Method and device for analyzing brittle cover layer closeness of fault block entrapment

A sealing, capping technology, applied in complex mathematical operations, design optimization/simulation, special data processing applications, etc., can solve the problem of low sealing analysis accuracy, inability to express changes in the sealing ability of caps, and inability to respond intuitively Problems such as differences in sealing of brittle caprocks

Active Publication Date: 2020-09-18
PETROCHINA CO LTD
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Problems solved by technology

For the caprock in the ductile stage, it generally has the sealing ability on the fracture surface; for the caprock in the brittle-ductile transition stage, the mudstone smear factor is used to evaluate the extent of the argillaceous caprock being damaged by fracture; for the brittle stage For cap rocks, the disconnected thickness method is usually used, but the representation of this method is based on a large number of drilling statistics charts

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  • Method and device for analyzing brittle cover layer closeness of fault block entrapment
  • Method and device for analyzing brittle cover layer closeness of fault block entrapment
  • Method and device for analyzing brittle cover layer closeness of fault block entrapment

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[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, 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.

[0023] In the description of this specification, the words "comprising", "comprising", "having", "containing" and so on are all open terms, meaning including but not limited to. A description referring to the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one of the present application. Examples or examples. In this specification, schematic representations of the above terms do not ne...

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Abstract

The invention provides a method and device for analyzing the brittle cover layer closeness of a fault block entrapment, and the method comprises the steps: building a fault model of a target brittle cover layer section in a brittle cover layer section of a fault block entrapment of a sand-mudstone interbed stratum, and determining the lithological attributes of each layer section in the fault model; according to a preset sandstone filtering window size and the lithology attribute of each layer section, determining a calculation mode of a cover layer sealing factor of each layer section, and based on the calculation mode, calculating the cover layer sealing factor of each layer section; and according to the capping layer sealing factor of each layer section and the target brittle capping layer section sealing factor threshold value, achieving capping layer sealing performance analysis of the target brittle capping layer section on the section. The method and device can analyze the sealing performance of the brittle cover layer on the section, and are high in accuracy.

Description

technical field [0001] The invention relates to the field of seismic exploration, in particular to a method and device for analyzing the sealing performance of brittle cap rocks trapped by fault blocks. Background technique [0002] In the exploration of fault-block oil and gas reservoirs, it is one of the important elements to analyze the damage degree of faults to cap rocks. The failure mechanism of faults to cap rocks with different brittle toughness is quite different, resulting in different capabilities of vertical damage to cap rocks after combination of faults and cap rocks. , different evaluation methods should be adopted for different brittle and ductile caprocks. For the caprock in the ductile stage, it generally has the sealing ability on the fracture surface; for the caprock in the brittle-ductile transition stage, the mudstone smear factor is used to evaluate the extent of the argillaceous caprock being damaged by fracture; for the brittle stage For cap rocks,...

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Application Information

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IPC IPC(8): G06F30/20G06F17/18
CPCG06F30/20G06F17/18
Inventor 苏玉平卫平生陈广坡石兰亭景紫岩王海学孟令东杜睿山王有功马丽娜
Owner PETROCHINA CO LTD
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