High-temperature cable direct reading five-parameter logging instrument

Abstract

The invention relates to a high-temperature cable direct reading five-parameter logging instrument for thermal recovery of heavy oil and dynamic tests of high-temperature wells, which comprises a shell of the logging instrument, an upper connector of the logging instrument, a heat absorber, a natural gamma circuit, a road data acquisition circuit, a magnetism positioning circuit, a pressure sensor, a heat resistance guiding section, a temperature sensor, a flow sensor, a centralizer, a ground control system, a high-temperature cable and a high-temperature cable head, wherein the electronic components, the pressure sensor and the like of the logging instrument are arranged in a high-temperature metallic insulating shell; the natural gamma circuit, the road data acquisition circuit, the magnetism positioning circuit and the pressure sensor are in circuit connection to acquire data of natural gamma, magnetism positioning, pressure, temperature and flow; the heat absorber generates heat at two ends of the natural gamma circuit, the road data acquisition circuit, the magnetism positioning circuit and the pressure sensor; and the heat resistance guiding section is used for carrying out heat insulation and pressure conduction to transfer signals generated by each component to the ground control system. The logging instrument solves the problem that logging liquid and cables can be damaged easily at high temperature in the prior art, and the logging instrument can be used for thermal recovery of heavy oil and dynamic tests of high-temperature wells.

Description

Technical field: [0001] The invention relates to a high-temperature cable direct-reading five-parameter logging instrument for thermal exploitation of heavy oil and dynamic testing of high-temperature wells Background technique: [0002] The dynamic monitoring of steam injection thermal recovery of heavy oil often causes great difficulties in the selection of logging items due to the uncertain factors of the downhole conditions of the test wells. When the temperature of the test well is higher than the temperature resistance index of conventional logging tools and cables, the logging tools and cables are often damaged, resulting in unnecessary economic losses. The high-temperature storage logging tool is used for testing, and it is impossible to monitor the changes of various parameters in the well in real time, and the specific depth and temperature of the lowering of the downhole tool cannot be determined, so that the working time and status of the downhole tool in the hig...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature cable direct reading five-parameter logging tool, which solves the great difficulty in the selection of logging items caused by conventional logging tools in the prior art. When the temperature resistance index of the conventional logging tool and the cable is used, the logging tool and the cable will be damaged, resulting in economic losses; the high-temperature storage logging tool cannot monitor the changes of various parameters in the well in real time, and the high-temperature storage logging tool can only Working at high temperature for no more than 4 hours, and unable to monitor in real time, unable to determine the specific temperature and depth of the logging tool lowered, unable to determine the working time and status of the high temperature section

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