The Method of Producing Production of Gas Wells in Volcanic Gas Reservoirs

A technology for volcanic rocks and gas wells, which is applied in earthwork drilling, wellbore/well components, measurement, etc., and can solve problems such as the large difference between predicted production capacity and actual production capacity

Active Publication Date: 2020-08-07
PETROCHINA CO LTD
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for production allocation of gas wells in volcanic gas reservoirs, so as to solve the problem in the prior art that the predicted production capacity and actual production are very different

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  • The Method of Producing Production of Gas Wells in Volcanic Gas Reservoirs
  • The Method of Producing Production of Gas Wells in Volcanic Gas Reservoirs
  • The Method of Producing Production of Gas Wells in Volcanic Gas Reservoirs

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Embodiment Construction

[0043] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0044] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0045] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that wh...

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Abstract

The invention provides a method of gas well production allocation in volcanic gas reservoir. The method comprises following steps: the wellhead pressure of the gas well is converted to the bottom hole pressure of the gas well and a gas well productivity equation is established according to the flow pressure conversion formula; the steady flow pressure is determined according to the gas testing system, and the stable gas production is determined by the steady flow pressure and the productivity equation; according to recoverable reserves and development period of the gas well and the stable gas production, a development cycle model of a gas well is established to determine the predicted stable production of the gas well; gas well production test is carried out according to the predicted stable production and the predicted stable production is adjusted to determine the actual stable production. The wellhead pressure of the gas well is converted to the bottom hole pressure of the gas well and the gas well productivity equation is established; the stable production is determined by means of the productivity equation and the development cycle model of the gas well; therefore, the predicted productivity of the gas well determined by the method is close to actual production so as to increase the practicality and reliability of the method.

Description

technical field [0001] The invention relates to the technical field of gas well exploitation in gas reservoirs, in particular to a production allocation method for gas wells in volcanic rock gas reservoirs. Background technique [0002] The productivity evaluation and proration methods of volcanic gas reservoirs are different from those of conventional clastic rocks. Due to the multi-period impact of volcanic eruption, the lithology and lithofacies change rapidly, the plane heterogeneity of the reservoir is serious, the permeability is low and the difference is large, resulting in a large difference in gas well productivity. New wells usually use the absolute open flow rate obtained from gas testing tests for production proration, but the absolute open flow rate of a single well with different lithologies varies widely, generally between (10-150)×104m3 / d, while the same lithology such as rhyolite The absolute unobstructed flow rate of the single well Yan is also between (20...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B47/06E21B49/00
CPCE21B43/00E21B47/06E21B49/00
Inventor 陈超王彬李道清邱恩波张玉亮庞晶仇鹏
Owner PETROCHINA CO LTD
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