Particle injection amount determination method and system for fracture-vuggy reservoir flow regulation technology

Abstract

The invention discloses a particle injection amount determination method for a fracture-vuggy reservoir flow regulation technology, which comprises: performing water injection operation on a to-be-researched reservoir area, and determining a water drive path, a flow regulation agent particle placement position, a shunt volume of each fracture channel at the bottom of a well and basic fracture information of each fracture channel; performing numerical simulation on the movement and accumulation process of the flow regulating agent particles in the oil reservoir area to be researched on the basis of the water drive path and the placement positions according to the shunt volume of each fracture channel and the basic fracture information, so as to obtain the total volume of a forming body formed by the flow regulating agent particles in each placement position; and according to the current total volume, determining the particle injection amount through the flow regulating agent injection speed. According to the invention, ineffectiveness caused by insufficient injection amount is overcome, and meanwhile, the phenomenon of complete blockage caused by too much injection amount is avoided, so that the oil increasing effect of an oil well is obvious.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a method and system for determining the injection amount of flow-regulating agent particles used in the flow-regulating technology of fracture-cavity reservoirs. Background technique [0002] For fracture-cavity bottom water reservoirs, the reservoir body is quite different from pore-type and fractured oil-gas reservoirs. Most of the reservoirs are dominated by the coexistence of pores, fractures and caves, and dissolved caves and fractures are fracture-cavity reservoirs. The main storage space, the fracture is the main channel to communicate with the cave. Among them, the large paleo-karst cave system is its main reservoir space, the reservoir scale varies greatly in space, and the distribution of reservoir space is discontinuous. At present, the water flooding effect of fractured-vuggy reservoir units is showing a trend of deterioration, and the proportion of ...

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Problems solved by technology

Therefore, the injection volume of flow regulating agent particles is the key factor determining the success of this technology. If the injection volume is too large, it is easy to cause both the dominant channel and the secondary channel to be blocked, which will seriously block the wellbore; if the injection volume is small , it will not divert the dominant channel, and will not have the effect of water control

[0004] Due to the method of determining the design parameters of the flow path adjustment technology used in the fractured-cavity reservoir area, it is impossible to learn from the profile control or drive displacement technology used in conventional clastic rock reservoirs to improve water flooding effects

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