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Hydrocarbon expulsion efficiency calculation method and system for hydrocarbon source rock based on pyrolysis parameter diagram format

An efficient calculation and source rock technology, applied in the field of oil and gas resource evaluation and analysis, to achieve the effect of reasonable parameter acquisition and simple calculation process

Active Publication Date: 2020-12-01
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

Among them, although the hydrocarbon generation potential method and the original hydrocarbon generation potential recovery method have an obvious advantage: the calculation is based on the easily obtained rock pyrolysis and TOC analysis data, but they also have a prominent disadvantage: the original organic matter of a type Hydrocarbon generation potential only takes one value, and it is assigned by human

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  • Hydrocarbon expulsion efficiency calculation method and system for hydrocarbon source rock based on pyrolysis parameter diagram format
  • Hydrocarbon expulsion efficiency calculation method and system for hydrocarbon source rock based on pyrolysis parameter diagram format
  • Hydrocarbon expulsion efficiency calculation method and system for hydrocarbon source rock based on pyrolysis parameter diagram format

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[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Embodiments of the present invention provide a method and system for calculating the hydrocarbon expulsion efficiency of source rocks based on the pyrolysis parameter map format.

[0040] Please refer to figure 1 , figure 1 It is a flow chart of a method for calculating the hydrocarbon expulsion efficiency of source rocks based on the layout of the pyrolysis parameter diagram in an embodiment of the present invention, specifically including the following steps:

[0041] S101: Perform pyrolysis analysis and organic carbon analysis on rock samples, and obtain parameters: current hydrogen index HI, maximum pyrolysis peak temperature T max , Residual hydrocarbon content S 1 , Potential hydrocarbon content S 2 and o...

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Abstract

The invention provides a hydrocarbon source rock hydrocarbon expulsion efficiency calculation method and system based on a pyrolysis parameter diagram format. The method comprises the steps: firstly carrying out the pyrolysis and organic carbon analysis of a rock sample, and obtaining a current hydrogen index HI and a maximum pyrolysis peak temperature Tmax; further interpolating and subdividing an organic matter type boundary and a maturity trend line of the classic pyrolysis plate to obtain a subdivided pyrolysis plate; marking a data point consisting of HI and Tmax, and taking an ordinate value corresponding to an intersection point of an organic matter type line passing through the data point and a maturity line of which Ro is 0.2% as an original hydrogen index of the sample; and finally calculating the hydrocarbon expulsion efficiency according to the original hydrogen index. According to the method, the hydrocarbon expulsion efficiency of the hydrocarbon source rock can be simplyand accurately calculated; the original hydrogen index collection is relatively reasonable, and the calculation process is simple. Compared with a manual assignment method, the method has the advantages that the phenomena of negative values and hydrocarbon expulsion efficiency greater than 100% do not occur in the calculation process and result.

Description

technical field [0001] The invention relates to the technical field of oil and gas resource evaluation and analysis, in particular to a method and system for calculating the hydrocarbon expulsion efficiency of source rocks based on a pyrolysis parameter map format. Background technique [0002] Hydrocarbon expulsion refers to the initial migration of oil and gas, that is, the process of hydrocarbons migrating from source rocks to reservoir rocks. It is one of the important geological processes in the process of oil and gas accumulation, and it is also an important link. Hydrocarbon expulsion efficiency is a key geological parameter in hydrocarbon expulsion research, and has attracted much attention. The level of hydrocarbon expulsion efficiency not only affects the accumulation of conventional oil and gas, but also affects the degree of enrichment of unconventional oil and gas, which is the key to the evaluation of conventional and unconventional oil and gas resources. The...

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Application Information

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IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 李水福张冬梅张延延胡守志
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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