CN106437637B - High temperature and pressure carbon dioxide flooding super-viscous oil visualizes microcosmos experiment method - Google Patents

High temperature and pressure carbon dioxide flooding super-viscous oil visualizes microcosmos experiment method Download PDF

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CN106437637B
CN106437637B CN201610831430.7A CN201610831430A CN106437637B CN 106437637 B CN106437637 B CN 106437637B CN 201610831430 A CN201610831430 A CN 201610831430A CN 106437637 B CN106437637 B CN 106437637B
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gas
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朱维耀
宋智勇
韩宏彦
岳明
宋洪庆
杨连枝
范盼伟
李兵兵
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University of Science and Technology Beijing USTB
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Abstract

本发明提供一种高温高压二氧化碳驱超稠油可视化微观实验装置及方法,属于石油开采技术领域。该装置包括夹持有微观可视模型的模型夹持器、驱替系统、回压系统、围压系统、压力监视系统、温度控制系统以及图像采集系统;该装置控制温度和压力简便,使用空间小,安全性能优越,操作简便,可以准确的模拟油藏实际条件,在可视化条件下可以清晰实时的观察二氧化碳驱替过程中的油气作用变化,对于研究沥青质的析出规律及其对采收率的影响以及二氧化碳驱替实验在石油行业中的广泛应用和推广都具有非常重要的意义。

The invention provides a high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization microscopic experiment device and method, which belong to the technical field of petroleum exploitation. The device includes a model holder holding a microscopic visual model, a displacement system, a back pressure system, a confining pressure system, a pressure monitoring system, a temperature control system and an image acquisition system; Small size, superior safety performance, easy operation, can accurately simulate the actual conditions of the reservoir, and can clearly and real-time observe the change of oil and gas in the process of carbon dioxide displacement under visualization conditions, which is very useful for studying the precipitation law of asphaltenes and its impact on recovery The influence of carbon dioxide displacement experiments and the wide application and promotion in the petroleum industry are of great significance.

Description

高温高压二氧化碳驱超稠油可视化微观实验方法Visible microscopic experimental method for high temperature and high pressure carbon dioxide flooding of super heavy oil

技术领域technical field

本发明涉及石油开采技术领域,特别是指一种高温高压二氧化碳驱超稠油可视化微观实验方法。The invention relates to the technical field of petroleum exploitation, in particular to a high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization microscopic experimental method.

背景技术Background technique

油藏环境孔隙介质中二氧化碳与石油烃作用技术研究,是一项利用二氧化碳改变石油烃的组成和流动性,进而提高原油采收率的一项综合性技术。经过近年来的不断研究和现场试验,二氧化碳在油田中的应用有了长足的发展,用二氧化碳在高含蜡油井和有机质沉淀堵塞油井中进行吞吐,已成为一种常规的增产技术;二氧化碳驱油提高采收率也有了较强的技术积累,二氧化碳驱油将在高含水油田、聚合物驱后的油田提高采收率中起到非常重要的作用。The technical research on the interaction between carbon dioxide and petroleum hydrocarbons in the porous medium of oil reservoir environment is a comprehensive technology that uses carbon dioxide to change the composition and fluidity of petroleum hydrocarbons, thereby enhancing oil recovery. After continuous research and field tests in recent years, the application of carbon dioxide in oilfields has made great progress. Using carbon dioxide to huff and puff oil wells with high wax content and oil wells blocked by organic matter precipitation has become a conventional production stimulation technology; carbon dioxide flooding Enhanced oil recovery also has a strong technical accumulation, and carbon dioxide flooding will play a very important role in the enhanced oil recovery of high water-cut oilfields and oilfields after polymer flooding.

