High-temperature high-pressure clay cake interface agglutination simulating-estimating device

Abstract

The invention provides a laboratory high-temperature and high-pressure mud cake cementation quality evaluation device, which mainly includes a high-temperature autoclave (19), a simulated shaft (13), an intermediate container (22), a heating and cooling system, a pressure source and a pressure system, and a data set. Acquisition controller (23), computer (30) and output device (31). Its function is to simulate downhole pressure and temperature conditions, realize continuous experimental operations such as drilling fluid wellbore fluid loss, drilling fluid flushing and displacement, cementing fluid injection, and solidification of cementing fluid, and simulate and evaluate downhole drilling fluid and mud cake. The impact on the cementing quality of the cementing fluid interface, the evaluation of the flushing effect of different flushing fluids on the annulus, the shear cementation strength of the interface between the two is measured by pressure shear, and the hydraulic cementation strength of the interface between the two is measured by the principle of water pressure channeling. Provide experimental data for performance formulation optimization and engineering design of drilling fluid and cementing fluid in oilfield drilling engineering.

Description

technical field [0001] The patented invention of this application belongs to petroleum drilling scientific research and production experiment instruments in the field of petroleum exploration and development, and relates to an evaluation instrument for simulating on-site pressure and temperature conditions in a laboratory environment and testing the bonding quality of the first and second interfaces of downhole cementing. Background technique [0002] The cementing quality of oil (gas) wells can be evaluated by the cementation quality of the first interface (cement sheath and casing) and the second interface (cement sheath and formation). The instruments used to measure the cementation quality of oil (gas) well cementing interface at the construction site are large-scale instrument carts and cables, mainly including acoustic amplitude logging, acoustic wave variable density logging, MAK-2 acoustic wave and gamma density logging, etc. method, an instrument cart requires a lar...

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Problems solved by technology

[0003] In order to solve the problem of lack of laboratory simulation evaluation devices for mud cake quality and solidification cementation quality at home and abroad, the present invention proposes a method that can simulate downhole conditions and test indoors: 1. After the cement slurry cementing of oil (gas) wells, the first The shear bond strength of the first interface and the mud cake interface; 2. The hydraulic bond strength of the second interface after cementing the oil (gas) well cement; 3. The experimental evaluation of the flushing and displacement effects of different flushing fluids on the simulated annulus device

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