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Well drilling overflow experiment simulation device

An experimental simulation and overflow technology, which is applied in earthwork drilling, wellbore flushing, wellbore/well components, etc., can solve problems such as poor drilling data quality, data errors and missing data, and deviation of overflow warning results

Pending Publication Date: 2022-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing technology, because the drilling data is affected by the monitoring equipment and the complex drilling environment, large data errors and missing data will be generated. The quality of the drilling data is poor, and it is difficult to establish an accurate overflow early warning model. Deviation

Method used

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  • Well drilling overflow experiment simulation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 This is a schematic structural diagram of the drilling overflow experiment simulation device provided in the embodiment of the present application. like figure 1 As shown, the present invention provides a drilling overflow experiment simulation device, which includes a well flushing fluid circulation unit 1, a detection unit 2 and a pressure fluid input unit 3, and the well flushing fluid circulation unit 1 includes a simulated pipeline, a liquid circulation tank 12 and a driving pump 13. The liquid circulation tank 12 is communicated with the simulated pipeline, and the driving pump 13 is connected in the simulated pipeline to drive the simulated well-flushing fluid to circulate and flow between the liquid circulation tank 12 and the simulated pipeline. Specifically, the well-flushing fluid circulation unit 1 is used for The drilling fluid circulation in the drilling process is simulated, and the driving pump 13 is a centrifugal water pump, which is equivalen...

Embodiment 2

[0057] figure 2 A schematic structural diagram of the drilling overflow experiment simulation device provided in the embodiment of the present application, such as figure 2 As shown, on the basis of the first embodiment, the pressure gas input assembly 31 further includes a first valve 313 and a first pressure gauge 314 arranged on the first input pipeline 311 , and the first pressure gauge 314 is arranged at the left end of the first valve 313 , the first pressure gauge 314 is used to measure the gas pressure in the first input pipeline 311 . Specifically, on the basis of the first embodiment, the number of the first valve 313 and the first pressure gauge 314 is changed, and only one first valve 313 and the first pressure gauge 314 are provided. When the simulated high-pressure gas enters the wellbore, the first valve 313 and the first pressure gauge 314 are set Valve 313, by observing the change of the first pressure gauge 314, check whether the pressure value of the high...

Embodiment 3

[0059] image 3 A schematic structural diagram of the drilling overflow experiment simulation device provided in the embodiment of the present application, optional, such as image 3 As shown, the pressure gas source 312 is used instead to drive the pump. On the basis of Example 1, the experiment of entering high-pressure liquid and gas into the wellbore can be simulated at the same time. First close the second valve 324, open the third valve 326, observe the value of the second pressure gauge 325, and check the high pressure output by the lower liquid container 323. Whether the liquid meets the pressure of the simulation experiment, after it is normal, at this time, open the first valve 313 close to the pressure gas source 312, and check whether the pressure value of the high-pressure gas is normal by observing the change of the first pressure gauge 314. The other first valves 313 arranged on the first input pipe 311, and observing that the gas in the pressure gas source 312...

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Abstract

The invention provides a well drilling overflow experiment simulation device which comprises a flushing fluid circulation unit, a detection unit and a pressure fluid input unit, the flushing fluid circulation unit comprises a simulation pipeline, a liquid circulation tank and a driving pump, the liquid circulation tank is communicated with the simulation pipeline, and the driving pump is connected in the simulation pipeline. The simulated flushing fluid is driven to circularly flow between the liquid circulation tank and the simulated pipeline; the pressure fluid input unit is communicated with the simulation pipeline and used for introducing pressure fluid into the simulation pipeline, the detection unit comprises a liquid level detector, a pressure sensor and a processor, the liquid level detector is used for detecting the liquid level state in the liquid circulation tank, and the pressure sensor is used for detecting the pressure state in the simulation pipeline; the liquid level detector and the pressure sensor are both electrically connected with the processor, the processor obtains the volume change according to the liquid level state and obtains the change curve of the vertical pressure and the casing pressure of the drilling fluid according to the pressure state, an accurate overflow early warning model can be established, and safety is improved.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a drilling overflow experiment simulation device. Background technique [0002] With the development of oil exploration and development to deep and complex formations, the safety problem of drilling with narrow density windows has become more and more obvious. Drilling risks, especially overflow, occur frequently, and well control requirements also increase. Overflow refers to the formation pressure being drilled greater than When the bottom hole pressure occurs, the formation pressure forces the formation fluid into the well, causing the amount of drilling fluid returned from the wellhead to be greater than the pumped volume, and the wellhead drilling fluid overflows automatically after the pump is stopped. Therefore, timely warning of overflow risk is very important. The severity of overflow mainly depends on the porosity, permeability and negative pressure differ...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B21/08E21B21/10
CPCE21B21/00E21B21/08E21B21/10
Inventor 夏天果邓富元李炜张超
Owner PETROCHINA CO LTD
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