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Representation method of oil-gas exploration and oil-gas reservoir by taking vital bacterium abnormality and dead bacterium abnormality of methane-oxidizing bacteria as indicators

A technology for methane-oxidizing bacteria and oil and gas reservoirs, applied in the fields of oil and gas exploration and oil and gas reservoir characterization, can solve problems such as increased cost, inability to evaluate, and compare, and achieve the effects of ensuring counting accuracy, improving measurement efficiency, and avoiding randomness.

Active Publication Date: 2013-02-27
GUANGZHOU ENENTA CHEM SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, when the existing technology only uses the abnormality of live bacteria of methane oxidizing bacteria as the microbial exploration index to carry out oil and gas exploration, it is not only possible not to find those micro-fractures in the exploration area that are in the squeezed state (but actually the oil and gas exploration section). potential targets), and it is also impossible to evaluate in which areas the total flux of micro-leakage methane in the exploration area is high and which areas are low in the whole process of oil and gas generation, storage, migration, and preservation.
[0011](2) Since the existing technology can only obtain the microbial exploration index of abnormal viable methane oxidizing bacteria from the surface soil and / or sediments of the exploration area, so Existing technologies cannot be used to investigate the history and evolution of methane micro-leakage in oil and gas exploration areas
The inevitable result of this requirement on the one hand leads to a significant increase in sampling costs, especially for the characterization of marine oil and gas reservoirs, and the cost increase will be more significant; In fact, it cannot be implemented immediately in the production area, because most of the oil and gas reservoirs today have not carried out microbial oil and gas reservoir characterization work. The number of viable bacteria cannot immediately give the microbial characterization results of the oil and gas reservoir, but must wait for a long period of time (at least half a year; if the time is too short, it is difficult to reflect the number of viable bacteria in the methane oxidizing bacteria between two time points. After the second sampling and obtaining the number of viable methanotrophs, meaningful reservoir characterization results can be obtained
[0014](5) It is impossible to compare the current situation of oil and gas reservoir exploitation with the situation before oil and gas reservoir exploitation, thus restricting our estimation of the remaining oil and gas resources and the amount of exploitation It is not conducive to the deployment of adjustment wells and the formulation of efficient production plans in the production areas of oil and gas reservoirs in the middle and later stages
[0015](6) The grid layout of sampling points, sampling depth, sampling volume, sample packaging and sample storage conditions lack specific information suitable for oil and gas exploration and reservoir characterization. plan

Method used

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  • Representation method of oil-gas exploration and oil-gas reservoir by taking vital bacterium abnormality and dead bacterium abnormality of methane-oxidizing bacteria as indicators
  • Representation method of oil-gas exploration and oil-gas reservoir by taking vital bacterium abnormality and dead bacterium abnormality of methane-oxidizing bacteria as indicators
  • Representation method of oil-gas exploration and oil-gas reservoir by taking vital bacterium abnormality and dead bacterium abnormality of methane-oxidizing bacteria as indicators

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Experimental program
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Effect test

Embodiment 1

[0056] The area involved in embodiment 1 is an oil and gas reservoir area under development (such as figure 1 and figure 2 shown), it can not only carry out microbial oil and gas exploration, but also carry out oil and gas reservoir characterization. The method comprises the following specific steps:

[0057] 1. According to the spatial size of oil and gas basins, trap structures and oil and gas reservoirs, the thickness of source rocks, the characteristics of soil and / or sediments above oil and gas exploration areas or oil and gas reservoirs, and the precision requirements for oil and gas exploration and oil and gas reservoir characterization, in In the selected exploration or characterization area, the selected grid size is 150 m ~ 250 m×150 m ~ 250 m ( figure 1 and figure 2 ).

[0058] 2. According to the characteristics of soil and / or sediments above oil and gas basins and oil and gas reservoirs, the characteristics of biological populations in soil and / or sediments,...

Embodiment 2

[0075] The exploration area involved in embodiment 2 is an unknown exploration area (such as image 3 and Figure 4 shown), but geological exploration and seismic exploration studies have been carried out. A new method for microbial oil and gas exploration, the method includes the following specific steps:

[0076] 1. According to the size of oil and gas generation basins and trap structures, the thickness of source rocks, the characteristics of surface soil and / or sediments, the exploration destination and the requirements of exploration precision, in the selected exploration area above the oil and gas generation basins, select The fixed grid degree is 150 m ~ 250 m×150 m ~ 250 m ( image 3 and Figure 4 ).

[0077] 2. According to the characteristics of the soil and / or sediments above the oil and gas basins, the characteristics of the biological populations in the soil and / or sediments, and human activities, the specific sampling depth is determined to be 20 cm to 70 cm ...

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Abstract

The invention discloses a representation method of oil-gas exploration and oil-gas reservoir by taking vital bacterium abnormality and dead bacterium abnormality of methane-oxidizing bacteria as indicators, comprising the following steps: collecting a sample above an oil-gas exploration and oil-gas reservoir representation area according to the specific grid degree, the sampling depth and the sampling amount, packaging and saving the sample according to the specific condition; adopting a conventional microorganism counting method to obtain the vital bacterium quantity and the dead bacterium quantity of the methane-oxidizing bacteria in the sample; drawing an equal bacterium line of the vital bacteria and an equal bacterium line of the dead bacteria on a map, a topographic map, a geologic map or a topography-geologic map to obtain the vital bacterium abnormality and the dead bacterium abnormality; comprehensively comparing the vital bacterium abnormality and the dead bacterium abnormality; and estimating and predicting the underground oil-gas resource condition of the oil-gas exploration and oil-gas reservoir representation area, or extracting an exploitation scheme of the oil-gas reservoir according to the characteristics of the vital bacterium abnormality and the dead bacterium abnormality and the differences of the vital bacterium abnormality and the dead bacterium abnormality, and combining the results of geological exploration, geochemical exploration and geophysical exploration.

Description

technical field [0001] The invention relates to a method for oil and gas exploration and oil and gas reservoir characterization. Background technique [0002] Oil and gas reservoirs, including oil reservoirs, natural gas reservoirs, oil + natural gas reservoirs and gas hydrate reservoirs. [0003] The oil and gas industry is an important basic energy industry. The urgent problem to be solved in the current exploration and development of oil and natural gas (including gas hydrate) is how to improve the efficiency of exploration and development; the key to solving the above problems is to develop and apply efficient exploration and development methods and technical means. [0004] Microbial oil and gas exploration and oil and gas reservoir characterization technology is an important branch of oil and gas exploration and oil and gas reservoir characterization technology. It is an important technical means to predict and monitor the development of oil and gas reservoirs, the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12Q1/64C12Q1/68C12Q1/06
Inventor 王江海吴酬飞袁建平许红吕宝凤郑贵洲郑新宁刘权燕腾鹏徐小明彭娟徐小燕
Owner GUANGZHOU ENENTA CHEM SCI & TECH
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