二氧化碳采油技术与其他三次采油技术相比,具有适用范围广、工艺简单、投资少、见效快、功能多、费用低、无污染等优点,是目前最具发展前景的一项三次采油技术。但是,由于气体的注入极易造成原油中沥青质、胶质和石蜡等重有机物的沉淀,造成储藏渗透率下降、润湿性反转,严重影响原油的运移和开采。目前已有的理论研究成果不能满足油田生产对理论的需求,尤其缺少高温、高压条件下可视化的二氧化碳微观驱油过程及二氧化碳对沥青质沉淀析出过程的机理分析。因此,亟需研究能够调整温度和压力的二氧化碳驱超稠油可视化微观实验方法及装置。Compared with other tertiary oil recovery technologies, carbon dioxide oil recovery technology has the advantages of wide application range, simple process, less investment, quick results, multiple functions, low cost, and no pollution. It is currently the most promising tertiary oil recovery technology. However, the gas injection can easily lead to the precipitation of heavy organic matter such as asphaltene, colloid, and paraffin in crude oil, resulting in a decrease in storage permeability and reverse wettability, seriously affecting the migration and production of crude oil. The existing theoretical research results cannot meet the theoretical needs of oilfield production, especially the lack of visual carbon dioxide microscopic oil displacement process under high temperature and high pressure conditions and the mechanism analysis of carbon dioxide on asphaltene precipitation process. Therefore, it is urgent to study the visual microscopic experimental method and device for carbon dioxide flooding super heavy oil that can adjust the temperature and pressure.

发明内容Contents of the invention

本发明要解决的技术问题是提供一种高温高压二氧化碳驱超稠油可视化微观实验方法,该可视化模拟驱油实验研究装置用于解决目前尚不能模拟高温高压条件下进行微生物驱油的研究问题。本发明涉及石油天然气流动实验装置,可以利用普通玻璃微观实验模型进行压力在30MPa以下的,压差在8MPa以下、温度在150℃以下的各种微观实验,实验模型大小为40mm×40mm,孔隙体积约为50×10-9m3,可以完成高温高压条件下二氧化碳驱稠油过程中沥青质的析出情况。The technical problem to be solved by the present invention is to provide a high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization micro-experimental method, and the visual simulation oil-flooding experiment research device is used to solve research problems that cannot simulate microbial flooding under high-temperature and high-pressure conditions at present. The invention relates to an experimental device for oil and natural gas flow. The common glass microscopic experimental model can be used to carry out various microscopic experiments with a pressure below 30MPa, a pressure difference below 8MPa, and a temperature below 150°C. The size of the experimental model is 40mm×40mm, and the pore volume It is about 50×10 -9 m 3 , which can complete the precipitation of asphaltenes during carbon dioxide flooding of heavy oil under high temperature and high pressure conditions.

该方法所用装置包括夹持有微观可视模型的模型夹持器、驱替系统、回压系统、围压系统、压力监测 系统、温度控制系统、气液分离系统以及图像采集系统;其中,The device used in the method includes a model holder holding a microscopic visual model, a displacement system, a back pressure system, a confining pressure system, a pressure monitoring system, a temperature control system, a gas-liquid separation system, and an image acquisition system; wherein,

模型夹持器包括缸体,缸体上具有流体流入孔、流体流出孔、围压孔以及测温孔;微观可视模型位于缸体中部,微观可视模型设有进口和出口,流体流入孔与进口相通,流体流出孔与出口相通,测温孔设置在流体流入孔下方,围压孔设置在流体流出孔下方;The model holder includes a cylinder body, which has fluid inflow holes, fluid outflow holes, confining pressure holes and temperature measurement holes; the microscopic visual model is located in the middle of the cylinder body, and the microscopic visual model is provided with inlets and outlets, and fluid inflow holes It communicates with the inlet, the fluid outflow hole communicates with the outlet, the temperature measuring hole is set under the fluid inflow hole, and the confining pressure hole is set under the fluid outflow hole;

驱替系统包括二氧化碳气瓶、第一气体流量计,双缸恒速恒压泵、二氧化碳泵入机构、水泵入机构以及油泵入机构,二氧化碳气瓶通过第一气体流量计与二氧化碳泵入机构连接,用于将二氧化碳输送到二氧化碳泵入机构的活塞上部,二氧化碳泵入机构、水泵入机构以及油泵入机构分别与模型夹持器的流体流入孔连接,并通过双缸恒速恒压泵将二氧化碳泵入机构中的二氧化碳、水泵入机构中的水以及油泵入机构中的油通过流体流入孔泵入到微观可视模型中,二氧化碳泵入机构、水泵入机构和油泵入机构下部管道通入去离子水中,去离子水泵入双缸恒速恒压泵中的泵筒体下部并推动活塞上移,为实验提供压力;第一气体流量计用于测量气体的注入量;The displacement system includes a carbon dioxide gas cylinder, a first gas flowmeter, a double-cylinder constant speed and constant pressure pump, a carbon dioxide pumping mechanism, a water pumping mechanism and an oil pumping mechanism. The carbon dioxide gas cylinder is connected to the carbon dioxide pumping mechanism through the first gas flowmeter , used to transport carbon dioxide to the upper part of the piston of the carbon dioxide pumping mechanism, the carbon dioxide pumping mechanism, the water pumping mechanism and the oil pumping mechanism are respectively connected with the fluid inflow hole of the model holder, and the carbon dioxide is pumped through the double-cylinder constant speed and constant pressure pump The carbon dioxide in the pumping mechanism, the water in the water pumping mechanism and the oil in the oil pumping mechanism are pumped into the microscopic visual model through the fluid inflow hole, and the lower pipes of the carbon dioxide pumping mechanism, the water pumping mechanism and the oil pumping mechanism go in and out. In ionized water, deionized water is pumped into the lower part of the pump cylinder in the double-cylinder constant-speed constant-pressure pump and pushes the piston up to provide pressure for the experiment; the first gas flowmeter is used to measure the injection volume of gas;

