Method for determining lithogenous phase boundary point of carbonate reservoir stratum

A carbonate reservoir and determination method technology, applied in the determination of carbonate reservoir diagenetic facies boundary point

Active Publication Date: 2018-07-31
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the resolution of seismic data, seismic data has great limitations in the identification of thin carbonate reservoirs and deep carbonate reservoirs

Method used

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  • Method for determining lithogenous phase boundary point of carbonate reservoir stratum
  • Method for determining lithogenous phase boundary point of carbonate reservoir stratum
  • Method for determining lithogenous phase boundary point of carbonate reservoir stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] The method for determining the diagenetic facies boundary point of carbonate reservoirs includes the following steps:

[0093] 1) Collect geological data in the study area, which includes the following:

[0094] ①Study result map of sedimentary facies of the target layer in the study area;

[0095] ②Provenance research results map of the study area;

[0096] ③Research result map of fault distribution in the study area;

[0097] ④ Fluid history (pH) data in the study area;

[0098] ⑤ Diagram of the research results of the diagenetic stage of the target layer in the study area;

[0099] ⑥ Map of the research results of the sedimentary cycle of the target layer in the study area;

[0100] ⑦ Analysis and test data of rock thin sections in the study area.

[0101] 2) Establish the original data database

[0102] The original data database includes carbonate sedimentary facies type database F_m, provenance database O_n, pH database P_o, sedimentary cycle database C_p, d...

Embodiment 2

[0165] As shown in the figure, the carbonate reservoir of the Changxing Formation in the northeast of a province’s basin is analyzed using the method of determining the diagenetic facies boundary point of the carbonate reservoir. The specific method is as follows:

[0166] 1 Collect geological data in the study area

[0167] The geological data of carbonate reservoirs in the Changxing Formation in the northeast of a certain provincial basin were collected, and various types of data were classified according to the classification standard of the original data database. The collected geological data include the following:

[0168] Sedimentary facies map of the study area, provenance map of the study area, cycle map of the study area, acid-base distribution map of the study area, diagenetic stage map of the target layer in the study area, fault index map of the target layer in the study area;

[0169] 2. Determine reservoir properties

[0170] (1) Grid chemical area

[0171] T...

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Abstract

The invention discloses a method for determining a lithogenous phase boundary point of a carbonate reservoir stratum. In the method, with six geological parameters of sedimentary facies, provenance, apH value, sedimentary cycle, diagenetic stages and fault indexes being lithogenous phase type boundary binding conditions of the carbonate reservoir stratum, in combination with mine lithogenous phase data, lithogenous phase transverse distribution is predicted, and the defects in work of research on lithogenous phase transverse prediction in the prior art are overcome. The method determines theeffectiveness of the stratum, and provides bases for reservoir evaluation.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for determining the boundary point of diagenetic facies in carbonate reservoirs. Background technique [0002] Carbonate reservoirs occupy a considerable proportion in the world oil and gas pattern. From a global perspective, carbonate reservoirs account for 20% of sedimentary rocks and more than 50% of proven oil and gas reserves. In my country, with the deepening of marine carbonate oil and gas exploration in recent years, many large and medium-sized oil and gas fields have been discovered in the Bohai Bay, Tarim, Ordos, and Sichuan Basins, demonstrating the huge potential of carbonate rock exploration . Due to the long history of carbonate rock deposition, experienced multiple tectonic movements, strong weathering, denudation and leaching, and strong stratum heterogeneity, the evaluation of carbonate rock reservoirs has become the focu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 钱文蹈尹太举杨威武赛军杨兰夏敏赵晓悦蒋蕾王浩王萌萌
Owner YANGTZE UNIVERSITY
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