A device for simulating casing damage process

Abstract

The invention provides a device for simulating the casing damage process, which includes a formation simulation device. Fluoroethylene pipe, the bottom of the polytetrafluoroethylene pipe penetrates through the simulated formation and is sealed by a gasket; plastic material is injected into the polytetrafluoroethylene pipe to simulate the deformation of the formation. The invention can truly simulate the deformation of the casing caused by stratum slippage, and at the same time, according to the experimental requirements, can realize the research on the law of the deformation of the casing with different water injection pressures, different stratum physical properties and different stratum deformations.

Description

technical field [0001] The invention relates to a device for simulating casing damage process in the field of petroleum engineering. Background technique [0002] During the exploitation and development of oil and gas fields, casing damage occurs from time to time. The main cause of casing damage is that under complex in-situ stress, the overlying strata and strata slip to varying degrees, and the resulting shear force acts on the casing, resulting in deformation and failure of the casing. The existing casing damage simulation device is studied by cementing the simulated casing and measuring the distribution of casing wall pressure, but the simulation method has the following defects: [0003] 1. Since cement needs to be added during the simulation process, the simulated casing must be fixed in the simulation device, and it is impossible to take out the casing and directly measure its deformation and deformation law; [0004] 2. The key factor causing casing damage is form...

AI Technical Summary

Problems solved by technology

[0003] 1. Since cement needs to be added during the simulation process, the simulated casing must be fixed in the simulation device, and it is impossible to take out the casing and directly measure its deformation and deformation law;

[0004] 2. The key factor causing casing damage is formation slip, but in existing devices, it is impossible to monitor and capture formation deformation, which limits casing damage research to the casing, and it is impossible to carry out formation slippage and casing deformation law study

[0005] Due to the inability to simulate the deformation of the underground casing, the existing research can only stagnate in the stress analysis of the pipe wall. How the underground casing deforms and how its deformation law is still blank in the simulation research, making casing damage The research lacks the necessary experimental support

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