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Method for predicting deep oil-gas reservoir by BTEX anomaly in sea-bottom shallow sediment

A sediment and xylene technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem that methane is easily disturbed by the environment, achieve fast sampling speed, high analysis accuracy, and reduce demand

Inactive Publication Date: 2007-07-18
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to find a suitable sample medium that is well preserved, less disturbing and easier to collect for oil and gas direct indicators, overcomes the shortcoming that methane is easily disturbed by the environment, and establishes that the detection sensitivity of benzene, toluene, ethylbenzene and xylene reaches ppt (10 -12 ) level detection method, providing an important means for the efficient exploration of offshore oil and gas

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  • Method for predicting deep oil-gas reservoir by BTEX anomaly in sea-bottom shallow sediment
  • Method for predicting deep oil-gas reservoir by BTEX anomaly in sea-bottom shallow sediment
  • Method for predicting deep oil-gas reservoir by BTEX anomaly in sea-bottom shallow sediment

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Embodiment Construction

[0032]Figure 1 Technical process. 1. Sampling: According to the work plan, design a sampling grid in the sampling area with a sampling density of 500-1000 meters per point, collect shallow seabed sediments, quickly seal the samples in PVC sleeves or other containers, and freeze them for storage. 2. Measurement of benzene, toluene, ethylbenzene, and xylene: put the sample directly into the sample cell of the purge and trap instrument, heat directly to evaporate benzene, toluene, ethylbenzene, and xylene, and then use a cold trap to evaporate the benzene, toluene , ethylbenzene, and xylene are adsorbed and enriched, and are automatically connected to a gas chromatograph with a photoionization detector for measurement. 3. Data analysis: data preprocessing is carried out first, and some extremely high or extremely low data are eliminated, and then the average value and variance are calculated. Form an Excel data file together with the data of each measuring point and the latitude...

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Abstract

The invented method used BTEX in sea-bottom shallow-layer sediment as geochemical mark of hydrocarbon reservoir, and utilizes the equipments of purging trapping apparatus, gas chromatograph with photo ionization detector and computer, etc. and adopts the techniques of sample pretreatment, separation, identification and high-sensibility measurement so as to predicate the deep hydrocarbon reservoir. Said invention also provides the working principle of said method and its concrete working steps.

Description

Technical field: [0001] The invention relates to a new method for predicting seabed deep oil and gas reservoirs, which belongs to the field of oil and gas geochemistry. Background technique: [0002] The guiding ideology of oil and gas geochemical exploration is the vertical migration mechanism of hydrocarbons. It is generally believed that the gas rising from the oil and gas reservoir, the main component is methane, is the "messenger" (messenger) indicating the underground oil and gas reservoir. Therefore, the main detection object of traditional oil and gas geochemical exploration is methane in soil-gas, that is, to detect gaseous methane light hydrocarbon components dissociated in soil gaps to achieve the purpose of finding oil and gas reservoirs. Because the source of methane is not unique, it is often interfered by biogenic methane, and the application effect is not good. [0003] In the past ten years, oil and gas geochemical exploration has developed towards the uni...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/86G01N30/02G01N1/12
Inventor 陈瓞延马万云刘海生
Owner TSINGHUA UNIV
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