Oil-gas field on-site while-drilling cuttings scanning system and method

Abstract

The invention mainly belongs to the field of oil and gas exploration and development, and particularly relates to an oil-gas field on-site while-drilling cuttings scanning system and method. The oil-gas field on-site while-drilling cuttings scanning system comprises a sample preparation mould and a table-type mineral analysis scanning electron microscope; oil-gas field on-site while-drilling cuttings are prepared to a scanning sample through the sample preparation mould; the table-type mineral analysis scanning electron microscope comprises a secondary electronic probe, a backscattered electron probe, an energy spectrum probe and an electron microscope operation module; and the table-type mineral analysis scanning electron microscope is small in weight, small in land occupation, easy to carry and is suitable for the severe environment in a well field. According to an oil-gas field on-site while-drilling cuttings scanning method, the on-site while-drilling cuttings are fully utilized, mineral elements, mineral types and rock structures are rapidly analyzed, and lithology classification is quickly conducted; and the oil-gas field on-site while-drilling cuttings scanning method has the advantage of on-site real-time guidance drilling and oil-gas field exploration and development, limitation that a laboratory traditional mineral analysis electron microscope scanning system cannot be carried to the site for application is overcome, and the oil-gas field exploration precision and speed are improved.

Description

technical field [0001] The invention mainly belongs to the field of petroleum and natural gas exploration and development, and in particular relates to a cuttings scanning system and method while drilling in an oil and gas field. Background technique [0002] In recent years, with the deepening of oil and gas exploration, unconventional oil and gas such as shale oil and gas and tight oil and gas have attracted more and more attention at home and abroad, and have become the key to changing the global oil and energy pattern. my country's unconventional oil and gas is developing rapidly, and the commercial exploitation of tight oil and gas and shale oil and gas is becoming more and more mature, accounting for an increasing proportion of oil resources. It is of great significance to accelerate the exploration and development of unconventional oil and gas. Unconventional oil and gas reservoirs are very tight, requiring explorers to go deep from the conventional scale to the micro...

AI Technical Summary

Problems solved by technology

[0004] The existing problems are: on the one hand, the cost of collecting rock cores is high; on the other hand, in the existing test methods, the sample preparation is complicated, the instrument is heavy and inconvenient to carry, the instrument cannot adapt to the field test environment, and the batch test is expensive

[0005] At the same time, at the field drilling site, the minerals, elements and pore structure of the reservoir are mainly analyzed by portable testing instruments such as mud logging technology, well logging technology, XRD and XRF. It has the advantages of strong performance, fast test speed, and real-time guidance of on-site work, but the accuracy of field tests is relatively rough, and it needs to be combined with human judgment to guide on-site work.

[0006] The above methods have specific advantages, but they also have their own limitations. It is necessary to meet the requirements of simple sample preparation, easy handling of test instruments, suitable for harsh environments on well sites, high test accuracy, and rapid quantitative analysis of rock surface structure on site. , mineral elements and mineral types, with scanning systems and technical methods for on-site real-time guidance of drilling and exploration and development of oil and gas fields

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