A fine identification method for dominant lithology of shale oil

Abstract

The invention discloses a method for finely identifying the dominant lithology of shale oil. According to the X-ray diffraction mineral composition data of shale interval cuttings or core samples, three main mineral components are selected to establish a chart, so as to realize the fine division of shale lithology. ; According to gas logging parameters, rock pyrolysis analysis, and brittleness index data, the shale formation dominant lithology classification standard is established; the present invention uses X-ray diffraction mineral composition data to establish a chart to distinguish lithology, and combines gas logging parameters, rock thermal Using solution analysis and brittleness index data to identify the dominant lithology of shale formations, it firstly solves the problem of shale oil lithology ambiguity, and can accurately identify lithology. The superior lithology data in the study met the needs of engineering services and provided a reliable basis for the efficient development of oil and gas resources in shale formations.

Description

technical field [0001] The invention relates to unconventional oil and gas exploration and development technology, in particular to a method for finely identifying dominant lithology of shale oil. Background technique [0002] At present, there are many lithology identification methods for mud logging, which play an important role in rock naming and geological stratification. However, some of these methods are artificial macroscopic identification or microscopic identification under a microscope. Pure mineral composition identification can hardly meet the requirements of shale formations. The need for fine identification of lithology makes shale oil lithology classification unclear and name inaccurate. [0003] The dominant lithology in shale formations refers to rocks with better oil and gas shows, richer organic matter and movable hydrocarbon content, better reservoir quality, more brittle mineral content, and easier to undergo fracturing engineering reformation. In the p...

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Problems solved by technology

[0002] At present, there are many lithology identification methods for mud logging, which play an important role in rock naming and geological stratification. However, some of these methods are artificial macroscopic identification or microscopic identification under a microscope. The simple identification of mineral components can hardly meet the requirements of shale formations. The need for fine lithology identification makes shale oil lithology classification unclear and name inaccurate

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