Carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination

A technology for carbonate rock reservoirs and carbonate rocks, applied in the field of geophysical exploration, can solve problems such as difficult to distinguish elastic wave impedance, and achieve high precision results

Active Publication Date: 2016-05-18
PETROCHINA CO LTD
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Benefits of technology

This technology allows researchers to study how different types of rocks behave differently when they come into contact or interact therewith during their formation process. By studying these properties, scientists can better identify which type of material was used more frequently than others before it took offshore oil well drilling operations.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the accuracy and efficiency of determining where certain types of rocks may be located within a specific area (geography). Current techniques such as traditional geologic induction analysis can only provide limited depth coverage due to limitations like shallow water basement effects caused by stratification and clay content. However, these techniques cannot accurately identify different rock formations that contain hydrocarbons because they require multiple measurements at varying locations along their length.

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  • Carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination
  • Carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination
  • Carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination

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Embodiment Construction

[0024] figure 1 It is a flow chart of Embodiment 1 of the reservoir inversion method for removing the lateral influence of sedimentary shale on carbonate rocks of the present invention, as shown in figure 1 As shown, the method provided in this embodiment specifically includes:

[0025] Step 101: Carry out petrophysical modeling according to the checked seismic data and corrected logging data, and perform forward modeling on the modeled rock physical model to obtain forward modeling results, which include sedimentary Rock physical elastic characteristics of argillaceous limestone, limestone cave filling argillaceous, pure limestone and reservoirs;

[0026] Step 102, constructing the corresponding relationship between the carbonate sedimentary argillaceous characteristic curve and the elastic impedance according to the petrophysical elastic characteristics of the sedimentary argillaceous limestone in the forward modeling results;

[0027] Step 103 : Generate a carbonate sediment

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Abstract

The invention provides a carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination. The method comprises: according to processed base data, forward rock physical modeling is carried out to obtain a forward modeling result including physical elastic rock characteristics of sedimentary argillaceous limestone, limestone cave filling clay, pure limestone, and the reservoir stratum; on the basis of the physical elastic rock characteristics of the sedimentary argillaceous limestone, a correspondence relation between the carbonatite sedimentary argillaceous characteristics curve and elastic impedance is constructed; according to the correspondence relations, corresponding to wells in a research area, between the carbonatite sedimentary argillaceous characteristics curves and elastic impedances, a carbonatite sedimentary argillaceous background impedance body is generated; geostatistics inversion is carried out based on the processed base data to obtain a carbonatite reservoir stratum impedance body; and the carbonatite reservoir stratum impedance body and the carbonatite sedimentary argillaceous background impedance body are coupled to obtain a carbonatite reservoir stratum inversion result with transverse sedimentary argillaceous changing influence elimination. Therefore, the predicted reservoir stratum and the actual reservoir stratum match each other; and the precision is high.

Description

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Claims

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Application Information

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Owner PETROCHINA CO LTD
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