ACPR resistivity gamma logging tool while drilling

Array compensated propagation resistivity tool which can measure formation resistivity and natural gamma ray simultaneously in real time, is of great application significance in reservoir evaluation and real-time geo-steering drilling accurately.

It integrates the resistivity and natural gamma measurement together, with compact structure, reliable and robust performance

Feature with double-frequency, dual source, coil system of symmetrical structure, with multiple probing depths and high longitudinal resolution

Double-frequency, dual-Spacing, symmetrical coil system, with multiple investigation Depth, high vertical resolution

Adopt symmetrical measurement mode, reduce the impact of changes in environmental factors on measurement effectively

Adopt symmetrical measurement mode, reduce the impact of environmental factors effectively.

The measuring circuit is featured with low power consumption, and high reliability;

The measuring system is equipped with automatic temperature drift correction function;

Equip with automatic correction software for borehole effect and complete interpretation, correction chart, with accurate and reliable results;

Equipped with automatic correction software for borehole effect and complete interpretation, correction charts, leads to accurate and reliable results;

The instrument has been tested and experimented strictly, with correct response, stable and reliable.

Resistivity measurement

2-MHz phase shift

0.1～2000(ohm-m)
±0.6%(0.1～50 ohm-m)
±0.3 mS/m(higher than 50 ohm-m)

2-MHz attenuation

0.1～500(ohm-m)
±0.8%(0.1～25 ohm-m)
±0.45 mS/m(higher than 25 ohm-m)

400-kHz phase shift

0.1～1000(ohm-m)
±1.35%(0.1～25 ohm-m)
±0.5 mS/m(higher than 25 ohm-m)

400-kHz attenuation

0.1～200(ohm-m)
±2%(0.1～10 ohm-m)
±6 mS/m(higher than 10 ohm-m)

Natural gamma measurement

Range:0～500(API)
Measurement accuracy

Accuracy: ±3 API @ 100 API

Vertical Resolution:172 mm(6.8″)

Working environment

Max. working temperature:150 ℃
Max. working pressure: 20000 psi
Max. drilling rate (ROP):

54 m/hr(5 s/per sample)
108 m/hr(2.5 s/per sample)

Tool OD:

6.75″
8.00″