Test method for isotope labeling of water outlet parts of high water-cut horizontal wells

Abstract

The invention provides an isotope labeling test method for a water outlet part of a high-water-content horizontal well. The isotope labeling test method sequentially comprises the steps that a, isotopes in a isotope release device are cured in a water-soluble carrier; b, the isotope release device is connected with an oil pipe and put down to the horizontal segment of the well; c, the isotopes are dissolved and released by the carrier in well bottom water, and the isotope release speed and the water flow speed are at a certain ratio; d, an oil extraction pump is started, and production test begins; and e, gamma spectrum analysis is continuously conducted on produced water on the ground, and the water outlet part of the high-water-content horizontal well is inversed through the type and characteristic content of the seized isotopes. According to the isotope labeling test method for the water outlet part of the high-water-content horizontal well, due to the fact that the isotope release device is transmitted through the oil pipe, limits of all kinds of well tracks and wellbore conditions can be overcome, and operation risks are reduced; the isotope labeling test method can be completed during pump inspection operation, packers, bridge plugs, downhole switches and other tools do not need to be used for being matched with the isotope labeling test method, and the platform occupying time can be shortened, so that the well logging cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of petroleum well logging devices, and in particular relates to an isotope labeling testing method for water outlet parts of high-water-cut horizontal wells. Background technique [0002] Accurate water outlet location diagnosis (also known as water detection test in the industry) is the basis and key to water control and oil stabilization in high water-cut horizontal wells, and it is also a long-standing problem in the production and management of horizontal wells at home and abroad. At this stage, we can only rely on the foreign cable testing method of "downhole crawler + holdup meter + multi-parameter instrument". However, through application, it is found that this method also has disadvantages such as difficulty in going down in complex drilling trajectories of horizontal wells, difficulty in passing in complex wellbores, high testing costs, difficulty in large-scale application by domestic companies, an...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of difficult implementation and high cost in the testing of water outlet parts of high water-cut horizontal wells in the prior art, the present invention provides a method for isotope labeling testing of water outlet parts of high water-cut horizontal wells

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