CN206220951U - A kind of experimental provision of simulation oil well foam blocking side water breakthrough - Google Patents

Abstract

The utility model relates to an experimental equipment in the field of oil production engineering, in particular to an experimental device for simulating water channeling at the side of oil well foam plugging, which is used for simulating oil well water plugging through foam under conditions of oil reservoirs (high temperature and high pressure), especially It is an experimental simulation of edge water channeling plugging for oil wells in strong edge water reservoirs. It includes high-pressure gas source, reservoir buffer, constant temperature box, sand filling model, intermediate container, constant pressure pump, back pressure controller, gas volume meter and oil-water collector, and the constant temperature box is composed of constant temperature equipment and sand filling model , where the sand filling model is located inside the constant temperature box, the outlet manifold branches are respectively connected to the outlet of the back pressure controller and the inlet of the oil-water collector, the inlet of the intermediate container is connected to the constant pressure pump, and the outlet is respectively connected to the right balance of the reservoir buffer through branches Tank top and sand fill model. The utility model has the characteristics of safety and applicability, and can more realistically simulate the actual situation of water channeling at the edge of foam plugging under oil reservoir conditions.

Description

An experimental device for simulating water channeling at the side of oil well foam plugging

technical field

The utility model relates to an experimental equipment in the field of oil production engineering, in particular to an experimental device for simulating water channeling at the side of oil well foam plugging, which is used for simulating oil well water plugging through foam under conditions of oil reservoirs (high temperature and high pressure), especially It is an experimental simulation of edge water channeling plugging for oil wells in strong edge water reservoirs.

Background technique

In the later stages of offshore water drive oilfields, relatively serious water channeling (including injection water channeling and bottom water channeling) usually occurs, resulting in a sharp increase in the water production rate of oil wells, which has become the main factor restricting the "water control and oil stabilization" of offshore water drive oilfields in the later stage . In response to this problem, at present, profile control of water injection wells is mainly carried out in China, while relatively little work is carried out on water plugging of oil wells. With the increasing difficulty of oilfield high water cut treatment, more and more oil well water plugging work will be carried out. Oil well water plugging technology can effectively block high-permeability channels, control the water channeling of injected water and edge and bottom water, and achieve the purpose of slowing down the rise of water cut.

Utility model content

The utility model aims to solve the problems mentioned in the background technology. The utility model proposes an experimental device for simulating water channeling at the side of oil well foam plugging. The technical scheme adopted is as follows:

An experimental device for simulating water channeling at the side of oil well foam plugging, including high-pressure gas source, reservoir buffer, constant temperature box, sand filling model, intermediate container, constant pressure pump, back pressure controller, gas volume meter and oil-water collection device, wherein the constant temperature box is composed of constant temperature equipment and a sand filling model, and the constant temperature box is set to the temperature of the reservoir, and a double-tube sand filling model with saturated oil-bound water state with different permeability is used to simulate the heterogeneous formation, wherein the sand filling model Located inside the incubator, it is made of a sand-filled pipe with a diameter of 25mm and a length of 600mm. The interior is filled with 60-80 mesh quartz sand. The inlet and outlet manifolds are equipped with pressure gauges, and the outlet manifold branches are respectively connected to the outlet of the back pressure controller. And the inlet of the oil-water collector, the back pressure controller is used to simulate the reservoir pressure, the inlet of the intermediate container is connected to the constant pressure pump, and the outlet is respectively connected to the upper part of the right balance tank of the reservoir buffer and the sand filling model through branches, and the constant pressure The pump is used to simulate edge water, and the gas volume meter is installed on the outlet manifold of the oil-water collector.

The reservoir buffer is composed of a high-pressure gas source, two balance tanks, and a pressure gauge. The upper end of the left balance tube is connected to the outlet of the high-pressure gas source, the bottom of the two balance tanks is connected through a manifold, and the upper end of the right balance tank is respectively installed with a pressure gauge. The outlet branch end of the table and intermediate container; the reservoir buffer is used to increase the elasticity of the sand packing model and relieve the sharp increase of pressure in the sand packing model during the plugging agent injection process and the self-gasification process. The gas pressure of the reservoir buffer is higher than that of the outlet The back pressure of the end back pressure controller, so the reservoir fluid entering the reservoir buffer can preferentially flow back into the sand-packing model when the well is finished and resumes production, so that it can simulate back pressure and increase the capacity elasticity of the sand-packing model at the same time role.

The utility model has the following advantages: it is safe and applicable, and can more realistically simulate the actual situation of water channeling at the edge of foam plugging under oil reservoir conditions, which is beneficial for screening suitable oil well water plugging systems for different reservoir conditions, and is widely popularized in oil fields After application, good economic and social benefits will be produced.

Description of drawings

Figure 1: This utility model is an experimental device for simulating water channeling at the side of oil well foam plugging.

