CN212748657U

CN212748657U - Rock core imbibition experiment measuring device under simulation high temperature high pressure condition

Info

Publication number: CN212748657U
Application number: CN202021482569.3U
Authority: CN
Inventors: 付健; 郭肖
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-19
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a rock core imbibition experiment measuring device under simulation high temperature high pressure condition, the device includes that pressure supplies with and monitoring mechanism, heating rabbling mechanism, measuring mechanism, rock core imbibition mechanism, the six-way valve, injection manifold and injection branch pipe, heating rabbling mechanism, rock core imbibition mechanism and injection branch pipe all have a plurality of rock core imbibition mechanisms to include high temperature and high pressure resistant container main part, support and magnetism stirring rotor, the container includes container main part and top cap, the top cap lid fits in the container main part, each support is located the container main part that corresponds, each container main part is connected with the heating rabbling mechanism that corresponds respectively, the one end and the pressure supply and the monitoring mechanism of injection manifold are connected, the injection manifold other end and the one end and the six-way valve of each injection branch pipe are connected, the other end of each injection straight tube communicates with the container respectively. The utility model discloses a device simple structure, convenient to use safety, accessible simulation stratum condition are studied high temperature high pressure imbibition effect.

Description

Rock core imbibition experiment measuring device under simulation high temperature high pressure condition

Technical Field

The utility model particularly designs a rock core imbibition experiment measuring device under simulation high temperature high pressure condition is applicable to the imbibition experiment under the simulation stratum high temperature high pressure condition, the utility model belongs to the technical field of oil gas reservoir development research.

Background

In the development process of a low-permeability oil and gas reservoir, due to the influence of reservoir heterogeneity, the oil and water displacement effects of different production zones have certain difference, and only by correctly recognizing reservoir oil-water migration and displacement rules, the oil and gas exploitation can be correctly guided, the final recovery rate is improved, and the economic benefit maximization is realized. However, the research of the current imbibition experiment is mostly limited to spontaneous imbibition experiments under constant temperature and normal pressure, has larger difference with real oil reservoir conditions, and has less research on the influence of each production parameter on imbibition under the condition of simulating the stratum. The method has the advantages that the seepage experiment is carried out by simulating the high-temperature and high-pressure conditions under the stratum, the CT scanning technology, the constant-speed mercury pressing experiment and the nuclear magnetic resonance are combined to research the influence of the microscopic pore throat structure on the seepage effect, and people can be scientifically helped to know the oil gas distribution characteristics and the mining rule.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rock core imbibition experiment measuring device under simulation high temperature high pressure condition, the device simple structure, it is safe in utilization to low in cost.

In order to achieve the purpose, the utility model adopts the technical proposal that:

the utility model discloses a pressure is supplied with and monitoring mechanism, the heating rabbling mechanism, measuring mechanism, the rock core imbibition mechanism, the six-way valve, injection manifold and injection branch pipe, the heating rabbling mechanism, rock core imbibition mechanism and injection branch pipe all have a plurality ofly and quantity the same, rock core imbibition mechanism is including high temperature and high pressure resistant container, support and magnetic stirring rotor, the container includes container main part and top cap, the top cap lid fits on the container main part, the support is located the container main part, magnetic stirring rotor is located the support below, each container main part is connected with the heating rabbling mechanism that corresponds respectively, the one end of injection manifold is connected with pressure supply and monitoring mechanism, the other end of each injection branch pipe communicates with the container respectively.

Preferably, said pressure supply and monitoring means is constituted by an ISCo pump and an intermediate container, to which a pressure value is set, which keeps the pressure constant.

Preferably, the container body is cylindrical, and the top cover is disc-shaped.

Preferably, a valve is arranged at the center of each top cover, and the other end of each injection branch pipe is respectively connected with the corresponding valve.

Preferably, the heating and stirring mechanism is a magnetic stirrer, the container is arranged on a working disc of the magnetic stirrer, and the magnetic stirring rotor is positioned in the container.

Preferably, the measuring mechanism is a nuclear magnetic resonance apparatus.

Compared with the prior art, the experiment has the following beneficial effects:

1. the utility model discloses a magnetic stirrers can provide the rotational speed and the temperature of setting for, and the rotational speed of setting for can simulate the fluidic speed in the reservoir, and the temperature condition in the reservoir can be simulated to the temperature of setting for.

2. The utility model discloses an ISCo pump both can provide pressure, can monitor the liquid velocity of flow again to can the steady pressure remain unchanged.

3. The utility model discloses a nuclear magnetic resonance spectrometer can record the T of rock specimen₂And (4) spectrum, thereby calculating the oil saturation and the water saturation in the rock sample.

Drawings

FIG. 1 is a schematic view of the present invention

FIG. 2 is a schematic structural view of a core imbibition mechanism

Reference numerals in the figures

ISCo pump (1), injection main pipe, (2), intermediate container (3), six-way valve (4), injection branch pipe (5), valve (6), container main body (7), magnetic stirrer (8), container top cover (9), rock core sample (10), support (11), magnetic stirring rotor (12).

