Tracer-related traffic logging method

A related flow and tracer technology, which is applied in the direction of mining fluids, measuring devices, geophysical measurements, etc., can solve the problems of undetectable radiation intensity data, unusable data, errors, etc., achieve high measurement accuracy, easy to find, improve The effect of measurement accuracy

Inactive Publication Date: 2016-05-11
北京石大开元石油技术有限公司
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AI Technical Summary

Problems solved by technology

As a result, the radiation intensity data cannot be measured beyond the detection range of the gamma measuring instrument. The measured data is affected by the horizontal distance between it and the instrument, resulting in serious errors, so that the data cannot be used

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Embodiment Construction

[0025] Embodiments of the present invention are described below with reference to the drawings.

[0026] Measuring principle: The released tracer is uniformly mixed with the liquid (water, polymer or ternary fluid) injected into the well and flows together with them at the same flow rate. The flow direction and flow rate of the test tracer can be tracked by using the gamma detector, so as to obtain the flow rate of the injected liquid. The liquid injected into the well is injected through a water distributor (faucet). After the tracer is released, it will spread out from the nozzle together with the injected liquid, so that at a certain moment, a tracer peak will be formed with the nozzle as the center, and the tracer peaks will be located at different times. Different, keep away from the water spout as time goes on. When the gamma detector traces the diffusion front of the tracer, the measured gamma curve shows a tracer peak (shown as a pulse of radioactivity). By repeatin...

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Abstract

The invention discloses a tracer-related traffic logging method. The tracer-related traffic logging method includes the following steps that tracers are released above a water distributor; when the tracers enter liquid injected from the water distributor to a well, tracing peaks are repeatedly traced up and down through a gamma detector to continuously measure the depth positions of the tracing peaks at different moments; when the gamma detector moves upwards and the tracing peaks are measured, the gamma detector returns downwards, and when the gamma detector moves downwards and the tracing peaks are measured, the gamma detector returns upwards till the radiation conditions detected by the gamma detector are not changed along with time any more. The tracer-related traffic logging method is a continuous measuring method, and has high measuring accuracy and the low measuring lower limit, and the water sucking capacity of all small layers can be accurately measured; the tracer-related traffic logging method has the obvious advantages for a well with the low injection volume, logging time is shortened, logging cost is reduced, and the influences of large pore paths, deep penetrating holes, contamination, channeling and leakage can be further avoided.

Description

technical field [0001] The invention relates to the field of oilfield development, in particular to the measurement of the water absorption of each water absorption layer in a stratified injection well. Background technique [0002] In the development process of oilfields, more than 90% of them use the difference in specific gravity between the injectant and the oil, and through water injection, gas injection, polymer injection and other processes, the oil liquid is floated up to facilitate extraction and realize oil production. In multi-layer oilfields exploited at the same time, the understanding of the water absorption of each layer of the injection well is an important data for reservoir experts to grasp the development dynamics. There are more than 30,000 injection wells in China's onshore oilfields, and the injection wells are based on water injection. Master, so the present invention is described with water injection as an example. According to the technical requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/053E21B43/14G01V5/12
CPCE21B43/14E21B47/053G01V5/12
Inventor 任志刚张勇
Owner 北京石大开元石油技术有限公司
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