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Stratum crack leaking stoppage simulation device and simulation system

A simulation device and simulation system technology, applied in wellbore/well components, earthwork drilling, construction, etc., can solve the problems of unplugged, leakage, etc.

Active Publication Date: 2021-05-18
CHINA OILFIELD SERVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, various oilfield laboratories are carrying out a large number of plugging simulation experiments, and have screened out a variety of mud formulas suitable for drilling plugging. During the construction process, there are situations where the seal cannot be sealed or leakage occurs again after the seal is closed

Method used

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  • Stratum crack leaking stoppage simulation device and simulation system
  • Stratum crack leaking stoppage simulation device and simulation system

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0021] For the leakage plugging formula selected in the laboratory, it is used in the field construction process, but it cannot be plugged or leakage occurs again after plugging. After many experiments and analysis, the reasons for this situation are obtained: one is plugging The leakage formula itself is unreasonable, the depth of the fracture is not enough, and there is a phenomenon of sealing the door. During the construction process, due to the disturbance of the drilling tool and drilling fluid, the leakage is easy to occur again; Due to the influence of liquid column pressure, there i...

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Abstract

The invention provides a stratum crack leaking stoppage simulation device and simulation system. The simulation device comprises a shell, a simulation crack upper plate, a simulation crack lower plate and an overburden pressure booster pump; the front end and the rear end of the shell are provided with an inlet and an outlet respectively, the simulation crack upper plate and the simulation crack lower plate are installed in the shell, a simulation crack is defined by the simulation crack upper plate and the simulation crack lower plate, and the two ends of the simulation crack extend to the inlet and the outlet respectively; the simulation crack lower plate can move in the direction perpendicular to the simulation crack, the simulation crack upper plate is provided with a plurality of pressure measuring points, the pressure measuring points are connected to one end of a pressure transmission pipeline, the other end of the pressure transmission pipeline penetrates through the shell to be connected to a pressure sensor, wherein the other end of the pressure transmission line connected to one of the pressure measuring points passes through the shell to be also connected to the overlying pressure booster pump.

Description

technical field [0001] The present application relates to but is not limited to the field of downhole simulation devices, in particular to a formation fracture plugging simulation device and a simulation system. Background technique [0002] Lost circulation is a very common phenomenon in the drilling process, and most wellbores have different degrees of lost circulation. Severe lost circulation will lead to a decrease in the stability of the well wall, affect the drilling speed, and even threaten the personal safety of the operators, bringing great troubles to oil and gas exploration and oil and gas field protection. [0003] There are many reasons for lost circulation, among which natural fractures and holes account for about 70% of well lost, induced fractures account for 20%, and others account for 10%. Plugging formula (plugging slurry), which requires simulation of various leakage situations in the laboratory in advance and screening of suitable plugging formula. At ...

Claims

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Application Information

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IPC IPC(8): E21B47/117E21B33/13
CPCE21B33/13
Inventor 张伟陈缘博陈家旭王超群陈俊生冀腾赵志强苗海龙
Owner CHINA OILFIELD SERVICES
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