An experimental device and method for controlling injection and production in simulated fault-block reservoirs

Abstract

The invention discloses an experimental device and method for controlling injection and production of simulated fault block reservoirs, wherein the device includes a sand filling model, an injection system, a back pressure system, and a pressurization system, and the pressurization system includes a special piston container, Boundary pressure pump, the special-purpose piston container includes a piston barrel, a piston, a start end cover, and an end cover, the piston is installed in the piston barrel, and the center of the start end cover is provided with a through main flow channel at the start end, and the main flow channel at the start end is connected to the boundary pressure pump , the center of the end cover is provided with a through terminal main flow channel, and the end main channel is connected to the slotted pipeline hole of the sand filling model, and the axial inner end surface of the end cover is provided with at least three fluid inlet and outlet holes, and the inside of the end cover is also provided with For oblique fluid passages, the number of fluid passages is the same as the number of fluid inlet and outlet holes, and they match each other one by one. The invention can better reflect the characteristics of the actual oil reservoir in the test, overcome the defect of the constant volume of the existing instrument, and can simulate different boundary and oil reservoir conditions.

Description

technical field [0001] The invention relates to the technical field of fault-block reservoir development, in particular to an experimental device and method for simulating fault-block reservoir regulation and control injection and production. Background technique [0002] The complex fault-block reservoirs in Shengli Oilfield are characterized by small area, small reserves, and strong heterogeneity, and are often developed by waterflooding with irregular well patterns with low injection and high production. Due to the influence of fault shielding, heterogeneity and uneven injection and production, during the water injection development process, the injected water bursts, the water cut rises rapidly, and the water control effect is poor, which leads to unbalanced interlayer and plane production. The oil distribution varies widely. Long-term water flooding development has entered the stage of ultra-high water cut as a whole. Generally, it has undergone multiple rounds of stra...

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Problems solved by technology

[0009] The purpose of the present invention is to provide an experimental device and method for controlling injection and production of simulated fault-block reservoirs. The device can better reflect the characteristics of the actual reservoir in the test, overcome the defect of constant volume of existing instruments, and can simulate different Boundary and reservoir conditions, and can withstand high temperature and high pressure, to meet the formation high temperature and high pressure conditions

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