CN209924970U

CN209924970U - Gas production simulator for water-cut gas reservoir

Info

Publication number: CN209924970U
Application number: CN201921657904.6U
Authority: CN
Inventors: 王升; 付玉; 张元杰
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-01-10
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a gas production simulator of water-cut gas reservoir, including high-pressure pump, high-pressure tank, rock core holder, backpressure valve, gas flowmeter and the tail gas treater that connects gradually, the rock core holder is parallelly connected and is provided with the several, the rock core holder includes rock core holder import, end cap, rock core, packing element, lateral wall, confining chamber and export, be equipped with the flexure strip on the packing element barrel, the packing element outside is equipped with the water filling port, is equipped with the import jumper wire between arbitrary two adjacent rock core holder imports, is equipped with the export jumper wire between the export, is connected with the steering jumper wire between import jumper wire and the export jumper wire, the utility model discloses a set up the rock core holder that has the flexure strip, can be used to simulate the gas production condition of water-cut gas reservoir; through setting up a plurality of jumper wires, can be used to the multiple combination condition of simulation fracture, be more suitable for the comparatively complicated actual stratum of fracture distribution condition.

Description

Gas production simulator for water-cut gas reservoir

Technical Field

The utility model relates to a gas reservoir gas production analog device technical field, concretely relates to gas production analogue means that gas reservoir was invaded to water.

Background

For example, Chinese patent CN 201464203U discloses a physical simulation experiment device for gas reservoir multilayer commingled production, which realizes gas production simulation of the gas reservoir in the multilayer commingled production process by arranging a plurality of core holders connected in parallel, and obtains pressure change in the multilayer gas production process by arranging a plurality of pressure sensors; chinese patent CN 209416878U discloses a parallel long core simulation device for low permeability gas reservoir multi-layer commingled production, which controls the core temperature through an electronic temperature control instrument, simulates multi-layer commingled production through long cores arranged in parallel, and ensures that gas can only flow in one direction through a one-way valve. However, at present, after long-term water injection displacement, the water content in the oil layer is high in large oil fields at home and abroad, so that the water invasion phenomenon is easy to happen when a part of new wells are exploited. None of the above devices can simulate gas production under water cut conditions at a gas reservoir.

SUMMERY OF THE UTILITY MODEL

In view of above technical problem, the utility model aims to provide a gas production analogue means that gas was hidden is invaded to water solves the problem that existing equipment can not simulate gas production under the condition is invaded to water.

The utility model adopts the following technical proposal:

the utility model provides a gas production analogue means of gas reservoir is invaded to water, includes high-pressure pump, high-pressure tank, rock core holder, backpressure valve, gas flowmeter and the tail gas treater that connects gradually, the rock core holder connects in parallel and is provided with the several, all is connected with backpressure valve and gas flowmeter, the rock core holder have following characteristic: the core holder comprises a core holder inlet, an end cap, a core, a rubber sleeve, a side wall, a confining pressure chamber and an outlet, the core holder is arranged according to a conventional core holder, an elastic sheet is arranged on a rubber sleeve barrel, the radian of the elastic sheet is 1-5 degrees, a water injection port is arranged on the outer side of the rubber sleeve, the water injection port is connected with a water injection pipeline, and the water injection pipeline is connected with a water injection joint through the confining pressure chamber and the end cap. If the radian of the elastic sheet is too large, when water injected into the rubber cylinder completely enters the rock core in the test process, the rubber cylinder is too large in deformation and is easily damaged under high pressure, confining pressure oil enters the test rock core, and the final result is influenced; if the radian of the elastic sheet is too small, the pores formed by the rubber cylinder and the core are too small, so that the water injection amount is insufficient.

Further, the tail gas treater comprises an alkali liquor tank and a micro torch which are sequentially connected, wherein the alkali liquor tank is used for removing acid gas in experimental gas, and the micro torch is used for removing residual combustible gas.

Further, a jumper is arranged between the core holders, specifically, an inlet jumper is arranged between inlets of any two adjacent core holders, an outlet jumper is arranged between outlets of any two adjacent core holders, two valves are arranged on the inlet jumper, two valves are arranged on the outlet jumper, a steering jumper is arranged between the inlet jumper and the outlet jumper, the steering jumper and the inlet jumper are arranged between the two valves, and a connecting point of the steering jumper and the outlet jumper is arranged between the two valves.

The utility model has the advantages that:

the utility model is provided with the rock core holder with the elastic sheet, which can be used for simulating the gas production condition of water-immersed gas reservoir; through setting up a plurality of jumper wires, can be used to the multiple combination condition of simulation fracture, be more suitable for the comparatively complicated actual stratum of fracture distribution condition.

