Log multi-parameter oil-gas interpretation method based on radar map and cloud model

Abstract

The invention relates to a log multi-parameter oil-gas layer interpretation and evaluation method based on a radar map and a cloud model. The method comprises the steps of: obtaining interpretation and evaluation parameters by normal geological log, gas log, geochemical log, nuclear magnetic log and the like; integrating log interpretation databases; drawing the log multi-parameter oil-gas interpretation radar map according to different reservoir types in different areas by using the databases; and mapping the interpretation parameters onto the rays of the radar map. The radar map is divided into a good reservoir, a medium reservoir and a poor reservoir from inside to outside; the area of the radar map is taken as the characteristic quantity for finishing characteristic extraction; the area of the radar map is used to calculate a cloud boundary equation, and the cloud boundary equation is mapped on the manufactured cloud scale; the cloud model is the same as the radar map, namely the reservoir is divided into a dry layer area, a low-yield oil-gas layer area and an oil-gas layer area with industrial value from inside to outside. The intuitional and quantitative interpretation and evaluation of log multi-parameter oil-gas reservoirs is realized by the radar map and the cloud model. The interpretation coincidence rate can be increased, and the interpretation conclusion is represented by a graph, so that the log multi-parameter oil-gas layer interpretation and evaluation method is intuitional in expression and strong in applicability.

Description

technical field [0001] The patent of the present invention relates to a mud logging multi-parameter oil and gas interpretation and evaluation method based on radar chart and cloud model theory. It can be used for oil and gas show interpretation and evaluation of tight sandstone, carbonate rock, and mud shale, and can be used to intuitively and quickly interpret reservoir fluid properties by using radar charts and cloud model diagrams. It belongs to the field of geology, well logging, and mud logging engineering services, especially mud logging oil and gas interpretation and evaluation. Background technique [0002] Mud logging is an important means of oil exploration and development. Mud logging multi-parameter is an important method of mud logging comprehensive interpretation, and the principle of radar chart and cloud model technology is applied to realize the graphic display and comprehensive quantitative evaluation of mud logging oil and gas display. The radar map meth...

AI Technical Summary

Problems solved by technology

[0003] The current multi-parameter interpretation of mud logging is mainly based on a simple comprehensive judgment using multiple conventional mud logging raw data, lacking a systematic theoretical interpretation basis, and the interpretation conclusion is easily limited by human subjective judgment ability, resulting in the coincidence rate of oil and gas show interpretation Low, poor applicability

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