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A method for determining the phase state of oil and gas reservoirs

A technology of oil and gas reservoirs and phase states, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of high analysis cost and long cycle, and achieve the effect of efficient and rapid exploration and development of oil and gas fields

Active Publication Date: 2022-02-01
PETROCHINA CO LTD
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Problems solved by technology

However, there are common problems such as high analysis cost and long cycle

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  • A method for determining the phase state of oil and gas reservoirs
  • A method for determining the phase state of oil and gas reservoirs
  • A method for determining the phase state of oil and gas reservoirs

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Embodiment Construction

[0065] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0066] The present invention is illustrated by taking Tarim Basin oil and gas reservoirs as an example:

[0067] 1) Take 200mg crude oil sample in 2mL autosampler bottle, add 0.5μg / μL D 16 - 40 μL of adamantane standard sample, after mixing evenly, add dichloromethane to 1.5 mL.

[0068] 2) The crude oil samples were analyzed by a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOFMS) produced by Leco Company of the United States. The adamantane series compounds are identified and identified, and the peak information of each compound is obtained, such as Figure 2a-Figure 2f It...

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Abstract

The invention discloses a method for determining the phase state of oil and gas reservoirs. The method comprises the following steps: S1, using a comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer GC×GC-TOFMS to identify and identify ethyl noradamantane series compounds in multiple crude oil samples, and obtain the peak information of each compound; S2 1. Quantitative analysis of ethyl noradamantane series compounds to obtain the content of ethyl noradamantane series compounds; S3, fitting the relationship between the content of ethyl noradamantane series compounds and the gas-oil ratio of the reservoir; S4, establishing The relationship between the gas-oil ratio of the reservoir and the phase state of the oil and gas reservoir; S5. Determine the phase state of the oil and gas reservoir. The invention provides a new index for determining the phase state of deep oil and gas reservoirs by using the content of ethyl noradamantane to determine the phase state of oil and gas reservoirs, and provides a new solution for the evaluation of oil and gas resources.

Description

technical field [0001] The invention belongs to the technical field of petroleum sample analysis, and in particular relates to a method for determining the phase state of oil and gas reservoirs. Background technique [0002] The determination of the phase state of hydrocarbon fluids is the basis of oil and gas resource exploration and evaluation, and is the primary problem to be solved in the process of oil and gas field development. The complexity of the fluid phase is mainly controlled by the type of hydrocarbon-generating parent material and the multi-stage thermal evolution. At the same time, changes in external temperature and pressure also affect the phase state of hydrocarbon fluids. To determine the phase state of oil and gas reservoirs is to determine the original phase state of hydrocarbons, and the phase state of hydrocarbon fluids in the surface state cannot represent the original phase state of hydrocarbons. PVT phase state analysis can restore the reservoir s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86G01N27/62
CPCG01N30/02G01N30/06G01N30/8679G01N27/62G01N2030/025
Inventor 朱光有池林贤王萌张志遥李婷婷杨海军韩剑发孙崇浩
Owner PETROCHINA CO LTD
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