Drawings

FIG. 1 is a general schematic view of the present invention;

FIG. 2 is a schematic structural view of the rock core holder of the present invention;

FIG. 3 is a schematic view of the structure of the rubber tube and the elastic sheet of the present invention;

in the figure, 1, a high-pressure pump, 2, a high-pressure tank, 3, a rock core holder, 4, a back pressure valve, 5, a gas flowmeter, 6, an alkali liquor tank, 7, a micro torch, 8, a confining pressure pump, 9, an outlet jumper, 10, an inlet jumper, 11, a steering jumper, 31, a support column, 32, an outlet, 33, an inlet, 34, a side wall, 35, a confining pressure oil inlet pipe, 36, a plug, 37, a confining pressure chamber, 38, an experimental rock core, 39, a rubber cylinder, 40, an elastic sheet, 41, a water injection port, 42, a water injection joint, 43 and a water injection pipeline.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Example (b):

the utility model provides a gas production analogue means that gas was hidden is invaded to water, includes high-pressure pump 1, high-pressure tank 2, rock core holder 3, backpressure valve 4, gas flowmeter 5, lye tank 6 and miniature torch 7 that connect gradually, and rock core holder 3 connects in parallel is provided with the several, all is connected with backpressure valve 4 and gas flowmeter 5, and rock core holder 3 has following characteristic: the core holder 3 comprises an inlet 33, a plug 36, a core 38, a rubber tube 39, a side wall 34, a confining pressure chamber 37, a confining pressure oil inlet pipe 35 and an outlet 32, the confining pressure oil inlet pipe 35 is connected with the confining pressure pump 8, the structure is arranged according to a conventional core holder, an arc-shaped elastic sheet 40 is arranged on the rubber tube 39, the radian of the elastic sheet is 3 degrees, a water injection port 41 is arranged on the outer side of the rubber tube 39, the water injection port 41 is connected with a water injection pipeline 43, and the water injection pipeline 43 is connected with a water injection joint 42 through the confining pressure chamber 37 and the plug 36. When the experiment core 38 is installed in the rubber barrel 39, the elastic piece 40 is arranged on the barrel body of the rubber barrel 39, so that a certain hole is formed between the rubber barrel 39 and the experiment core 38, water is injected into the hole through the water injection joint 42, the experiment core 38 is surrounded by water and used for simulating a stratum under a water invasion condition, and when the experiment core 38 is filled with experiment gas, a water invasion gas reservoir can be simulated.

The rock core holder is characterized in that a jumper is arranged between the rock core holders 3, an inlet jumper 10 is arranged between inlets of any two adjacent rock core holders 3, an outlet jumper 9 is arranged between outlets of the two adjacent rock core holders 3, two valves are arranged on the inlet jumper 10, two valves are arranged on the outlet jumper 9, a steering jumper 11 is arranged between the inlet jumper 10 and the outlet jumper 9, the steering jumper 11 and the inlet jumper 10 are arranged between the two valves, and a connecting point of the steering jumper 11 and the outlet jumper 9 is arranged between the two valves. The gas production condition when one main crack branch is a plurality of branch cracks can be simulated or the gas production condition when a plurality of branch cracks converge into one main crack can be simulated by opening and closing the corresponding valves.

As an alternative embodiment of this embodiment, at least one of the core holders may be a core holder as described above, and the remainder may be conventional core holders. The method is used for simulating the gas production condition when part of gas layers are invaded by water and the other gas layers are not invaded by water during multi-layer combined production.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. The utility model provides a gas production analogue means of gas reservoir is invaded to water, includes high-pressure pump, high-pressure tank, rock core holder, backpressure valve, gas flowmeter and the tail gas treater that connects gradually, the rock core holder connects in parallel and is provided with the several, all is connected with backpressure valve and gas flowmeter, its characterized in that, the rock core holder includes rock core holder import, end cap, rock core, packing element, lateral wall, confining pressure room and export, be equipped with the flexure strip on the packing element barrel, the packing element outside is equipped with the water filling port.

2. The gas production simulation device of a water-invaded gas reservoir of claim 1, wherein the tail gas processor comprises a lye tank and a micro-torch connected in sequence.

3. The gas production simulation device of a water-invaded gas reservoir of claim 1, wherein the water injection port is connected with a water injection pipeline, and the water injection pipeline is connected with a water injection joint after passing through the confining chamber and the plug.

4. A water invaded gas reservoir gas production simulator according to claim 1, characterized in that a jumper is provided between the core holders.

5. The gas production simulator for a water invaded gas reservoir according to claim 4, characterized in that an inlet jumper is provided between the inlets of any two adjacent core holders, an outlet jumper is provided between the outlets, two valves are provided on the inlet jumper, two valves are provided on the outlet jumper, a steering jumper is provided between the inlet jumper and the outlet jumper, the steering jumper and the inlet jumper are provided between the two valves, and the connecting point of the steering jumper and the outlet jumper is provided between the two valves.