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Numerical Simulation Method of Carbonate Sedimentation

A carbonate rock and numerical simulation technology, applied in the field of oil and gas exploration and development, can solve the problems of low-carbonate rock deposition algorithm research and no feasibility analysis, etc., and achieve the effect of saving costs

Active Publication Date: 2021-03-09
YANGTZE UNIVERSITY
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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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  • Numerical Simulation Method of Carbonate Sedimentation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 As shown, a carbonate sedimentation numerical simulation method includes the following steps:

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

[0051] 2) Sampling and collecting core data in the study area, analyzing the density of the rock samples, and analyzing the composition of the rock samples to obtain the chemical composition and structural structure data of the sedimentary components, and provide physical parameters of the sediment for numerical simulation;

[0052] 3) Starting from the sedimentary dynamics 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 stu...

Embodiment 2

[0068] A sedimentation numerical simulation method of carbonate rock, the method of this embodiment is basically the same as that of Embodiment 1, the difference is:

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

[0070] For the biochemical origin, the method of conditional constraints is adopted. On the basis of the dynamic simulation of the depositional environment in step 2), according to the analysis of the biogenic conditions and the growth rate of the biogenic carbonate rock, the carbonic acid of the biochemical origin is calculated. Sedimentary volume of salt rock deposits; calculations

[0071] The deposition formula is as follows:

[0072] m 生 =a 1 C co2 *bH*cT

[0073] where m 生 Deposits of carbonate sediment...

Embodiment 3

[0085] A sedimentation numerical simulation method of carbonate rock, the method of this embodiment is basically the same as that of Embodiment 1, the difference is:

[0086] The formation methods of carbonate rock include biochemical sedimentation, chemical sedimentation and mechanical damage and re-sedimentation of carbonate rock, according to the deposition amount of biochemical sedimentation m 生 , Deposition amount of chemical deposition m 化 and mechanical damage re-sedimentation deposition m 机械 Calculate and sum to obtain the total deposition amount of sediment m 总

[0087] For the biochemical origin, the method of conditional constraints is adopted. On the basis of the dynamic simulation of the depositional environment in step 2), according to the analysis of the biogenic conditions and the growth rate of the biogenic carbonate rock, the carbonic acid of the biochemical origin is calculated. Sedimentary volume of salt rock deposits; calculations

[0088] The depositi...

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Abstract

The invention discloses a numerical simulation method of carbonate deposition. The method grids the network of the research area to obtain the water quality model of the research area; calculates and sums the deposition amount m of different carbonate rock deposition processes to obtain the carbon The total deposition volume of salt rock sediments m 总 ;according to the total sediment deposition m 总 and the density formula ρ=m / v of the rock, calculate the total volume v of the sediment 总 ; from the total volume v of the sediment 总 , calculate the thickness of the sediment according to the size of the grid, and superimpose the thickness of the sediment on the initial floor shape to obtain the change of the floor shape, which will be used as the sedimentary floor shape at the next moment; until the end of the simulation, the carbon in the study area Quantitative characterization of the sedimentary process of carbonate rocks, and a model of the depositional process of carbonate rocks in the depositional area. The invention fully considers the depositional environment under different environmental conditions, clarifies the deposition mode of the carbonate rock, and simulates the deposition process of the carbonate rock by means of mathematical calculation; the mathematical calculation can save cost and be debugged 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 rock 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 depositional algorithms of carbonate rocks, and no feasibility analysis has been conducted. Contents of the invention [0003] The purpose of the present invention is based on the research and analysis of the sedimentary conditions of carbonate rocks, combined with the method of sedimentary numerical simulation, to provide a method for numerical simulation of carbonate rock deposition, which fully considers the diagenetic environment of the depositional area. , quantitatively d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F111/10G06F111/04
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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