A method for predicting the erosion life of sand control screens used in perforated completion gas wells

Abstract

The invention provides a prediction method for erosion life of a sand control screen pipe in a perforation completion gas well. The method includes the steps of: S1. preparing a screen pipe erosion resistance testing device; S2. adding abrasive particles into the screen pipe erosion resistance testing device to perform jet erosion test on the sand control screen pipe so as to obtain the abrasive particle content C0, the abrasive particle erosion velocity v0 and the screen pipe test erosion destruction time t; S3. extracting a formation sand sample in the perforation completion gas well to obtain formation sand shape coefficient k1 and the formation sand density rho1; S4. performing pilot production on the perforation completion gas well to obtain the formation sand production content C1 and blasthole gas flow rate v1; and S5. predicting the erosion life of the sand control screen pipe in the perforation completion gas well according to the following formula as shown in the specification. The method provided by the invention can truly and accurately predict the erosion life of the sand control screen pipe in the perforation completion gas well, and provides basis for selection of an appropriate sand control screen pipe in gas well sand control operation.

Description

technical field [0001] The invention relates to the technical field of sand control in oilfield gas wells, in particular to a method for predicting the erosion life of sand control screen pipes used in perforated well completion gas wells. Background technique [0002] In the field of oil and gas extraction technology, especially for unconsolidated sandstone gas reservoirs, the problem of sand production has seriously affected the normal production of gas wells. Taking sand control measures is the main way to solve the problem of sand production in gas wells. Among them, sand control screens are the most important sand control measures. , one of the most commonly used tools. Sand control screens are eroded by high-speed sand-containing gas for a long time, and the filter material is easily damaged, resulting in sand control failure and shortening the sand control life. The statistical analysis of the failure factors of screen tube sand control shows that erosion damage is o...

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Problems solved by technology

[0004] However, the above-mentioned screen tube erosion resistance test device cannot truly simulate the situation in the formation, nor can it accurately predict the erosion resistance of the screen tube in the gas well under the real formation environment. Moreover, the existing different gas wells have Different erosion risk levels, for gas wells with different erosion risk levels, it is necessary to choose sand control screens with different levels of erosion resistance performance, for example, for gas wells with higher erosion risk levels, it is necessary to use erosion resistance performance Therefore, by predicting the erosion life of different sand control screens in gas wells, it can provide an important basis for selecting suitable sand control screens for gas well sand control operations. However, the prior art has not been able to accurately predict Method for erosion life of screens used downhole

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