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Paleo-heat flow change recovering method and device

A heat flow change, heat flow technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in application

Inactive Publication Date: 2014-02-12
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for recovering paleo-heat flow changes, which are used to solve the problem of limitations of existing models that are difficult to apply to complex geological conditions

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  • Paleo-heat flow change recovering method and device

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention clearer and more specific, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0062] Embodiments of the present invention provide a method for recovering ancient heat flow changes, such as figure 1 As shown, the method includes:

[0063] Step 101, obtaining stratigraphic information of different layers in the research area; here, different layers in the research area are related to the accuracy of acquisition, which can be a relatively large layer series or a more specific rock group unit. The present invention is an example, mainly after selecting layers, and then selecting a plurality of sample points in each layer for subsequent calculation.

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Abstract

The invention provides a paleo-heat flow change recovering method and device. The method comprises the following steps: stratum information of different strata in a survey region is obtained, wherein the stratum information comprises sample depths of all sample points in all the strata, geologic history times, vitrinite reflectance, a current earth surface temperature, a current geothermal gradient, paleogeotemperature of initial sediment, the maximal burial depth of a sediment base, thermal conductivity of all the strata and geologic history times which the sediment goes through; a time-temperature index of all the sample points in each stratum is obtained; a theoretical time-temperature index model of all the sample points in each stratum is established; a paleo-heat flow back-stripping calculation model is established; a palaeogeothermal gradient of each stratum at the time of sedimentation is obtained; according to the obtained palaeogeothermal gradient of each stratum at the time of sedimentation, the paleo-heat flow value of the corresponding stratum is calculated; according to the change trend of the paleo-heat flow value of each stratum over time, different mathematic models are selected for fitting, and a change rule of paleo-heat flow over time is determined. The paleo-heat flow change recovering method can be applied to complicated geological conditions, thereby being better in adaptability and effectiveness.

Description

technical field [0001] The invention relates to the field of geology, in particular to a method and device for recovering ancient heat flow changes. Background technique [0002] The current geothermal field and paleo-heat flow history of a basin are an objective reflection of the structural evolution process of the basin, and are of great significance to the evaluation of source rocks and oil and gas resources in the basin. At present, there are many methods for studying paleo-heat flow changes. Among them, the method proposed by American scholar Lerche I et al. (1984) to recover and calculate paleo-heat-flow changes in formations using vitrinite reflectance data has received special attention and has been widely cited. an effective method. [0003] The magnitude of the time-temperature comprehensive effect can be expressed by the time-temperature index (VTI) and the theoretical time-temperature index (TTI), and the values ​​and meanings of the two are exactly the same. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 庞雄奇郭丰涛姜福杰徐静王友伟郭继刚周立明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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