Method and system for determining the location of shallow well microseismic monitoring and observation stations on the ground

Abstract

Disclosed are a method and system for determining the position of a surface shallow well microseismic monitoring and observation station. The method may include: obtaining the work area data of the fracturing block, analyzing the influencing factors of setting up the monitoring and observation station; establishing a three-dimensional geological model according to the geological data of the fracturing block and surface exploration data; performing shallow surface wave detection on the three-dimensional geological model. Forward modeling to obtain the surface wave attenuation curve with depth to determine the burial depth; analyze the distribution of fracturing blocks and the depth of the target layer, simulate the distribution of hydraulic fracturing microseismic sources, and determine the maximum lateral layout range; determine the monitoring The layout method of the observation platform determines the number of monitoring and observation stations; the layout coordinates are determined according to the embedding depth of the monitoring and observation platform, the maximum horizontal layout range, the layout method and the number. The invention can reduce acquisition cost, reduce seismic record data volume, accelerate calculation efficiency, and has certain advantages in multi-well long-term monitoring and development zone stage.

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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