Isotope capsule for well logging

Abstract

The invention discloses an isotope capsule for well logging. The isotope capsule comprises a capsule body, an isotope solid tracer, a capsule cover and an additive; the capsule body and the capsule cover are connected to form a capsule; the isotope solid tracer and the additive are both located in a cavity in the capsule; and the additive comprises a bitter agent and an odor agent. Isotope solid tracer powder is fixedly arranged in a closed space by adopting a capsule shell, so that the controllability of an isotope is improved, the pollution channel is controlled from the source of the isotope, and secondary pollution does not exist in the whole process of delivery, transportation, split charging and use; the dosage of the isotope solid tracer in the capsule shell is determined accordingto the minimum dosage of production well injection profile logging, after capsule isotope manufacturing is completed, the secondary split charging link is avoided in the distributing and assembling process, the timeliness of the assembling and using link is improved, an operator can carry out on-site reassembling after the isotope attenuation phenomenon occurs, and the production efficiency is improved, and operation is safer, more efficient, simpler and more convenient, and personal injuries are avoided.

Description

technical field [0001] The invention belongs to the field of petroleum well logging and relates to an isotope capsule for well logging. Background technique [0002] Isotope logging is also called radioactive tracer logging (ra-dioactive tracer logging). In drilling, radioactive isotopes are used as tracer atoms to achieve a complete set of methods such as dividing permeable formations, studying groundwater movement characteristics and oil layer dynamics, checking drilling technology and hydraulic fracturing effects, collectively referred to as radioisotope logging. With the development of the atomic energy industry, the types of radioisotopes that can be used in well logging are increasing, and the scope of application is also expanding. [0003] At present, the isotope solid tracer used in the injection profile construction in the process of isotope logging is in the form of powder after leaving the factory, and there are open operations in various links such as transport...

AI Technical Summary

Problems solved by technology

[0003] At present, the isotope solid tracer used in the injection profile construction in the process of isotope logging is in the form of powder after leaving the factory, and there are open operations in various links such as transportation, configuration, and construction site, which can easily cause radioactive dust to float and pollute the environment. and construction workers have brought a great hidden danger of radioactive pollution

Due to the limitations of the above-mentioned problems in the injection profile of conventional processes, there are large uncertainties in the secondary packaging and preparation of isotope solid tracers, construction dose control, and isotope risk control.

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