Formation pressure calculation method based on short-term production data

A technology of formation pressure and production data, which is used in computing, manufacturing computing systems, electrical digital data processing, etc.

Active Publication Date: 2019-10-22
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual application process, the formation pressure at the parallel starting point of the curve cannot be obtained, so the original formation pressure is often used instead of the form

Method used

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  • Formation pressure calculation method based on short-term production data
  • Formation pressure calculation method based on short-term production data
  • Formation pressure calculation method based on short-term production data

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0091] Specific embodiment

[0092] The implementation process is as follows:

[0093] Taking Well S4 in the southeastern part of the Ordos Basin as an example, first conduct a steady production pressure drop test, and then conduct a three-month shut-in pressure recovery test. Two production points in the steady production pressure drop test stage are selected for calculation, of which the second production point To stabilize the end of the pressure drop test phase, the time interval between the first production point and the second production point is 21 days.

[0094] The implementation process is as follows:

[0095] 1) Obtained from Well S4: original formation pressure p i =26.315MPa; deviation coefficient Z under original conditions i =0.906; bottom hole flowing pressure p at the first production point wf1 =15.757MPa, bottom hole flowing pressure p at the second production point wf2 =15.505MPa; the cumulative gas production of the first production point G p1 =1154.43×10 4 m 3 ,...

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Abstract

The invention relates to the technical field of oil and gas field development, in particular to a formation pressure calculation method based on short-term production data. The formation pressure calculation method based on short-term production data comprises the steps that formation pressure and cumulative gas of any two production points with the quasi-stable state stage production time interval smaller than one month are selected, in combination with the relation between the deviation coefficient under the original formation pressure and the original condition, the deviation coefficient with the pressure larger than or equal to 13 MPa and the pressure, the formation pressure calculation method based on any production point is built, the cumulative gas of any production point is substituted into the method, and the corresponding formation pressure is calculated. Relative to the field measurement method and the matter balance method, the economic losses brought by well closing and test can be reduced, relative to a flowing matter balance method, approximate calculation is avoided, the result meets the reality, the related parameters of two production points are only needed, and the calculation process is simpler.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a formation pressure calculation method based on short-term production data. Background technique [0002] Formation pressure, as the driving force of gas reservoir development, determines the gas production rate and economic benefits of gas wells. Keeping track of changes in formation pressure is crucial to ensuring the production increase, stable production and later development adjustment of gas wells and gas reservoirs. Existing formation pressure acquisition technologies include two categories: actual measurement method and calculation method: the actual measurement method is the most accurate but requires a long time to shut down the well, and shutting down the well for a long time will bring economic losses to the gas wells with production tasks; the calculation method Simple and fast, material balance method and flowing material balance method are th...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/06G06F17/50
CPCE21B49/00E21B47/06G06F2119/06G06F30/20Y02P90/30
Inventor 张磊王永科宋珈萱辛翠平米乃哲曹军张亮梁海军
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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