1. High pressure gas source, 2. Reservoir buffer, 3. Constant temperature box, 4. Sand filling model, 5. Intermediate container, 6. Constant pressure pump, 7. Back pressure controller, 8. Gas volume meter, 9 .Oil water collector.

detailed description

Below in conjunction with accompanying drawing and example the utility model is described further:

As shown in Figure 1, the utility model is an experimental device for simulating water channeling at the side of oil well foam plugging, including high-pressure gas source 1, oil reservoir buffer 2, constant temperature box 3, sand filling model 4, intermediate container 5, constant pressure Pump 6, back pressure controller 7, gas volume meter 8 and oil-water collector 9, wherein the reservoir buffer 2 is composed of high-pressure gas source 1, two balance tanks and pressure gauges, wherein the upper end of the left balance pipe is connected to The outlet of the high-pressure gas source 1, the bottom of the two balance tanks are connected through a manifold, the upper end of the right balance tank is respectively equipped with a pressure gauge and the outlet branch end of the intermediate container 5, and the thermostat 3 is composed of a constant temperature device and a sand filling model 4, wherein The sand filling model 4 is located inside the constant temperature box 3 and is made of a sand filling pipe with a diameter of 25 mm and a length of 600 mm. The interior is filled with 60-80 mesh quartz sand. The inlet and outlet manifolds are equipped with pressure gauges, and the branches of the outlet manifolds are respectively connected to the The outlet of the pressure controller 7 and the inlet of the oil-water collector 9, the inlet of the intermediate container 5 is connected to the constant pressure pump 6, and the outlet is respectively connected to the upper part of the right balance tank of the reservoir buffer 2 and the sand filling model 4 through branches, so The gas volume meter 8 is installed on the outlet manifold of the oil-water collector 9.

In the present utility model, the constant temperature box 3 is set to the reservoir temperature, and the double-pipe sand filling model 4 in the state of saturated oil bound water with different permeability is used to simulate the heterogeneous formation, and the constant pressure pump 6 is used to simulate the edge water, and the back pressure The controller 7 is used to simulate the reservoir pressure, and the reservoir buffer 2 is used to increase the elasticity of the sand-packing model 4 to alleviate the sharp increase of pressure in the sand-packing model 4 during the plugging agent injection process and the self-gas generation process, and the reservoir buffer 2 The gas pressure of the gas is higher than the back pressure of the back pressure controller 7 at the outlet end, so the reservoir fluid entering the reservoir buffer 2 can preferentially flow back into the sand packing model 4 when the brine well ends and resumes production, so that it can simultaneously simulate The effect of back pressure and increasing the capacity elasticity of the sand filling model 4; when using the utility model, first close the oil reservoir buffer 2, open the constant pressure pump 6 and simulate the early edge water drive under the back pressure of the back pressure controller 7, and record The oil production rate and water production rate in the oil-water collector 9 at the outlet end, when the water content of the combined output liquid of the sand filling model 4 exceeds 80%, the constant pressure pump 6 is turned off, the reservoir buffer 2 is turned on, and the back pressure controller 7 is turned off. Inject foam agent from the outlet end to simulate the foam water shutoff process of the oil well, then place the sand filling model 4 in the constant temperature box 3 to simulate the soaking well for 6-8 hours, then open the back pressure controller 7, close the oil reservoir buffer 2, and open the thermostat Press the pump 6 to simulate the follow-up side water flooding, record the oil production and water production in the oil-water collector 9 at the outlet end, stop the water flooding when the water content of the sand filling model 4 exceeds 98%, and draw the diversion rate change Curve and EOR range to evaluate the effect of water channeling at the edge of foam plugging in oil wells.

Claims (2)

1. An experimental device for simulating water channeling at the side of oil well foam plugging, characterized in that it includes a high-pressure gas source (1), a reservoir buffer (2), a constant temperature box (3), and a sand filling model (4) , intermediate container (5), constant pressure pump (6), back pressure controller (7), gas volume meter (8) and oil-water collector (9), wherein the thermostat box (3) has constant temperature equipment and sand filling model (4) Composition, wherein the sand filling model (4) is located inside the constant temperature box (3), and is made of a sand filling pipe with a diameter of 25mm and a length of 600mm, and the interior is filled with 60-80 mesh quartz sand, and the inlet and outlet manifolds are arranged. The pressure gauge and outlet manifold branches are respectively connected to the outlet of the back pressure controller (7) and the inlet of the oil-water collector (9), the inlet of the intermediate container (5) is connected to the constant pressure pump (6), and the outlet is respectively connected to the reservoir buffer through the branch The upper part of the balance tank on the right side of the device (2) and the sand filling model (4), the gas volume meter (8) is installed on the outlet manifold of the oil-water collector (9). 2. A kind of experimental device for simulating oil well foam plugging edge water channeling according to claim 1, characterized in that: the reservoir buffer (2) consists of a high-pressure gas source (1) and two balance tanks, pressure The upper end of the balance pipe on the left is connected to the outlet of the high-pressure gas source (1), the bottom of the two balance tanks is connected through a manifold, and the upper end of the balance tank on the right is respectively equipped with a pressure gauge and an outlet branch end of the intermediate container (5).