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Novel method for determining oil-gas migration and pool-forming periods

A technology of oil and gas migration and determination method, applied in the field of petroleum geological exploration, can solve problems such as errors, and achieve the effect of solving uncertainty problems

Active Publication Date: 2013-05-22
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

In the past work, aromatic hydrocarbons were used to explain, so it is easy to draw wrong conclusions

Method used

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  • Novel method for determining oil-gas migration and pool-forming periods
  • Novel method for determining oil-gas migration and pool-forming periods
  • Novel method for determining oil-gas migration and pool-forming periods

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Embodiment Construction

[0031] The Shengtuo area in the northern belt of the Dongying Sag is an important oil-producing area of ​​Shengli Oilfield. The characteristics of oil and gas migration and accumulation in Shengtuo Oilfield have a great enlightenment effect on oil and gas exploration in the steep slope zone of faulted basins. In the Shengtuo area, 332 oil inclusions in more than 100 glutenite samples were tested with high-resolution and high-precision microbeam fluorescence spectroscopy. Using the fluorescence spectrum test data of each oil inclusion, I was calculated 425 / I 433 , I 425 / I 433 and I 419 / I 429 Fluorescence spectrum intensity ratio parameters, and calculated the crude oil maturity of oil inclusions according to formulas (1)-(3), the average value of the three was taken as the Ro value (%) of oil inclusions, and its histogram was drawn in figure 1 . In the figure, the maturity of oil inclusions in the Shengtuo area can be divided into two subpopulations, and the dist...

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Abstract

The invention relates to a method for determining oil-gas migration and pool-forming periods. According to the method, oil-gas migration and the period of oil-containing gas charging are determined by carrying out high-resolution and high-precision microscopy fluorescence spectrum testing and data analysis on oil inclusions, and the oil-gas pool-forming period is determined by carrying out in-situ high-resolution and high-precision microscopy fluorescence spectrum testing and data analysis on porous oil.

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 oil and gas generated by source rocks migrate into the carrier (reservoir, unconformity, fault) for the first time, and then migrate into the trap for the second time in the carrier to enrich and form oil and gas reservoirs. The stages of secondary migration (hydrocarbon charging) and accumulation, especially the key migration and accumulation periods, are very important for oil and gas exploration. So far, people mainly use the age data of mineral formation such as brine inclusions and illite dating to indirectly infer the stages of oil and gas migration, and also use the migration stages as accumulation stages. The basis is that after oil and gas are injected into the reservoir, it will prevent the growth of minerals. The stagnant growth period of these minerals is regarded as the oil and gas ...

Claims

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Application Information

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