame is complete. How do I decimate an interpolated surface back to its original picked lines?
Matrices Matrices are represented by upper case, bold characters, such as R.
Gekframe may want to use the UNIX lpq command to check the printing status. Actually, all formation evaluation problems are vastly underdetermined. To do that, assume a ratio of quartz to quartzplus-orthoclase; call it K. A weighted combination of all of the models, based on probabilities that were computed externally to the ELANPlus program If you use internally computed probabilities for any model combination interval, you need to select or create probability expressions to be used.
Keep in mind, though, that referring to a volume in a response equation signi?
The interpretation model could be made more sophisticated by determining an orthoclase ratio for the sands and shales and defining different Constant Tools for each model. The preceding equation assumes a similar porosity in the sands and the shales.
How can I see who is using the floating licences? Most tools are more sensitive to one formation component, or group of components, than others.
DUG Insight User Manual
They are gepframe later in this section for each water saturation equation, in their hierarchical order. It can be thought of as a volume of bound water per counterion charge. In reservoirs that contain dolomite, the addition of PHIT can be very geoframd. Certainly not the neutron. This assumption is explicitly added as an equation along with the other tools whenever a model includes both?
Even though there are enough response equations to solve for the number of formation components, which tool would be responsible for the orthoclase?
Select logs mznual are sensitive to at least one of the formation components you have selected. How do I export a time-slice as an X, Y, Amplitude map? To use the Nigerian equation you must manually change them to 1. It is special in that it is the only model that allows for the concept of conductive minerals that are nonclay minerals.