Shale gas well dynamic production allocating method

Patent metadata

Field	Value
Publication number	US-2022049604-A1
Application number	US-202017099562-A
Country	US
Kind code	A1
Filing date	Nov 16, 2020
Priority date	Aug 12, 2020
Publication date	Feb 17, 2022
Grant date	—

Abstract

The present invention provides a shale gas well dynamic production allocating method. The steps comprise: step 1, constructing a single well material balance equation of a shale gas well; step 2, according to the actual shale gas well related reservoir properties, establishing the relationship function between the cumulative gas production and the formation pressure in combination with constructing a single well actual material balance equation in step 1; step 3, calculating the cumulative gas production according to the current formation pressure; step 4, through the productivity test, establishing a binomial productivity equation, and allocating production according to the open flow; step 5, according to the production allocating result obtained in step 4, drawing a chart of cumulative gas production and formation pressure and single well production allocation; and step 6, according to the cumulative gas production of different reservoirs of a shale gas well, searching for the resulting chart for production allocation. The solution of the present invention can not only quickly allocate production. In the production process of a gas well, according to the current cumulative gas production of the well, a reasonable production allocation amount can be quickly determined by searching for the chart, and there is no need to consider time factors in the production allocating process, which is very convenient, efficient, and practical.

First claim

What is claimed is:

1 . A shale gas well dynamic production allocating method, wherein the steps comprise:
step 1, constructing a single well material balance equation of a shale gas well, wherein when the adsorbed gas is not desorbed, the material balance equation refers to formula (I);

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Assignees

• Univ Southwest Petroleum

Inventors

• Hu Shuyong
• Qiu Tingting
• Zhang Boning
• Zhang Jiatie
• Wang Xindong
• Huang Wenhai

Classifications

• E21B43/00 Primary

  Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B) · CPC title

• E21B43/25 Primary

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title

• E21B49/008 Primary

  by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor (measuring pressure E21B47/06) · CPC title