Detailed Description

The following further describes the embodiments of the present invention with reference to the attached drawings:

the utility model provides a measuring device of rock core imbibition experiment under simulation high temperature high pressure condition, including pressure supply and monitoring mechanism, heating rabbling mechanism, measuring mechanism, rock core imbibition mechanism, six-way valve 4, injection manifold 2 and injection branch pipe 5, heating rabbling mechanism, rock core imbibition mechanism and injection branch pipe all have a plurality of and quantity the same. The utility model discloses pressure feed and monitoring mechanism comprises ISCo pump 1 and intermediate container 3, and heating rabbling mechanism is JK-DMS-ProNII type magnetic stirrers 8, and measuring mechanism is meso MR23-60H-I type nuclear magnetic resonance appearance, and rock core imbibition mechanism comprises high temperature and high pressure resistant container main part 7, top cap 9, support 11, magnetism stirring rotor 12. The core sample 10 is firstly saturated by saline water with the mineralization degree of 30000ppm, then is displaced by mixed solution added with manganese chloride, finally is displaced by kerosene to establish the irreducible water saturation, and is scanned by a nuclear magnetic resonance spectrometer to obtain saturated simulated formation water, saturated manganese chloride mixed solution and three T2 spectrums after establishing the irreducible water saturation.

As shown in fig. 1, the ISCo pump 1 is connected to the intermediate container 3 through the injection manifold 2, and distilled water is added to the ISCo pump 1 and imbibing liquid is added from the upper portion of the intermediate container 3. The other end of the injection main pipe 2 and one end of the injection branch pipe 5 are connected with the six-way valve 4, the valve 6 is connected with the other end of the injection branch pipe 5 and the container top cover 9, the container main body 7 is placed on a working disc of the magnetic stirrer 8, the magnetic stirring rotor 12 is placed below the support 11 in the container main body 7, the rock core sample 10 is placed on the support 11, imbibition liquid is injected into the container main body 7 until the rock core sample 10 is submerged, and finally the container top cover 9 is covered on the container main body 7.

Opening the valve on the six-way valve 4 and the valve 6 connected to the injection branch pipe 2, setting a preset temperature and a preset rotating speed on the magnetic stirrer 8, starting the magnetic stirrer 8 to reach the preset temperature, setting a pressure value on the ISCo pump 1, pressing a start button, and monitoring the pressure change in the container and the liquid flow rate change in real time through a screen. After the imbibition is finished, the magnetic stirrer 8 is closed to stop heating and provide the rotating speed, the ISCo pump 1 is closed to relieve the pressure, the six-way valve 4 and the valve 6 are closed, the container top cover 9 is detached, the core sample 10 is taken out, and the core sample 10 is scanned by a nuclear magnetic resonance spectrometer to obtain a residual oil T2 spectrum after imbibition. And (3) safely disposing the mixed liquid in the container main body 7, putting the core sample 10 on the bracket 11 in the container main body 7 again, repeating the steps until the residual oil saturation of the core sample 10 is not changed, and stopping the imbibition experiment.

To sum up, the utility model discloses a simple structure can accomplish the simulation rock core imbibition experiment under the high temperature high pressure condition fast. The defect that the stratum condition cannot be simulated in the conventional normal-temperature normal-pressure spontaneous imbibition technology is overcome, and the experimental device is simple, safe to operate and high in applicability.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims

1. The utility model provides a rock core imbibition experiment measuring device under simulation high temperature high pressure condition which characterized in that: the device comprises a pressure supply and monitoring mechanism, a heating and stirring mechanism, a measuring mechanism, a rock core imbibition mechanism, a six-way valve, an injection main pipe and injection branch pipes, wherein the heating and stirring mechanism, the rock core imbibition mechanism and the injection branch pipes are multiple and same in number;

the pressure supply and monitoring mechanism consists of an ISCO pump and an intermediate container, a pressure value is set for the ISCO pump, the flow rate of liquid inlet can be monitored, the flow rate of liquid return can be monitored along with the rise of the ambient temperature, and the pressure is kept unchanged.

2. The device for simulating measurement of core imbibition experiments under high-temperature and high-pressure conditions as claimed in claim 1, wherein: the container main body is cylindrical, and the top cover is disc-shaped.

3. The device for simulating measurement of core imbibition experiments under high-temperature and high-pressure conditions as claimed in claim 1, wherein: the center of each top cover is provided with a valve, and the other end of each injection branch pipe is respectively connected with the corresponding valve.

4. The device for simulating measurement of core imbibition experiments under high-temperature and high-pressure conditions as claimed in claim 1, wherein: the heating and stirring mechanism is a magnetic stirrer, the container is arranged on a working disc of the magnetic stirrer, and the magnetic stirring rotor is positioned in the container.

5. The device for simulating measurement of core imbibition experiments under high-temperature and high-pressure conditions as claimed in claim 1, wherein: the measuring mechanism is a nuclear magnetic resonance spectrometer.