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Evaluation method and device for in-situ heating stimulation of oil shale reservoirs based on microseismic parameters

An evaluation method and oil shale technology, applied in the fields of earthwork drilling, wellbore/well components, design optimization/simulation, etc., can solve the problem of high temperature induced fractures without reference standards and so on

Active Publication Date: 2020-09-18
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

Method used

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  • Evaluation method and device for in-situ heating stimulation of oil shale reservoirs based on microseismic parameters
  • Evaluation method and device for in-situ heating stimulation of oil shale reservoirs based on microseismic parameters
  • Evaluation method and device for in-situ heating stimulation of oil shale reservoirs 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 a method and device for in-situ heating and reformation evaluation of oil shale reservoirs based on microseismic parameters. The method includes: determining the scale information of fractures based on the frequency change of microseismic signals, and determining the energy of microseismic signals to describe fractures of different scales According to the magnitude of the microseismic signal and the cumulative number of events, the empirical constant b is determined; based on the rock fracture mechanism identification characteristic RA critical value determined by the test, the received microseismic signal longitudinal / shear wave amplitude and the amplitude occurrence time, Identify the fracture mechanism of oil shale; identify the target microseismic signal based on the fracture scale information, energy size, b value and RA value, and determine the oil shale reservoir safety based on the target microseismic signal and its location. The invention can conduct overall evaluation on the safety and reforming effect of the oil shale reservoir.

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 Patents(China)
IPC IPC(8): E21B49/00E21B43/26E21B43/241G06F30/20
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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