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A method for calculating real pressure and gas reserves of low permeability gas reservoirs using production data

A technology of production data and gas reservoir reserves, applied in calculation, design optimization/simulation, electrical digital data processing, etc., can solve problems such as limited penetration depth of pressure gauge, long-term well shutdown recovery, formation porosity and stress damage, etc.

Active Publication Date: 2022-08-09
CHINA PETROLEUM & CHEM CORP +2
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Problems solved by technology

For the pressure measurement of low-permeability gas reservoirs, there are currently the following three problems: ① It takes a long time to shut down the well and restore it, which affects production; The local stress concentration at the holes and fractures causes the formation pressure to be too high. Even if the well is shut down for testing, the pressure cannot represent the true pressure of the formation
③In addition, due to the large well depth and well deviation, the penetration depth of the pressure gauge is limited, and the formation pressure cannot be accurately obtained when the wellbore is deep in liquid.

Method used

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  • A method for calculating real pressure and gas reserves of low permeability gas reservoirs using production data
  • A method for calculating real pressure and gas reserves of low permeability gas reservoirs using production data
  • A method for calculating real pressure and gas reserves of low permeability gas reservoirs using production data

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Embodiment Construction

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

[0035] like figure 1 As shown in the figure, the method of using production data to calculate the real pressure and gas reserves of low permeability gas reservoirs includes the following steps:

[0036] 1. Export production data information into execl format files, such as figure 2 shown;

[0037] 2. Input execl related data: casing pressure, daily gas production, cumulative gas production, cumulative water production; use casing pressure to calculate bottom hole flow pressure Pwf;

[0038] 3. Assuming a formation pressure, calculate the apparent formation pressure, and obtain the productivity equation, so as to obtain the corresponding gas r...

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Abstract

The present invention disclosed a method of using production data to calculate the real pressure and gas collection reserves of low osmotic collection, including steps: S1, export the production data of a well in the gas field development information network; S2, read the production data in the production dataSet pressure, Nissan gas volume, cumulative gas production and cumulative water production, use the cover pressure to calculate PWF at the bottom of the well; S3, assuming an original pressure pi of the gas collection, find the output equation;Until the linear correlation is satisfactory; S5, calculating single well control reserves G.The present invention uses the material balance method to obtain the control of low osmotic collection control. By continuously trying up the pressure, it can cause the material balance equation to form a straight line stream pressure, which is the pressure required.

Description

technical field [0001] The invention relates to a method for calculating the reserves of gas production wells, more specifically, a method for calculating the real pressure and reserves of low-permeability gas reservoirs by using production data. Background technique [0002] The original pressure of the gas reservoir is not only used to calculate the single-well controlled reserves of the low-permeability gas reservoir, but also to calculate the unobstructed flow rate of the gas production well, and to predict the gas layer pressure in the future. For pressure measurement of low-permeability gas reservoirs, there are currently the following three problems: (1) It takes a long time to shut down the well for recovery, which affects production; (2) Due to fracturing stimulation, a large amount of fracturing fluid is squeezed into the formation, and the formation pores and stress are damaged. The local stress concentration at the holes and fractures causes the formation pressur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/28E21B47/00G06F113/08
CPCE21B47/00Y02A10/40
Inventor 唐人选蒋永平梁珀吴公益姬洪明王联果祝铭辰
Owner CHINA PETROLEUM & CHEM CORP
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