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Method for establishing initial model based on multi-well stratum conformation factors

An initial model and factor technology, applied in geographic modeling, geophysical measurement, seismic signal processing, etc., can solve problems such as poor applicability

Active Publication Date: 2017-10-20
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, at present, this method only establishes a model based on a single well, and the applicability of this method is not strong in work areas with complex geological structures

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  • Method for establishing initial model based on multi-well stratum conformation factors
  • Method for establishing initial model based on multi-well stratum conformation factors
  • Method for establishing initial model based on multi-well stratum conformation factors

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Embodiment Construction

[0049] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0050]At present, seismic information is the main body and well information is the condition. Geological models with reservoir spatial variation characteristics can only be established by relying on single wells. The present invention improves the current method of establishing a geological model with reservoir space variation characteristics based on a single well, and introduces multi-well data by adopting a normalization algorithm to dist...

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Abstract

The invention provides a method for establishing an initial model based on multi-well stratum conformation factors. The method includes the steps of making synthesized earthquake record for each well, extracting wavelets, and calibrating layer position, solving the matching factors between well side seismic channel and logging longitudinal wave impedance, lateral wave impedance and density, obtaining stratum conformation factors, calculating the point to point distance between the earthquake record position to be solved and the positions of various well points, distributing the weight of point to point distance between the earthquake record position to be solved and the positions of various well points, applying the obtained matching factors, the stratum conformation factors and the weight coefficient to each earthquake record, and establishing the initial model of the earthquake record. Through the method, the initial model that is accurate and can satisfies the needs of real work areas can be established when the work areas are large, the number of wells is great, and the structural change of the work area is great.

Description

technical field [0001] The invention belongs to the field of geophysical exploration in the petrochemical industry, in particular, the invention relates to a method for establishing an initial model based on multi-well formation transformation factors. Background technique [0002] At present, the methods of establishing initial geological models at home and abroad are mainly based on interpolation algorithms, such as inverse distance weighting and kriging. The inversion result strongly depends on the initial model. If the initial model is not suitable, not only the convergence speed is slow, but also the number of iterations is large. At the same time, the convergence result may be far from the actual model. The method of establishing an initial geological model based on an interpolation algorithm has one thing in common, that is, in the case of few well data, the "bull's eye" phenomenon will inevitably appear; while under the condition of a single well, the initial geologi...

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Application Information

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IPC IPC(8): G01V1/28G01V99/00
CPCG01V1/28G01V20/00
Inventor 周单林正良须振华滕龙
Owner CHINA PETROLEUM & CHEM CORP
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