Method for determining phase state of oil-gas reservoir

A technology of oil and gas reservoirs and phase states, which is applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, which can solve the problems of high analysis costs and long periods, and achieve the effect of efficient and rapid exploration and development of oil and gas fields

Active Publication Date: 2019-11-05
PETROCHINA CO LTD
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  • Method for determining phase state of oil-gas reservoir
  • Method for determining phase state of oil-gas reservoir
  • Method for determining phase state of oil-gas reservoir

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[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 a phase state of an oil-gas reservoir. The method comprises step S1 of utilizing a comprehensive two-dimensional gas chromatography - time-of-flight mass spectrometer GC x GC- TOFMS to recognize and identity ethyl Noradamantane series compounds in a plurality of crude oil samples, thereby obtaining peak information of each compound; step S2 of quantitatively analyzing the ethyl Noradamantane series compounds to obtain contents of the ethyl Noradamantane series compounds; step S3 of fitting a relation between the content of the ethyl Noradamantane series compounds and gas-oil ratio of an oil reservoir; step S4 of establishing a relationship between the gas-oil ratio of the oil reservoir and the phase state of the oil-gas reservoir; and step S5 of determining the phase state of the oil-gas reservoir. The invention determines the phase state of the oil-gas reservoir by utilizing content of ethyl Noradamantane , thereby providing a new indexfor determining the phase state of a deep-level oil-gas reservoir, and providing a new pattern of solution to oil-gas resource evaluation.

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...

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Application Information

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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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