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Shale graptolite belt division model establishment method and shale graptolite belt division method

A model building and graptolite technology, applied in the field of shale formation division, can solve the problem that the graptolite belt cannot be accurately divided, and achieve the effect of accurate division results

Active Publication Date: 2021-07-27
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0003] However, the existing graptolite zone division method is based on core description and natural gamma ray curve feature division
Graptolite belts with uncored wells and indistinct natural gamma ray curves cannot be accurately divided

Method used

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  • Shale graptolite belt division model establishment method and shale graptolite belt division method
  • Shale graptolite belt division model establishment method and shale graptolite belt division method
  • Shale graptolite belt division model establishment method and shale graptolite belt division method

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Embodiment Construction

[0021] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0023] In this example, based on core observation, the characteristic graptolite belts are divided by characteristic graptolite belts; the logging response characteristics of different graptolite belts are analyzed, and the logging curves sensitive to the graptolite belts are selected; the characteristics of the graptolite belts and each logging curve are established The relation is used as the graptolite zone division model; the graptolite zone is divided for uncored wells by using the graptolite zone division model. This embodiment is especi...

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Abstract

The present application relates to a method for establishing a shale graptolite belt division model and a shale graptolite belt division method, wherein the method for establishing a shale graptolite belt division model includes: performing graptolite on key wells based on the characteristic graptolite of key wells According to the division of the graptolite zone and the position depth of the graptolite zone boundary in the key well, the multiple logging curves of the key well correspond to the position depth of the graptolite zone and the graptolite zone boundary according to the depth; analyze the graptolite zone boundary According to the characteristic changes of multiple well logging curves at the location, multiple well logging curves are selected for the graptolite zone division model; Corresponding to the log curves, the graptolite zone division model is obtained. This shale graptolite zone division method uses this model to delineate the graptolite zones of uncored wells. The division of uncored wells is realized, and the problem that the graptolite belt with inconspicuous natural gamma ray curve characteristics cannot be accurately divided is solved.

Description

technical field [0001] The present application relates to the field of shale stratum division, in particular to a method for establishing a shale graptolite belt division model and a shale graptolite belt division method. Background technique [0002] Shale gas refers to the accumulation of natural gas mainly located in dark mud shale or high-carbon mud shale, mainly in the state of adsorption or free. Determining the main formation series based on the division results of shale formations is the key work of geological research in the early stage of shale gas reservoir development. Graptolite biofossils are developed in marine shale formations, and different types of graptolite organisms correspond to different formation ages. In this way, the iconic graptolite species of the formation can be determined, and the location of the well section can be obtained by observing the graptolite fossils in the core well cores. Strata. [0003] However, the existing graptolite zone divi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V99/00G01V11/00
CPCG01V11/00G01V20/00
Inventor 曾番惠王国勇魏斌王中兴李明波熊小林王楠卢亚亚赵会民
Owner BC P INC CHINA NAT PETROLEUM CORP
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