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Carbonate deposition numerical simulation method

A numerical simulation, carbonate technology, applied in the field of numerical simulation of carbonate deposition, can solve the problems of low-carbonate rock deposition algorithm research, no feasibility analysis, etc., to achieve the effect of cost saving

Active Publication Date: 2018-01-19
YANGTZE UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

There are also different understandings of the origin of carbonic acid. In the study of carbonate rocks, few people have studied the depositional algorithms of carbonate rocks, and no feasibility analysis has been conducted.

Method used

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  • Carbonate deposition numerical simulation method

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Experimental program
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Effect test

Embodiment 1

[0049] like figure 1 As shown, a numerical simulation method for carbonate deposition includes the following steps:

[0050] 1) According to the logging and seismic geological data in the study area, the sedimentary sequence in the reservoir is obtained by analysis, and the phase parameters of the model in the boundary conditions of the numerical simulation are obtained;

[0051] 2) According to the sampling or core data in the study area, analyze the density of the rock sample, and analyze the composition of the rock sample to obtain the chemical composition and structural data of the sedimentary components, and provide the physical parameters of the sediment for numerical simulation;

[0052] 3) Starting from the sedimentary dynamic characteristics of sedimentary carbonate rocks, carry out sedimentological investigation and research, establish a water quality model to determine the geological structure characteristics of sedimentary carbonate rocks in the study area, and obt...

Embodiment 2

[0068] A kind of carbonate deposition numerical simulation method, the method of this embodiment is basically the same as embodiment 1, and the difference is:

[0069] The formation methods of carbonate rocks include biochemical deposition and chemical deposition, according to the following biochemical deposition deposition amount m 生 and the deposition amount m of chemical precipitation 化 Calculate and sum to get the total sediment volume m 总 ;

[0070] Conditional constraints are adopted for biochemical origin. On the basis of the dynamic simulation of the depositional environment in step 2), according to the conditional analysis of biogenesis, the growth rate of biogenic carbonate rocks is calculated to obtain biochemically derived carbonic acid. Deposits of salt deposits; calculation

[0071] The deposition formula is as follows:

[0072] m 生 =a 1 C co2 *bH*cT

[0073] where m 生 The amount of sedimentary carbonate deposits of biochemical origin;

[0074] C co2 f...

Embodiment 3

[0085] A kind of carbonate deposition numerical simulation method, the method of this embodiment is basically the same as embodiment 1, and the difference is:

[0086] The formation methods of carbonate rocks include biochemical sedimentation, chemical sedimentation, and mechanical damage and re-subsidence of carbonate rocks. According to the following biochemical sedimentation deposition amount m 生 , the deposition volume of chemical sedimentation m 化 and mechanical damage re-sedimentation deposition volume m 机械 Calculate and sum to get the total sediment volume m 总

[0087] Conditional constraints are adopted for biochemical origin. On the basis of the dynamic simulation of the depositional environment in step 2), according to the conditional analysis of biogenesis, the growth rate of biogenic carbonate rocks is calculated to obtain biochemically derived carbonic acid. Deposits of salt deposits; calculation

[0088] The deposition formula is as follows:

[0089] m 生 =a...

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Abstract

The invention discloses a carbonate deposition numerical simulation method. The method comprises the following steps of: meshing a research area to obtain a water quality model of the research area; summating deposition amounts m of different carbonate rock deposition processes to obtain a total deposition amount m of carbonate rock deposits; calculating a total volume v of the deposits accordingto the total deposition amount m of the deposits and a density rock Rho=m / v of rocks; calculating a thickness of the deposits according to the size of the mesh according to the total volume v of the deposits, overlapping the thickness of the deposit to an initial bottom shape to obtain change of the bottom shape, and taking the changed bottom shape as a deposition bottom shape of the next moment;and until the simulation is finished, quantitatively representing the carbonate rock deposition process of the research area so as to obtain a deposition process model of carbonate rocks in depositionareas. According to the method, deposition environments under different environmental conditions are sufficiently considered, a deposition manner of the carbonate rocks is clear, and a mathematic calculation manner is used for simulating the deposition process of the carbonate rocks; and through the mathematic calculation, the cost can be saved and debugging can be carried out repeatedly.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a numerical simulation method for carbonate deposition. Background technique [0002] In traditional geological research, carbonate, as an important oil reservoir, has important research significance for oil exploration and development. There are also different understandings of the origin of carbonic acid. In the study of carbonate rocks, few people have studied the deposition algorithm of carbonate rocks, and no feasibility analysis has been carried out. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a carbonate deposition numerical simulation method based on the research and analysis of the depositional conditions of carbonate rocks, combined with the deposition numerical simulation method, which fully considers the diagenetic environment of the depositional area. Quantitative description of the depositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02A20/152
Inventor 张昌民宋亚开杨威尹太举曾灿严秀瑾崔智博
Owner YANGTZE UNIVERSITY
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