Method for updating stratigraphic model of sedimentary basin based on measurements

A stratigraphic model, stratigraphic technology, applied in the field of geothermal energy or underground energy storage, depositional process modeling

Inactive Publication Date: 2021-06-18
INST FR DU PETROLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] Finally, the challenge of comparing discrete data such as facies also arises

Method used

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  • Method for updating stratigraphic model of sedimentary basin based on measurements
  • Method for updating stratigraphic model of sedimentary basin based on measurements
  • Method for updating stratigraphic model of sedimentary basin based on measurements

Examples

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example 1

[0157] A first application example involves sedimentary modeling of basins formed by progradation of a delta. Figure 5 A representation of the basin constructed from seismic and log measurements taken in three wells W1, W2, W3 is shown. Analysis of the measurements performed in the basin further allows to determine the supply of sediment in this basin via the source whose position and direction are shown by arrows. The sediments provided by this source included sand S and clay C, and the reference stratigraphic model constructed from the measurements included sandstone S, siltstone Si, and clay C.

[0158] Implementing the method according to the first aspect of the invention allows in Figure 5 The most probable phase distribution is reproduced in each column of the representation of , and the phase sequence observed in the three vertical wells W1, W2, and W3. Phases are discrete properties that are classified by assigning numerical values ​​to each phase type. The seven ...

example 2

[0161] A second application example involves sedimentary modeling of basins formed by turbidite systems. Figure 8 A representation of the basin constructed from the seismic and log measurements is shown at the top. More precisely, Figure 8 The distribution of the sand fraction SC in the basin is shown at the top. The analysis of the measurements performed in the basin further allows to determine the sediment supply in this basin via two sources whose position and direction are shown by the two arrows in the drawing. Sediments supplied by these sources include sand and clay.

[0162] Implementing the method according to the first aspect of the invention allows to reproduce the mean sand distribution SC in each column of the reference model, which is Figure 8 shown at the bottom. The four input parameters of the stratigraphic simulation are considered uncertain and therefore need to be updated by taking into account measurements performed in the basin. These uncertain pa...

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Abstract

The present invention relates to a method for updating a stratigraphic model according to measurements performed in a basin. The method comprises steps of: i) determining at least a first spatial distribution of the values of an attribute representative of the basin stratigraphy, and applying a classification method for converting the first spatial distribution to a first classified image; ii) performing a stratigraphic simulation with first parameter values of the simulation, deducing therefrom a second spatial distribution of the values of the attribute and applying the same classification method identically to determine a second classified image; iii) determining a distribution of local dissimilarities between the first and second classified images, and modifying the values of at least one of the stratigraphic simulation parameters to minimize an objective function formed from at least the local dissimilarity distribution; and iv) updating the stratigraphic model by performing at least one stratigraphic simulation with the modified simulation parameter values.

Description

technical field [0001] The present invention relates to the field of exploration and exploitation of oil or geological gas reservoir sites. The invention also relates to the field of new energy sources, such as geothermal energy or underground energy storage. In general, the present invention can be used in any field where it is desired to characterize the geometry and properties of the sedimentary rocks that make up the subsoil. [0002] Petroleum exploration is the search for oil and gas reservoirs within sedimentary basins. Understanding the principles of hydrocarbon genesis and its connection to the subsurface geological history has allowed the development of methods for assessing the hydrocarbon potential of sedimentary basins. A general procedure for assessing the hydrocarbon potential of a sedimentary basin includes predictions of the hydrocarbon potential of a sedimentary basin based on measured data (e.g., outcrop analysis, seismic surveys, drilling data) associated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/48G01V1/50G06K9/62G06T17/05
CPCG01V99/005G06V10/761G01V1/306G01V1/282G01V1/48G01V1/50G06T17/05G06F18/231G06F18/241G01V2210/661G06F30/20
Inventor I·马林努斯卡娅P·拉索洛福萨恩V·杰维斯-库普特D·格兰真
Owner INST FR DU PETROLE
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