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

A technology for sediments and oil and gas reservoirs, which is used in measurement devices, instruments, scientific instruments, etc. to achieve the effects of fast sampling, high analysis accuracy, and improved exploration efficiency

Inactive Publication Date: 2006-03-01
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 BTEX 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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example 2

[0036] Figure 5 Example 2: The abnormal distribution of BTEX in shallow sediments in a certain area of ​​the South China Sea is consistent with the exploration results of 5,000-meter underlying oil and gas reservoirs on the seabed obtained by traditional methods. (The darker the color, the higher the content of BTEX. Around the pre-drilled well determined by geophysical survey, the content of BTEX shows ring anomaly and top anomaly.)

[0037] Specific implementation steps:

[0038] 1. Based on geological and geophysical data, that is, the selected target area is judged from gravity and seismic data. It is currently a prospective basin. According to the degree of detail of the evaluation, the geochemical sampling range and sampling grid are designed, and each sampling area is calculated. The latitude and longitude of the point.

[0039] 2. Implement exploration ships with sampling functions and corresponding gravity sampling tools, and skilled operators.

[0040] 3. Prepare...

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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 high mo...

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Application Information

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Patent Type & Authority Applications(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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