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

A technology for sand control screens and life prediction, which is applied to measuring devices, testing wear resistance, instruments, etc., can solve the problems of inability to accurately predict the erosion resistance of screens, and achieve simple and easy-to-use prediction methods and accurate prediction results Effect

CN106596312BActive Publication Date: 2019-03-12PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-03-12

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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.
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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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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] Such as figure 1As shown, the present invention provides a method for predicting the erosion life of a sand control screen used in a perforated well completion gas well, which includes the following steps: Step S1, preparing a test device for the erosion resistance of the screen; Abrasive particles are added to the screen erosion resistance test device, and the sand control screen is subjected to a jet erosion test through the screen erosion resistance ...