双缸恒速恒压泵是一种高压柱塞泵,具有恒速、恒压两种工作模式以及相应模式下的多种不同工作方式:本发明中采用恒速(恒流)工作模式,能连续不断的提供恒定流速无脉冲的液体,同时自动检测两泵筒体内的压力、流量信号,并具有压力保护功能;The double-cylinder constant speed and constant pressure pump is a high-pressure plunger pump, which has two working modes of constant speed and constant pressure and various different working modes under the corresponding modes: the constant speed (constant current) working mode is adopted in the present invention, which can Continuously provide liquid with constant flow rate and no pulse, and automatically detect the pressure and flow signals in the two pump cylinders at the same time, and have pressure protection function;

回压系统与模型夹持器的流体流出孔连通,以使所述微观可视模型的出口增压到预定的压力;回压系统包括手动泵和回压缓冲罐,手动泵和回压缓冲罐之间设置阀门;The back pressure system communicates with the fluid outflow hole of the model holder, so that the outlet of the microscopic visual model is pressurized to a predetermined pressure; the back pressure system includes a manual pump and a back pressure buffer tank, a manual pump and a back pressure buffer tank Valves are set between;

围压系统由围压跟踪泵构成,围压跟踪泵为电子数字显示泵,可实时跟踪压力的变化,围压跟踪泵与模型夹持器的围压孔连通,使所述微观可视模型始终处于预定压力的环境中;The confining pressure system consists of a confining pressure tracking pump. The confining pressure tracking pump is an electronic digital display pump that can track pressure changes in real time. The confining pressure tracking pump is connected with the confining pressure hole of the model holder, so that the microscopic visual model be in a predetermined stressful environment;

压力监测系统用于监测围压压力、回压压力以及微观可视模型进口和出口的压力;The pressure monitoring system is used to monitor the confining pressure, the back pressure and the pressure at the inlet and outlet of the microscopic visual model;

温度控制系统通过测温探头与测温孔连通,为模型夹持器内部的微观可视模型提供一个定温环境;The temperature control system communicates with the temperature measuring hole through the temperature measuring probe to provide a constant temperature environment for the microscopic visual model inside the model holder;

气液分离系统包括气液分离器、储液烧杯、分析天平、干燥剂以及第二气体流量计,油气混合物进入到气液分离器后,气体上升通过干燥剂,经第二气体流量计测量得到微观可视模型里面流出的气体量,油靠重力沿管壁下滑到气液分离器的下部,流至储液烧杯,通过分析天平测量微观可视模型里面流出的油量;通过第一气体流量计和第二气体流量计准确测量出二氧化碳气体的消耗量;The gas-liquid separation system includes a gas-liquid separator, a liquid storage beaker, an analytical balance, a desiccant, and a second gas flowmeter. After the oil-gas mixture enters the gas-liquid separator, the gas rises through the desiccant and is measured by the second gas flowmeter. The amount of gas flowing out of the microscopic visual model, the oil slides along the pipe wall to the lower part of the gas-liquid separator by gravity, flows to the liquid storage beaker, and measures the amount of oil flowing out of the microscopic visual model through an analytical balance; through the first gas flow meter and the second gas flow meter to accurately measure the consumption of carbon dioxide gas;

图像采集系统用于实时显示和记录微观可视模型内的流动状态及沥青质析出情况;The image acquisition system is used to display and record the flow state and asphaltene precipitation in the microscopic visual model in real time;

