Method and device for determining density of natural gas in condensate gas reservoir stratum
A technology for condensate gas reservoirs and determination methods, which is applied in the field of determining the density of natural gas in condensate gas reservoir formations, can solve the problems of low accuracy and no effective method for calculating the density of natural gas in condensate gas reservoir formations, and achieve high accuracy , The effect of reducing the cost of sampling analysis
Active Publication Date: 2021-11-09
PETROCHINA CO LTD
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[0003] Analyzing natural gas high pressure physical properties (PVT) samples in the laboratory is the most accurate and effective method to obtain the density of formation natural gas, but it is difficult to realize for most condensate gas reservoir evaluation units; when the condensate gas reservoir evaluation unit does not have formation natural gas When calculating the density analysis value, the density of formation natural gas can only be calculated by analogy or by using conventional gas reservoirs, the accuracy is not high, and there is no effective method for calculating the formation natural gas density of condensate gas reservoirs
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[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0024] In the description of this specification, the words "comprising", "comprising", "having", "containing" and so on are all open terms, meaning including but not limited to. A description referring to the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one of the present application. Examples or examples. In this specification, schematic representations of the above terms do not ne...
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The invention provides a method and a device for determining the density of natural gas in a condensate gas reservoir stratum. The method comprises the following steps of: acquiring the stratum temperature and the stratum pressure of a target condensate gas reservoir; acquiring the condensate oil content of the target condensate gas reservoir according to the accumulated yield of condensate oil and natural gas of a production gas well in the target condensate gas reservoir within a set time length; analyzing a condensate oil sample and a natural gas sample of a wellhead of the production gas well in the target condensate gas reservoir to obtain the condensate oil density and condensate oil components of the target condensate gas reservoir and natural gas components under ground standard conditions; and acquiring the density of the natural gas in the stratum according to the stratum temperature, the stratum pressure, the condensate oil content, the condensate oil density and the condensate oil components of the target condensate gas reservoir and the natural gas components under the ground standard conditions. The method and the device can be used for determining the density of the natural gas in the condensate gas reservoir stratum, and are simple and high in accuracy.
Description
technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a method and device for determining the density of natural gas in a condensate gas reservoir formation. Background technique [0002] Formation natural gas density is the core parameter for evaluating natural gas volume coefficient, and natural gas volume coefficient is the core parameter for evaluating natural gas reserves. [0003] Analyzing natural gas high pressure physical properties (PVT) samples in the laboratory is the most accurate and effective method to obtain the density of formation natural gas, but it is difficult to realize for most condensate gas reservoir evaluation units; when the condensate gas reservoir evaluation unit does not have formation natural gas When calculating the density analysis value, the density of formation natural gas can only be calculated by analogy or by using conventional gas reservoirs, but the accuracy is ...
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IPC IPC(8): E21B49/00E21B47/00
CPCE21B49/00E21B47/00
Inventor 康志勇李晓涛王辉蓝阔贾相健李之旭李思圻胥玉静王淑霞
Owner PETROCHINA CO LTD