Well logging method capable of storing relative flow rate

Abstract

The invention discloses a well logging method capable of storing the relative flow rate. The well logging method comprises the following steps that the working time of an instrument and the releasing time of a tracer agent are set according to existing data of a to-be-logged well; an assembled flow instrument is descended into the well through an anti-spraying unit special for a steel wire; a standard curve is measured according to basic data of the well, after being released, the tracer agent is continuously traced according to the data of the well, and detected curve data are recorded through the flow instrument till the working time is over; the flow instrument is got back to the ground, the data recorded in the instrument are read, and then the data and depth data in a depth recorder are combined through the time, the trend of the depth is judged in the combining process, and a plurality of lifting curves and a plurality of lowering curves are obtained; and datum treatment is conducted, depth-correcting calculation is conducted firstly, and then the flow rate of the current depth can be calculated by calculating the lifting curves. According to the well logging method capable of storing the relative flow rate, overflow can be eliminated, so that the error brought by measuring is zero, and under the conditions of being low in injecting quantity and high in pressure, logging accuracy can be greatly improved.

Description

technical field [0001] The invention relates to a well logging method, in particular to a well logging method for storing related flow. Background technique [0002] At present, when measuring the flow rate of high-pressure (above 20MP) water injection wells, because the cables cannot be sealed well during the logging process, when the pressure of the water injection well is too high, the injected water may flow out of the overflow pipe at the wellhead, seriously It will overflow from the blowout preventer from time to time, which has a great impact on the environment. Today, as the environment is getting more and more important, this is absolutely not allowed. The traditional solution can only be to collect the liquid in the overflow pipe. There is no good solution for the liquid flowing out of the injector; due to the existence of overflow, it will seriously affect the accuracy of logging calculation results during well logging; usually, the higher the pressure, the more s...

AI Technical Summary

Problems solved by technology

[0002] At present, when measuring the flow rate of high-pressure (above 20MP) water injection wells, because the cables cannot be sealed well during the logging process, when the pressure of the water injection well is too high, the injected water may flow out of the overflow pipe at the wellhead, seriously It will overflow from the blowout preventer from time to time, which has a great impact on the environment. Today, as the environment is getting more and more important, this is absolutely not allowed. The traditional solution can only be to collect the liquid in the overflow pipe. There is no good solution for the liquid flowing out of the injector; due to the existence of overflow, it will seriously affect the accuracy of logging calculation results during well logging; usually, the higher the pressure, the more serious the overflow, which is harmful to logging The greater the impact on accuracy, even when the water injection volume is relatively low, all the injected water overflows from the overflow pipe, causing the illusion that the well has not injected water (usually, the higher the pressure, the more difficult the water injection, and the lower the water injection volume )

[0003] For high-pressure wells, the common test method is wireline tracer logging. The principle of tracer logging is to release small solid particle tracers on the upper part of the target layer; in the case of water injection, tracer particles will accumulate in the water-absorbing On the layer, calculate according to the ratio to get the water absorption ratio of each formation, but due to the influence of oil, casing wall and formation porosity, the tracer may also accumulate in the well section without water absorption, or the tracer enters the formation for comparison Depth leads to low measured values

Although this method can solve the problem of wellhead overflow, the measurement accuracy cannot be guaranteed, and it is easily affected by the formation

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