Three-dimensional heterogeneous oil-reservoir multi-well-pattern mode water flooding physical simulation experiment device

Abstract

The invention discloses a three-dimensional heterogeneous oil-reservoir multi-well-pattern mode water flooding physical simulation experiment device. The three-dimensional heterogeneous oil-reservoirmulti-well-pattern mode water flooding physical simulation experiment device comprises a reservoir simulation system, an injection system and an experimental measurement system, wherein the injectionsystem and the experimental measurement system are separately connected with the reservoir simulation system. The reservoir simulation system comprises an experiment box, an insulating filter screen and a measurement electrode. The insulating filter screen is detachably arranged to divide the experiment box into multiple layers; the injection system comprises an injection pump, an oil-and-water storage tank, a pressure gauge and a multiported valve, wherein the injection pump, the oil-and-water storage tank, the pressure gauge and the multiported valve are connected in sequence; the oil-waterstorage tank is connected with each layer of the experiment box through the multiported valve and an injection pipeline; and the experimental measurement system comprises a multi-channel resistance measurement instrument and a flow measurement system, wherein the multi-channel resistance measurement instrument is connected with the measuring electrode, and the flow measurement system is connectedwith each layer of the experiment box through discharging pipelines. According to the three-dimensional heterogeneous oil-reservoir multi-well-pattern mode water flooding physical simulation experiment device, multi-layer filling and leveling degree is ensured, the development of an interlayer can be more accurately simulated, the oil-and-water production can be measured in layers under the simulated multi-well-pattern mode, and the resistance is measured 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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