所述可视化微观实验装置还包括回压阀,流体流出孔引出的管路其中一支通过回压阀分别连接回压系统的回压缓冲罐和气液分离系统的气液分离器,另一支管路接入真空容器,真空容器与真空泵相连。真空容器、真空泵,抽真空可以减少缸体内气体的残留,保证液体充满整个夹持器。The visualized microscopic experimental device also includes a back pressure valve, one of which is connected to the back pressure buffer tank of the back pressure system and the gas-liquid separator of the gas-liquid separation system through the back pressure valve, and the other branch of the pipeline is A vacuum container is connected, and the vacuum container is connected with a vacuum pump. Vacuum container, vacuum pump, and vacuuming can reduce the residual gas in the cylinder and ensure that the liquid fills the entire holder.

二氧化碳气瓶和第一气体流量计之间设置调压阀,第一气体流量计后设置单向阀,二氧化碳泵入机构、水泵入机构和油泵入机构之前均设有压力表。A pressure regulating valve is set between the carbon dioxide gas cylinder and the first gas flowmeter, a check valve is set behind the first gas flowmeter, and a pressure gauge is arranged before the carbon dioxide pumping mechanism, the water pumping mechanism and the oil pumping mechanism.

图像采集系统包括光源、录像仪、图像显示器和支架;模型夹持器固定在支架上,支架底座上设置有光源;模型夹持器上端连接录像仪,录像仪与图像显示器相连。The image acquisition system includes a light source, a video recorder, an image display and a support; the model holder is fixed on the support, and a light source is arranged on the base of the support; the upper end of the model holder is connected to the video recorder, and the video recorder is connected to the image display.

模型夹持器还包括上密封盖、下密封盖、上石英玻璃和下石英玻璃,微观可视模型放置在上密封盖和下密封盖之间,上密封盖和下密封盖内分别镶嵌上石英玻璃和下石英玻璃,通过上、下观察窗口及上下石英玻璃观察所述微观可视模型中的流体流动状态。The model holder also includes an upper sealing cover, a lower sealing cover, upper quartz glass and a lower quartz glass. The microscopic visual model is placed between the upper sealing cover and the lower sealing cover, and the upper sealing cover and the lower sealing cover are respectively embedded with upper quartz. glass and lower quartz glass, through the upper and lower observation windows and the upper and lower quartz glass to observe the fluid flow state in the microscopic visual model.

微观可视模型为透明的二维平面模型,通过把天然岩心的孔隙系统光刻蚀到平面玻璃上并烧结成型而制成,其孔隙体积为50ul,孔隙度为37%。The microscopic visual model is a transparent two-dimensional plane model, which is made by photoetching the pore system of the natural core onto the flat glass and sintering it into shape. The pore volume is 50ul and the porosity is 37%.

预定压力为15MPa。The predetermined pressure is 15MPa.

超稠油粘度在20000~40000mPa.s。The viscosity of super heavy oil is 20000~40000mPa.s.

采用该装置进行模拟实验的方法,包括如下步骤:The method for using the device to carry out simulation experiments may further comprise the steps:

(一)打开所述模型夹持器的上密封盖,将模型夹持器下缸体内加满去离子水,保证微观可视模型的进口和出口处没有气体的情况下,将微观可视模型放置在所述缸体内壁中部环状台阶上,放置过程中避免下缸体与微观可视模型之间出现气泡,且微观可视模型的进口、出口与流体流入孔、流体流出孔相对并且相通;微观可视模型放置好后,再将上缸体内添加去离子水,优选为约 2cm高度,放空状态下缓慢拧紧夹持器上密封盖,保证气泡完全排除后,关闭模型夹持器放空阀;模型夹持器中有气泡时,利用真空泵以及真空容器抽真空排除气泡并且关闭模型夹持器放空阀;此时,驱替系统中的双缸恒速恒压泵、二氧化碳泵入机构、水泵入机构以及油泵入机构、微观可视模型与回压阀、气液分离系统组合成一个密闭流动空间;(1) Open the upper sealing cover of the model holder, fill the lower cylinder of the model holder with deionized water, and ensure that there is no gas at the inlet and outlet of the microscopic visual model, the microscopic visual The model is placed on the ring-shaped step in the middle of the inner wall of the cylinder. During the placement process, air bubbles between the lower cylinder and the microscopic visual model are avoided, and the inlet and outlet of the microscopic visual model are opposite to the fluid inflow hole and the fluid outflow hole. Connected; after the microscopic visual model is placed, add deionized water to the upper cylinder, preferably at a height of about 2cm, and slowly tighten the upper sealing cover of the holder in the empty state to ensure that the air bubbles are completely eliminated, then close the model holder Vent valve; when there are air bubbles in the model holder, use the vacuum pump and vacuum container to evacuate the air bubbles and close the model holder vent valve; at this time, replace the double-cylinder constant-speed constant-pressure pump and the carbon dioxide pumping mechanism in the system , Water pumping mechanism, oil pumping mechanism, microscopic visual model, back pressure valve, and gas-liquid separation system are combined to form a closed flow space;

