A method for rational production allocation of gas wells

A gas well and reasonable technology, applied in the field of gas reservoir development, can solve problems such as poor production stability, difficulty in meeting production requirements, and poor results, and achieve reasonable allocation production and good practicability

Active Publication Date: 2022-02-15
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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Problems solved by technology

[0003] At present, the commonly used empirical method for gas well proration is to set the value of production proration in the range of 1 / 3 to 1 / 5, and the effect is not very good, especially for reservoirs characterized by developed fractures, strong heterogeneity, and active edge and bottom water. Layers, such as volcanic rocks, etc., this method has very poor adaptability, and the proration of gas wells is very likely to be too high or too low
A high gas well production ratio will lead to problems such as rapid formation pressure drop, severe condensate loss, and poor production stability; a low gas well production ratio will lead to low formation energy utilization, poor development benefits, and difficulty in meeting production requirements

Method used

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  • A method for rational production allocation of gas wells
  • A method for rational production allocation of gas wells
  • A method for rational production allocation of gas wells

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Embodiment 1

[0043] The existing production allocation of gas reservoir wells in a certain area cannot realize the long-term high and stable production of the gas reservoir well. The reasonable production allocation method of gas wells of the present invention is used for production allocation. Assuming that the production loss rate of gas wells is 10%, the production allocation results are shown in the table 1 shows:

[0044] Table 1 embodiment 1 the present invention's distribution result

[0045]

[0046]

[0047] Note: In this embodiment, the atmospheric pressure is 0.101325MPa, which is approximately equal to 0 during calculation.

[0048] In this embodiment, mining is carried out after adopting the production allocation determined by the present invention, and the output is higher and more stable than the previous production allocation, which is a significant improvement compared with the prior art.

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Abstract

The invention discloses a method for rational production allocation of gas wells, comprising the following steps: calculating the non-Darcy coefficient and assuming the production loss rate of the gas well; according to the non-Darcy coefficient and the production loss rate, calculating the Dimensionless yield; according to the dimensionless yield under the Darcy state and the yield loss rate, calculate the dimensionless yield under the non-Darcy state; according to the dimensionless yield under the non-Darcy state, The gas production is calculated, and the gas production is the reasonable allocation of the gas well. The invention introduces the concept of production loss rate, so that the calculated prorated production is more reasonable, so as to realize the efficient development of gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of gas reservoir development, in particular to a method for rational production allocation of gas wells. Background technique [0002] Reasonable production allocation of gas wells is a prerequisite for realizing long-term high and stable production of gas fields. There are many factors affecting the reasonable production allocation of gas wells, such as gas well productivity, fluid properties, production system, production process, gas reservoir development methods, etc. The reasonable production allocation of different gas wells is different. [0003] At present, the commonly used empirical method for gas well proration is to set the value of production proration in the range of 1 / 3 to 1 / 5, and the effect is not very good, especially for reservoirs characterized by developed fractures, strong heterogeneity, and active edge and bottom water. Layers, such as volcanic rock, etc., this method has very poor ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B49/00
CPCE21B43/00E21B49/00
Inventor 罗建新刘继柱李道清陈军闫利仇鹏
Owner SOUTHWEST PETROLEUM UNIV
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