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Laboratory work №3

RELEASE THE RESERVOIR ROCKS AND DETERMING
K P AND K OG ACCORDING TO GEOPHYSICAL WELL
LOGGING

3.1 Purpose of work

An overview with the method selection reservoir rocks,
determination K p and K og according to geophysical well logging
(GWL) and acquire practical skills in solving these problems.

3.2 The theoretical material

Allocated reservoir rocks according to GWL - is one of the
most important tasks, but at the same time and difficult, especially
when dealing with a complicated structure collectors. Solution of
this problem is based on the fact that the reservoir properties and
nature of the fluid that is in the pores of the reservoir, affecting on
screenings of geophysical parameters. Thus, we obtain geophysical
characteristics for different types of collectors, which allow
solving the inverse problem. The more geophysical information is
about cross-section of wells, the more confident you can make a
selection of collectors.
Below is limited characteristic of reservoir by using
geophysical methods: IR, SPL, GL, NGL, dс:
1. IR - the availability of increase electrical resistance by
ML
micro data logging (Δρ ≠0), three-layer curve of LL;
2. SPL - the presence of anomalies (usually);
3. GL (Iγ) - small values of Iγ = (2~8) mR / hr. (excluding
cases of polymictic sandstone for which Iγ can make a big value);
4. NGK (Inγ) - average, meaning Inγ = (1.2~1.4) c.un.;

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