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Estimation method for components of single oil inclusion

An inclusion and single technology, applied in the field of petroleum geological exploration, can solve the problems of pollution and the difficulty of popularization and application of ancient pressure recovery methods, and achieve the effect of restoring pressure

Active Publication Date: 2015-06-17
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the population inclusions, the composition changes among individuals, and the pollution problem of the inclusion population analysis test method still makes it difficult to popularize the paleopressure recovery method

Method used

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Embodiment Construction

[0046]Here, taking the Shengtuo area in the steep slope zone of Dongying Sag as an example, the application effect of this patent is illustrated. Shengtuo area is an important oil producing area of ​​Shengli Oilfield. Nine crude oil samples were collected in this area, and natural gas test data were collected. The mole fractions of liquid and gaseous saturated hydrocarbons were obtained by step (4). Through steps (5)-(7), nC is obtained 15 ~nC 27 The index α of the inter-exponential distribution, the β value of the natural gas and the mole fraction of the gas phase. High-resolution and high-precision microfluorescence spectroscopy tests were carried out on crude oil samples and oil inclusions in inclusion pairs, and the fluorescence spectrum parameters were calculated according to step (8). Through step (9), the regression equations between α, β and gas phase mole fractions and fluorescence spectral parameters are established. The same high-resolution and high-precision m...

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Abstract

The invention relates to an estimation method for components of a single oil inclusion. According to the estimation method for the components of the single oil inclusion, three parameters, namely alpha, beta and gas-phase molar fraction, of the single oil inclusion are acquired by carrying out high-resolution and high-precision microscopy fluorescence spectrum testing on the oil inclusions, the components of the single oil inclusion are further estimated, so as to provide important supports for effectively recovering the pressure of paleofluid and revealing the migratory direction of the paleofluid and an oil-gas distribution law.

Description

technical field [0001] The invention belongs to the field of petroleum geological exploration, in particular to an oil and gas geochemical method. Background technique [0002] The flow direction of paleofluids is important information for oil and gas exploration. The paleo-fluid pressure is the basis for understanding the flow direction of the paleo-fluid, and the restoration of the paleo-fluid pressure requires the components of a single oil inclusion. Composition estimation of individual oil inclusions has long remained unresolved, posing an obstacle to paleofluid pressure recovery. [0003] Fluid inclusions are "primitive samples" formed after paleofluids are trapped by host minerals in the reservoir. By dividing different stages and restoring the paleopressure of fluids in each stage, the migration direction of fluids in each stage can be revealed. The restoration of paleofluid pressure in sedimentary basins mainly adopts the PVTsim (or VTFLINC) method developed by C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 张刘平
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI