Method and device for interpreting oil field water logging layer by using state space model

A state-space model and water-flooded layer technology, applied in the field of logging data interpretation, can solve the problem of inaccurate logging interpretation of water-flooded layers

Active Publication Date: 2017-03-15
PETROCHINA CO LTD
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Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for interpreting water-flooded layers in oilfields using a state-space model to solve the problem of inaccurate logging interpretation of water-flooded layers

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  • Method and device for interpreting oil field water logging layer by using state space model
  • Method and device for interpreting oil field water logging layer by using state space model
  • Method and device for interpreting oil field water logging layer by using state space model

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Embodiment Construction

[0143] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0144] When realizing the present invention, the inventor found that the prior art had the above-mentioned "for the old oil fields that have been developed for a long time by water flooding, the formation water salinity changes greatly between layers and between layers, and there are many curve amplitude information. Under the same situation, the water flooded conditions are very different, which brings great difficulties to the logging interpretation of the wa...

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Abstract

The invention provides a method and device for interpreting an oil field water logging layer by using a state space model, and relates to the technical field of logging data interpretation. The method includes: performing basic interpretation unit division on an oil field whole well segment, and determining basic interpretation unit layer sections; performing initial condition water logging condition determination on the basic interpretation unit layer sections, and forming an initial condition water logging condition determination result; performing target reservoir water logging condition determination on various basic interpretation unit layer sections by using a state space interpretation model according to the initial condition water logging condition determination result, and forming target reservoir water logging condition determination results corresponding to various basic interpretation unit layer sections; and acquiring target reservoir parameters of the basic interpretation unit layer sections by using a dual formation water specific resistance model. The method and device can achieve accurate description of the reservoir water logging condition, can greatly improve the precision of well logging interpretation of a water logging layer, and can meet the demand of oil field development for water logging layer interpretation.

Description

technical field [0001] The invention relates to the technical field of well logging data interpretation, in particular to a method and device for interpreting water-flooded layers in oilfields using a state space model. Background technique [0002] At present, in the field of well logging data interpretation, the method of interpreting water-flooded formations in oilfields by water flooding generally starts with parameter matching, and a dual-formation water resistivity model is established based on the theoretically analyzed macroscopic water-flooding mechanism of water flooding development. The following is a dual-layer water resistivity model: Theoretical and experimental studies show that the pores of argillaceous sandstone are distributed in bimodal distribution, which can be divided into macro pores and micro pores. Macropores allow fluid to flow freely. In the original oil reservoir, oil mainly occupies the macropore space; micropores do not allow fluid flow, and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 温静张新培王玉娟蔡超孟令娜杜文拓陈雪盛聪吕媛媛张晓露
Owner PETROCHINA CO LTD
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