Adjustment and control injection-production experimental device and method for simulating fault block reservoirs

Abstract

The invention discloses an adjustment and control injection-production experimental device and method for simulating fault block reservoirs. The adjustment and control injection-production experimental device comprises a sand-packed model, an injection system and a back-pressure system, and further comprises a pressurization system; the pressurization system comprises a special piston-type container and a boundary pressure pump; the special piston-type container comprises a piston cylinder, a piston, an initial end cover and a tail end cover; the piston is mounted in the piston cylinder, and athrough initial end main flow pass is formed in the center of the initial end cover and connected with the boundary pressure pump; a through tail end main flow pass is formed in the center of the tail end cover and connected with a slotted pipeline hole of the sand-packed model, and three or more fluid in-out holes are formed in the axial inner end face of the tail end cover; and oblique fluid channels are further formed in the tail end cover, and the fluid channels and the fluid in-out holes are the same in number and mutually correspond one to one in a matched mode. The actual reservoir characteristics can be reflected better in a test, the defect of constant volume of an existing instrument is overcome, and different boundary and reservoir conditions can be simulated.

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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