PINS-43 (PINK-43K)

Multipurpose tool is designed to record return shock profile and to determine residual oil saturation during field management and well workover.

Designed to carry out downhole logging using the method of pulsed neutron-neutron logging of thermal neutrons with simultaneous monitoring and recording fluid influx.

Designed to explore cased oil- and gas-wells through tubing.

Active tasks:

• determination of residual oil saturation;
• determination of shock return profile;
• determination of behind-the-casing flow;
• determination of current oil saturation at formation water salinity over 50 g/l;
• determination of gas-liquid contact;
• monitoring over frac job fracture penetration when using marked propant agent;
• lithologic sectional layering.

Combination of flowmetry methods and pulsed neutron logging method in the proposed geophysical tool will allow oil and gas wells to be explored more efficiently and with less labor efforts, simultaneous monitoring field management and well workover.

Tool comprises of:
– pulsed neutron logging module (double-probe 2INNK+GK+LM (2ИННК +ГК+ЛМ));
Detector units – helium counter tubes (He-3). On the distant probe a HP helium counter tube is used to increase accuracy of performed measurements. Pulsed neutron generator ING-10-50-120 (ИНГ-10-50-120) or similar with neutron output up to 1×10⁸ neutrons/sec is used as neutron source with energy of 14 MeV.
Equipped with gamma-ray logging channel to measure natural radioactivity of geological materials and with collar locator to measure boring casing integrity and/or tubing.
– flowmetry module (temperature, pressure, water cut percent, thermoconductive flowmeter);
– flow meter modules (non-packer, liquid or gas);
– continuous mud resistivity module.

Example