(二)打开温度控制系统,对微观可视模型进行定温加热,优选为90℃,随着温度的上升,通过围压跟踪泵将地层水通过围压孔注入模型夹持器的中空腔体中,因此围压压力值也逐渐升高;同时,打开水泵入机构的调节阀,当双缸恒速恒压泵压力显示为预定压力时,打开水泵入机构的调节阀,通过所述双缸恒速恒压泵把水泵入机构中的地层水注入微观可视模型内,注入速度根据围压改变,围压快速升高,注入速度调快;围压缓慢升高,注入速度调慢,随着围压的升高,调整回压阀,通过手动泵增加回压,保证水泵入机构注入微观可视模型的压力与回压的压力相等,即保证微观可视模型的进口、出口的压力值相等;直到温度达到定温,优选为90℃,围压稳定,围压达到预定压力,这时微观可视模型进口、出口的压力也为预定压力;(2) Turn on the temperature control system and heat the microscopic visual model at a constant temperature, preferably 90°C. As the temperature rises, the formation water is injected into the hollow cavity of the model holder through the confining pressure hole through the confining pressure tracking pump , so the pressure value of the confining pressure also gradually increases; at the same time, open the regulating valve of the water pumping mechanism, when the pressure of the double-cylinder constant-speed constant-pressure pump shows the predetermined pressure, open the regulating valve of the water pumping mechanism, through the double-cylinder constant pressure The speed and constant pressure pump injects the formation water pumped into the mechanism into the microscopic visual model. The injection speed changes according to the confining pressure. If the confining pressure rises rapidly, the injection speed is adjusted to be fast; As the confining pressure rises, adjust the back pressure valve and increase the back pressure through the manual pump to ensure that the pressure of the water pumped into the microscopic visual model is equal to the pressure of the back pressure, that is, to ensure that the pressure values at the inlet and outlet of the microscopic visual model are equal ; until the temperature reaches a constant temperature, preferably 90°C, the confining pressure is stable, and the confining pressure reaches the predetermined pressure, at this time the pressure at the inlet and outlet of the microscopic visual model is also the predetermined pressure;

(三)关闭二氧化碳泵入机构、水泵入机构的调节阀,当所述双缸恒速恒压泵压力显示为预定压力时,打开油泵入机构的调节阀,通过双缸恒速恒压泵向微观可视模型中注入油泵入机构中的原油,对所述微观可视模型进行饱和油,至所述微观可视模型出口处无水流出为止;并通过录像仪和图像显示器,对微观可视模型进行观测和录像,记录微观可视模型的饱和油的状态;(3) Close the regulating valves of the carbon dioxide pumping mechanism and the water pumping mechanism. When the pressure of the double-cylinder constant-speed and constant-pressure pump is shown as a predetermined pressure, open the regulating valve of the oil pumping mechanism, and pass the double-cylinder constant-speed and constant-pressure pump to the Inject oil into the crude oil pumped into the microscopic visual model, and saturate the microscopic visual model with oil until no water flows out at the outlet of the microscopic visual model; The model conducts observations and video recordings to record the state of saturated oil in the microscopic visual model;

