Method and system for determining position of ground shallow shaft micro-seismic monitoring observation station

Abstract

The invention discloses a method and system for determining the position of a ground shallow shaft micro-seismic monitoring observation station. The method comprises the steps that the work area dataof a fracturing block are acquired, and the influencing factors of monitoring observation station setting are analyzed; a three-dimensional geological model is established according to the geologicaldata of the fracturing block and surface exploration data; shallow surface wave forward modeling is carried out the three-dimensional geological model to acquire a surface wave attenuation curve withdepth and determine the embedding depth; the fracturing block distribution and the depth of a target layer are analyzed, and hydraulic fracturing micro-seismic origin distribution simulating is carried out to determine the maximum horizontal layout range; according to the influencing factors, the layout mode of the monitoring observation station is determined, and the number of the monitoring observation station is determined; and the layout coordinate is determined according to the embedding depth, the maximum horizontal layout range, the layout mode and the number of the monitoring observation station. According to the invention, the collection cost can be reduced; the amount of seismic record data is reduced; the calculation efficiency is accelerated; and the method and system have certain advantages in the stage of multi-well long-term monitoring and development zone.

Description

technical field [0001] The invention relates to the field of petroleum geophysical exploration, and more specifically, to a method and system for determining the position of a surface shallow well microseismic monitoring and observation station. Background technique [0002] Microseismic fracturing monitoring technology has now become a commonly used monitoring technology in the development of oil and gas fields in tight reservoirs. At this stage, it is mainly based on well monitoring and surface monitoring. [0003] In-hole monitoring method: the geophone is located in the downhole, close to the fracturing fracture, the micro-seismic signal attenuation is small, the received micro-seismic signal is strong, the environmental noise interference is small, and the signal-to-noise ratio is high, but there are some limitations, such as downhole observation It is required that the geophone can adapt to the harsh environment underground, has high requirements for equipment, high co...

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Problems solved by technology

[0003] In-hole monitoring method: the geophone is located in the downhole, close to the fracturing fracture, the micro-seismic signal attenuation is small, the received micro-seismic signal is strong, the environmental noise interference is small, and the signal-to-noise ratio is high, but there are some limitations, such as downhole observation It is required that the geophone can adapt to the harsh environment underground, has high requirements for equipment, high cost, limited monitoring range, and is not suitable for permanent monitoring, etc.

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