Mud shale pulveryte facies research method

Abstract

The invention provides a mud shale pulveryte facies research method. The mud shale pulveryte facies research method comprises the steps of 1, determining a mud shale pulveryte facies division scheme adopting combination of three elements including rock components, a structure and organic matter content; 2, building a mineral component, organic matter and structure well logging identification model; 3, according to the well logging identification model built in the step 2, performing well logging model identification on a segmented mud shale facies type of a single well in a research area; 4, performing restriction and correction on the mud shale facies type identified by the well logging model; and 5, performing full-area mud shale pulveryte facies identification and distribution law research. The mud shale pulveryte facies research method improves the precision of mud shale pulveryte facies prediction and lays a solid basic theoretical basis for shale oil and gas exploration and development of land facies fault lake basins.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for studying mud shale fine-grained sedimentary lithofacies. Background technique [0002] According to research estimates, fine-grained sedimentary rocks of mud shale account for about 75% of the distribution of various sedimentary rocks in the world. Compared with sand, conglomerate and carbonate rock, the degree of research on shale fine-grained sedimentary rocks is generally low, and there are many problems. Until now, the definition, terminology, classification, formation conditions, and depositional process of shale fine-grained sediments And distribution laws, etc. are still controversial, and even blank in some fields. However, with the global large-scale exploration and development of unconventional oil and gas, fine-grained shale deposition has become a frontier field of geoscience research. Paleogene lacustrine mud shale in faulted basins in ea...

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Problems solved by technology

[0003] Early shale oil exploration practice in continental faulted lake basins in eastern my country shows that shale oil is mainly enriched in some characteristic lithofacies, but fine-grained mud shale deposits in continental faulted lake basins in eastern my country and marine mud The fine-grained shale deposits are different in that there is a mixture of clastic rocks and chemical rocks, complex components, many types of rocks, and rapid phase change. Due to the small particles of fine-grained sediments and complex depositional dynamics, the main controlling factors of deposition and sedimentation The genetic mechanism is not clear, and no favorable lithofacies prediction method has been established, which hinders the exploration of shale oil and gas to a certain extent

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