Method for implementing oil-gas exploration and oil-gas reservoir characterization by using living bacteria anomaly and total bacteria anomaly of methylosinus trichosporium as indexes

Abstract

The invention discloses a method for implementing oil-gas exploration and oil-gas reservoir characterization by using living bacteria exception and total bacteria exception of methylosinus trichosporium as indexes. The method comprises the following steps of: acquiring a sample above an oil-gas exploration and oil-gas reservoir characterization area according to the specific grid degree, sampling depth and sampling quantity, and packing and storing the sample according to the specific conditions; simultaneously acquiring the living bacteria number and the total bacteria number of the methylosinus trichosporium in the sample by adopting a conventional microbe counting method, and drawing an equal living bacteria line and an equal total bacteria line on a map, a topographic map, a geologic map or a topographic-geologic map to obtain the living bacteria exception and the total bacteria exception; comprehensively comparing the living bacteria exception with the total bacteria exception; making a judgment and a prediction or providing an oil-gas reservoir exploitation scheme for the underground oil-gas resource condition of the oil-gas exploration and oil-gas reservoir characterization area according to the characteristics, similarities and differences of the living bacteria exception and the total bacteria exception by combining the results of geologic 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...

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

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