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A Restoration Method of Porosity Evolution Process in Carbonate Sequence Stratigraphy

An evolution process, carbonate technology, applied in the field of geological exploration, can solve problems that cannot meet the requirements of favorable reservoir prediction for carbonate reservoir quality evaluation

Active Publication Date: 2021-10-08
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

Existing porosity restoration methods often study the porosity evolution of a single reservoir, ignoring the influence of carbonate sequence superposition, which cannot meet the current requirements for quality evaluation and favorable reservoir prediction for carbonate reservoirs

Method used

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  • A Restoration Method of Porosity Evolution Process in Carbonate Sequence Stratigraphy
  • A Restoration Method of Porosity Evolution Process in Carbonate Sequence Stratigraphy
  • A Restoration Method of Porosity Evolution Process in Carbonate Sequence Stratigraphy

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Embodiment 1

[0036] (1) According to figure 1 For the carbonate rocks of the Yingshan Formation in the Shunnan area of ​​the Tarim Basin, through in-depth analysis of geological, geochemical, and geophysical data such as cores, thin sections, and mud logging, the paleoclimate and paleosea level are restored, and the layers are identified in combination with the regional geological background. Sequence interface, establish carbonate sequence stratigraphic framework (such as Figure 11 shown). Among them, the basis for establishing the sequence stratigraphy framework of carbonate rocks is: comprehensive chronostratigraphy, lithostratigraphy and biostratigraphy, combined with field outcrop sections in the study area, drilling coring, sedimentary facies and regional tectonic movement analysis, through the stratigraphic analysis of typical well sections Sequence stratigraphic analysis, combined with the relevant data consulted, sequence boundary calibration on the seismic section. Among them,...

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Abstract

The invention provides a recovery method for the porosity evolution process of carbonate sequence strata. The method comprises: a step of establishing a sequence stratigraphic framework of carbonate rocks; a step of dividing diagenetic stages; simulating the diagenesis in which the thickness of reservoirs is constantly increasing and multiple reservoirs are continuously superimposed during the periodical rise-fall of sea level; Porosity evolution, the steps to obtain the simulation results; use the simulation results as the initial value of the diagenetic evolution process simulation, and simulate the multi-stage diagenetic evolution process experienced by the carbonate rock formation in stages and continuously, and calculate the porosity Steps that evolve over time in space. Compared with the traditional porosity recovery of a single reservoir over time, the method of the present invention fully considers the influence of superposition of multiple overlying reservoirs during the process of reservoir deposition-diagenesis.

Description

technical field [0001] The invention relates to the field of geological exploration, and belongs to the field of diagenesis research of marine carbonate rock reservoirs. More specifically, the invention relates to a recovery method for the porosity evolution process of carbonate rock sequence strata. Background technique [0002] Carbonate reservoirs are rich in oil and gas resources. In recent years, many large-scale carbonate oil and gas fields have been discovered in my country. However, due to the long and complicated diagenetic transformation of carbonate reservoirs, large burial depth and complex pore evolution, the reservoirs have strong heterogeneity. Qualitative, low level of exploration and understanding. The storage capacity of carbonate rock oil and gas resources mainly depends on the development of its pores. Therefore, determining the porosity evolution and distribution of carbonate rock formations can more effectively evaluate favorable reservoirs and guide th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/088G01N33/241G01V99/005G01N2015/0846
Inventor 杨磊磊陈冬华魏国胡静赵伟全刘可禹刘建良杨威唐相路赖锦
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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