High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system

A technology for simulating strata and an experimental system, which is applied in the field of drilling and can solve the problems of distortion of the properties of the simulated stratum and the actual stratum, and the results of field application are too different.

Inactive Publication Date: 2009-04-15
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the serious distortion of the simulated formation and the actual formation properties, the experimental results are too different from the field application results

Method used

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  • High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system

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Embodiment Construction

[0022] The structure of the present invention is as figure 1 As shown, the high-fidelity simulated formation drilling plugging evaluation experimental system includes a pressure device plunger pump 1, a plugging fluid container 3, a pressure gauge, and a hydraulic pump 8. The plunger pump 1 passes through the plugging fluid container 3 and the high-fidelity leaky layer. Simulator 5 is connected. A pressure gauge 2 is installed between the plunger pump 1 and the leakage fluid container 3, a pressure gauge 4 is installed between the leakage fluid container 3 and the high-fidelity leakage layer simulator 5, and a pressure gauge 4 is installed between the annular space 15 and the hydraulic pump 9. There are pressure gauges7. Piston pump 1 The maximum displacement of the pump is 13L / h, and the maximum pressure is 50Mpa. The plunger pump hydraulically injects the plugging into the simulated formation. The working medium used is clear water, preferably distilled water. The leak st...

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PUM

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Abstract

The invention discloses an evaluation experimental system of plugging of high-fidelity simulated formation drilling. The system at least comprises a pressure device, a plugging liquid container, a pressure meter and a hydraulic pump; wherein, a pressure system is connected with a high-fidelity loss zone simulator through the plugging liquid container. The invention can highly meet the requirements of differential pressure at the bottom of the drilling, the property and size of the added plugging materials and the interaction of the added plugging materials and the formation according to the physical, chemical and mechanical property of lost rock and the main similarity conditions of geometric, chemical, dynamic, motion and material similarity and the like of simulated formation fracture. The device can be used repeatedly, has low cost and convenient operation and has wide application value and market prospect.

Description

technical field [0001] The invention relates to a high-fidelity simulated stratum drilling plugging evaluation experimental system, which belongs to the field of drilling. Background technique [0002] Lost circulation is a common and often encountered complex problem in oil and gas drilling. Downhole complex accidents caused by lost circulation are extremely harmful to drilling and completion, and have always been a concern of petroleum engineering circles at home and abroad. In the drilling operation, once leakage occurs, not only the drilling time will be delayed, the drilling fluid will be lost, and the oil and gas layers will be damaged, but it may also cause a series of complex situations and accidents such as well collapse, stuck pipe, blowout, etc. due to the instability of the well wall, and even lead to the failure of the wellbore. scrapped, resulting in major economic losses. [0003] The formation leakage is closely related to the physical, chemical and mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/10E21B47/005
Inventor 窦斌
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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