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Oil shale reservoir in-situ heating transformation evaluation method and device based on microseismic parameters

An evaluation method, oil shale technology, applied in the fields of earthwork drilling, electrical digital data processing, special data processing applications, etc., can solve the problem of no reference standard for high temperature induced fractures

Active Publication Date: 2019-08-02
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, based on the microseismic monitoring signals of high-temperature oil shale, there is currently no reference standard for how to determine the generation and expansion of high-temperature induced fractures

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  • Oil shale reservoir in-situ heating transformation evaluation method and device based on microseismic parameters
  • Oil shale reservoir in-situ heating transformation evaluation method and device based on microseismic parameters
  • Oil shale reservoir in-situ heating transformation evaluation method and device based on microseismic parameters

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Embodiment Construction

[0044]The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted", "connect...

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Abstract

The invention discloses an oil shale reservoir in-situ heating reconstruction evaluation method and device based on microseismic parameters. The method comprises the steps: determining the scale information of cracks based on the frequency change of microseismic signals, determining the energy of the microseismic signals, and describing the energy dissipation rules of cracks with different scales;determining an empirical constant b according to the magnitude of the microseismic signals and the number of accumulated events; identifying a characteristic RA critical value and a received microseismic signal longitudinal / transverse wave amplitude and amplitude occurrence time based on a rock fracture mechanism determined by an experiment, and judging the fracture mechanism of the oil shale; and identifying a target microseismic signal based on the scale information, the energy, the b value and the RA value of the cracks, and determining the safety of the oil shale reservoir based on the target microseismic signal and the position of the target microseismic signal. According to the method, the safety and the transformation effect of the oil shale reservoir can be integrally evaluated.

Description

technical field [0001] The invention relates to the technical field of real-time monitoring of reservoir fractures during in-situ heating and reforming of oil shale reservoirs, in particular to an evaluation method and device for in-situ heating and reforming of oil shale reservoirs based on microseismic parameters. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] With the gradual reduction of conventional oil and gas reserves, the development of unconventional oil and gas resources has received extensive attention. Among them, oil shale, as a kind of unconventional oil and gas resources, is expected to become an important strategic energy source because of its huge reserves. [0004] The key to the development of oil shale is to transform the kerogen in it into liquid and gas under high temperature conditions, that is, shale oil and mixed hydrocarbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/26E21B43/241G06F17/50
CPCE21B49/00E21B43/26E21B43/241G06F30/20
Inventor 张广清邱羽帆邢岳堃
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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