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Stratum information inversion system and method in pressure control drilling process

A managed pressure drilling and inversion technology, which is applied in earth-moving drilling, flushing wellbore, wellbore/well components, etc. It can solve the problem of inability to synergize inversion of formation information, and reduce the risk of blowout, technology and measurement method. Simple, fast processing effects

Active Publication Date: 2021-11-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the help of the control of the fluid flow process and the accurate measurement of the flow parameters, a real-time inversion method of formation information (including formation pressure and permeability) is constructed based on the measurement parameters; the method of the present invention can determine the formation in the process of managed pressure drilling Pressure and permeability, solving the problem that existing methods cannot coordinately invert formation information

Method used

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  • Stratum information inversion system and method in pressure control drilling process
  • Stratum information inversion system and method in pressure control drilling process
  • Stratum information inversion system and method in pressure control drilling process

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A formation information inversion system in the process of managed pressure drilling, such as figure 1 As shown, including the surface flow parameter measurement system and data information retrieval system;

[0071] The surface flow parameter measurement system includes: wellhead spool 9, rotary control head 8, throttle manifold 15, gas-liquid separator 18, temperature sensor 23, pressure sensor 22, Venturi tube 21, drain line pressure gauge 24, quality Flow meter 25, mud pool 2, mud pump 4, standpipe pressure gauge 6;

[0072] The wellhead spool 9 is set on the top of the wellhead, the rotary control head 8 wraps the drill pipe 7, the surface of the rotary control head 8 is provided with a rotary control head discharge pipeline, and the rotary control head discharge pipeline communicates with the wellbore annulus 13; the choke manifold 15 passes through the joint The flow manifold input pipeline 14 is connected to the discharge pipeline of the rotary control head; th...

Embodiment 2

[0081] A stratigraphic information inversion method, comprising the steps of:

[0082] (1) According to the on-site drilling construction data, determine the engineering parameters required for formation information inversion; the engineering parameters include: well body structure, wellbore trajectory, drilling tool assembly, production layer position, relative density of produced gas, and geothermal gradient , drilling fluid displacement, drilling fluid density, etc.

[0083] (2) Analyze the drilling fluid circulation time in the wellbore, and use the formula i to calculate the drilling fluid circulation time for one week:

[0084] t cir =(V DP +V A ) / Q in i

[0085] In the formula: t cir Indicates the time taken for the drilling fluid to circulate for one week, that is, the time it takes for the drilling fluid to be injected from the drill pipe until it returns from the annulus, s; V DP is the internal volume of the drill pipe, m 3 ;V A is the inner volume of the ...

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Abstract

The invention provides a stratum information inversion system and method in a pressure controll drilling process. By means of the system, the fluid flow process is controlled, flow parameters are accurately measured, and then a real-time inversion method of stratigraphic information (including formation pressure and permeability) is constructed based on the measured parameters; according to the system and the method, the formation pressure and the permeability in the controlled pressure drilling process can be determined, and the problem that the stratigraphic information cannot be inversed cooperatively in an existing method is solved.

Description

technical field [0001] The invention relates to a stratum information inversion system and method in the process of managed pressure drilling, belonging to the field of petroleum and natural gas engineering. Background technique [0002] In the field of oil and gas well engineering, formation information evaluation is the key content of drilling and completion risk control, especially for the design of well control scheme after overflow, including the choice of well killing method and the design of well killing parameters (killing fluid density, displacement) Wait. Timely and accurate acquisition of formation pressure information helps to quickly deal with overflow and reduce the risk of blowout. In addition, the accurate prediction of formation pressure and permeability properties can provide theoretical guidance for subsequent test production and optimization of mining systems. [0003] At present, in the process of drilling and completion, the evaluation of formation pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B21/08E21B47/06E21B47/07
CPCE21B47/00E21B47/06E21B47/07E21B21/08
Inventor 孙小辉孙宝江李昊王志远高永海王金堂张剑波廖友强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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