(四)关闭油泵入机构的调节阀,打开二氧化碳气瓶,使二氧化碳气体进入到二氧化碳泵入机构,当所述双缸恒速恒压泵压力显示为预定压力时,打开二氧化碳泵入机构的调节阀,以第一预定速度把二氧化碳泵入机构中二氧化碳气体注入微观可视模型中,进行二氧化碳驱替实验,流出液进入气液分离器后,气体上升经第二气体流量计测量得到微观可视模型里面流出的气体量,油靠重力沿管壁下滑到气液分离器的下部,流至储液烧杯,通过分析天平测量微观可视模型里面流出的油量;当二氧化碳注入量达到第一预定注入量后,二氧化碳驱替模拟结束,通过图像采集系统对二氧化碳驱替模拟过程中沥青质的析出位置以及微观可视模型中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录;通过第一气体流量计和第二气体流量计准确测量出二氧化碳气体的消耗量;(4) Close the regulating valve of the oil pumping mechanism, open the carbon dioxide gas cylinder, so that the carbon dioxide gas enters the carbon dioxide pumping mechanism, and when the pressure of the double-cylinder constant speed and constant pressure pump shows a predetermined pressure, open the adjustment of the carbon dioxide pumping mechanism Valve, pump carbon dioxide into the mechanism at the first predetermined speed and inject carbon dioxide gas into the microscopic visual model for carbon dioxide displacement experiments. After the effluent enters the gas-liquid separator, the gas rises and is measured by the second gas flowmeter to obtain microscopic visual The amount of gas flowing out of the model, the oil slides along the pipe wall to the lower part of the gas-liquid separator by gravity, flows to the liquid storage beaker, and measures the amount of oil flowing out of the microscopic visual model through an analytical balance; when the injection amount of carbon dioxide reaches the first predetermined After injecting the amount, the carbon dioxide displacement simulation is over, and the asphaltene precipitation position during the carbon dioxide displacement simulation process, as well as the remaining oil distribution, remaining oil form and marked characteristic areas in the microscopic visual model are displayed and recorded through the image acquisition system; Accurately measure the consumption of carbon dioxide gas through the first gas flow meter and the second gas flow meter;

(五)关闭二氧化碳泵入机构的调节阀,保证微观可视模型在预定压力和定温,恒温静置1天,并且每6个小时通过图像采集系统对微观可视模型中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录,以观察沥青质析出位置;在此期间随时观察温度控制系统和压力监测系统的精密压力表,保证微观可视模型始终处于恒定的高温高压环境;(5) Close the regulating valve of the carbon dioxide pumping mechanism to ensure that the microscopic visual model is at a predetermined pressure and constant temperature, and stand at a constant temperature for 1 day, and use the image acquisition system to monitor the remaining oil distribution and residual oil in the microscopic visual model every 6 hours. The oil form and marked characteristic areas are displayed and recorded to observe the asphaltene precipitation position; during this period, the precision pressure gauges of the temperature control system and pressure monitoring system are observed at any time to ensure that the microscopic visual model is always in a constant high temperature and high pressure environment;

(六)打开二氧化碳泵入机构的调节阀,对微观可视模型继续进行二氧化碳驱,即当所述双缸恒速恒压泵压力显示为预定压力时,打开二氧化碳泵入机构的调节阀,以第二预定速度把二氧化碳泵入机构中二氧化碳气体注入微观可视模型中,进行二氧化碳驱替实验,当二氧化碳的注入量达到第二预定注入量后,二氧化碳驱结束,同样通过图像采集系统记录后续二氧化碳驱过程;(6) Open the regulating valve of the carbon dioxide pumping mechanism, and continue to carry out carbon dioxide flooding to the microscopic visual model, that is, when the pressure of the double-cylinder constant-speed constant-pressure pump is shown as a predetermined pressure, open the regulating valve of the carbon dioxide pumping mechanism to The second preset speed pumps carbon dioxide into the mechanism and injects carbon dioxide gas into the microscopic visual model to carry out the carbon dioxide displacement experiment. When the injection amount of carbon dioxide reaches the second predetermined injection amount, the carbon dioxide flooding ends, and the subsequent carbon dioxide is also recorded through the image acquisition system drive process;

(七)实验结束后,通过温度控制系统缓慢降低微观可视模型的温度,待温度降到室温后缓慢降压,保证微观可视模型的围压、进口压力 、出口压力同时降低;对实验结果整理、分析。(7) After the experiment is over, slowly reduce the temperature of the microscopic visual model through the temperature control system, and slowly reduce the pressure after the temperature drops to room temperature, so as to ensure that the confining pressure, inlet pressure, and outlet pressure of the microscopic visual model are reduced at the same time; the experimental results Organize and analyze.

