METHOD FOR SEPARATION OF GAS SATURATED LAYERS IN CASED AND NON-CASED OIL-AND-GAS WELLS (VARIANTS)

摘要

The invention relates to means for geo-physical investigations of oil and gas collectors. Method for separation of gas-saturated layers in cased and non-cased oil-and-gas wells is in use of multi-probe neutron-neutron logging (NL) and multi-probe acoustic logging (). For respective layers one obtains difference between porosity by NL that is determined by ratio of readings of two probes of NL device and porosity by that is determined by interval time of propagation of long waves, with comparison of that difference to indications of any individual probe of multi-probe NL device. One determines as well porosity by with comparison of that one to indications of any individual probe of multi-probe NL device. At determination of water-saturated porosity the porosities for respective layers are compared by means of crossplot. The invention provides increase of self-descriptiveness and reliability of logging non-cased and cased with steel pipes wells.