A three-dimensional heterogeneous reservoir multi-well pattern water flooding physical simulation experiment device

Abstract

The invention discloses a three-dimensional heterogeneous reservoir multi-well pattern water flooding physical simulation experiment device, comprising a reservoir simulation system, an injection system and an experimental measurement system respectively connected with the reservoir simulation system, the reservoir The simulation system includes an experimental box, an insulating filter screen and a measuring electrode. The insulating filter screen is detachably arranged to divide the experimental box into multiple layers; the injection system includes an injection pump, an oil-water storage tank, a pressure gauge and multiple Through valve, the oil-water storage tank is connected to each layer of the experimental box through the multi-way valve and the injection pipeline; The flow metering system is connected to each layer of the experimental box through the discharge pipeline. The invention can ensure the filling and leveling degree of layers, more accurately simulate the development of interlayers, measure oil and water production in layers under the simulated multi-well pattern mode, and measure the resistance in real time to obtain the saturation distribution.

Description

technical field [0001] The invention relates to the technical field of reservoir development, in particular to a three-dimensional heterogeneous reservoir multi-well pattern water drive physical simulation experiment device. Background technique [0002] At present, most oil reservoirs in China are multi-layer oil reservoirs with strong vertical heterogeneity, interlayers between reservoirs are often not contiguous, and interlayer channeling is serious, which seriously affects the development effect of water flooding. The stronger the vertical heterogeneity, the more uneven the advance of the water flooding front and the lower the volumetric sweep coefficient. Physical simulation is an important means to study the water flooding development mechanism of this type of reservoir. Establishing a three-dimensional physical model that can fully consider the vertical heterogeneity and the development of interlayers will help to correctly understand the water flooding development la...

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Problems solved by technology

There are two obvious problems in this process: ①The top opening of the sand filling model is too large, and the sand body is difficult to flatten. During the experiment, the quartz sand is often washed out of the groove, resulting in poor reliability of the experimental conclusion; ②The saturation probe is squeezed into the quartz sand under the action of external force, which will aggravate the deformation of the quartz sand layer. In addition, the fixed electrode and wellbore will be deformed under the external force, and the connection with the top cover will be loose, resulting in the connection between the top cover electrode and the wellbore. Leakage;

[0004] 2. The well pattern patterns that can be studied are limited or single, and it is difficult to simulate the mining conditions of different well pattern patterns;

[0005] 3. The simple layer-by-layer filling method is often used to simulate different heterogeneous conditions in the vertical direction, and it is difficult to guarantee the degree of filling of a single layer and the boundary between layers;

[0006] 4. The setting of the interlayer is too simple, the mechanical strength is poor, and it is difficult to simulate the flow separation of the real interlayer;

[0007] 5. It is difficult to simulate the development of inclined strata

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