其中,第一预定速度和第二预定速度为0.008mL/min;第一预定注入量和第二预定注入量为1.0倍孔隙体积,即1.0PV。Wherein, the first predetermined speed and the second predetermined speed are 0.008mL/min; the first predetermined injection volume and the second predetermined injection volume are 1.0 times the pore volume, that is, 1.0PV.

本发明的上述技术方案的有益效果如下:The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

1、本发明能够在高温高压条件下进行二氧化碳驱超稠油可视化微观实验,能便捷和有效的根据实际油藏温度和压力条件选择二氧化碳驱稠油可视化微观模型的实验温度和围压大小。1. The present invention can carry out visual microscopic experiments of carbon dioxide flooding super heavy oil under high temperature and high pressure conditions, and can conveniently and effectively select the experimental temperature and confining pressure of the visual microscopic model of carbon dioxide flooding heavy oil according to actual reservoir temperature and pressure conditions.

2、本实验装置根据实际油藏条件,控制温度和压力技术简便,使用空间小,安全性能优越,操作简便,便于在可视化条件下观察二氧化碳与石油烃的作用机理,及沥青质的析出情况,对微观实验在石油行业中的广泛应用和推广具有重要意义。2. According to the actual reservoir conditions, this experimental device is simple in temperature and pressure control technology, small in use space, superior in safety performance, easy to operate, and easy to observe the mechanism of action between carbon dioxide and petroleum hydrocarbons and the precipitation of asphaltenes under visual conditions. It is of great significance to the wide application and promotion of microscopic experiments in the petroleum industry.

附图说明Description of drawings

图1为本发明的高温高压二氧化碳驱超稠油可视化微观实验装置结构示意图;Fig. 1 is a schematic structural diagram of a high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization micro-experimental device of the present invention;

图2为本发明的模型夹持器结构示意图。Fig. 2 is a structural schematic diagram of the model holder of the present invention.

其中:1-二氧化碳气瓶;2-调压阀;3-第一气体流量计;4-单向阀;5-压力表;6-二氧化碳泵入机构;7-水泵入机构;8-油泵入机构;9-录像仪;10-温度控制系统;11-测温探头;12-图像显示器;13-第二气体流量计;14-干燥剂; 15-气液分料器;16-储液烧杯;17-分析天平;18-回压缓冲罐;19-手动泵;20- 真空容器;21-真空泵;22-双缸恒速恒压泵;23-围压跟踪泵;24-模型夹持器; 25-去离子水;26-阀门;27-回压阀;28-光源;29-上石英玻璃;30-微观可视模型;31-流体流入孔;32-测温孔;33-围压孔;34-流体流出孔;35-缸体;36-下石英玻璃;37-下密封盖;38-上密封盖。Among them: 1-carbon dioxide cylinder; 2-pressure regulating valve; 3-first gas flow meter; 4-one-way valve; 5-pressure gauge; 6-carbon dioxide pumping mechanism; 7-water pumping mechanism; 8-oil pumping Mechanism; 9-video recorder; 10-temperature control system; 11-temperature measuring probe; 12-image display; 13-second gas flowmeter; 14-desiccant; 15-gas-liquid distributor; 16-liquid storage beaker ;17-analytical balance; 18-back pressure buffer tank; 19-manual pump; 20-vacuum container; 21-vacuum pump; 22-double cylinder constant speed and constant pressure pump; ; 25-deionized water; 26-valve; 27-back pressure valve; 28-light source; 29-upper quartz glass; 30-microscopic visual model; 31-fluid inflow hole; Hole; 34-fluid outflow hole; 35-cylinder body; 36-lower quartz glass; 37-lower sealing cover; 38-upper sealing cover.

具体实施方式Detailed ways

为使本发明要解决的技术问题、技术方案和优点更加清楚,下面将结合附图及具体实施例进行详细描述。In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

本发明提供一种高温高压二氧化碳驱超稠油可视化微观实验装置及方法。The invention provides a high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization micro-experiment device and method.

如图1所示,该装置中模型夹持器24是该实验系统的核心,其主要作用是为微观可视模型30提供高压外部环境,以及合适的恒温条件,同时,提供外接管线与模型夹持器24的接口,实现利用普通的微观实验模型就能够进行地层条件下的各种实验研究。通过石英玻璃提供的上、下观察窗口可观察到微观可视模型30中流体流动、沥青质析出的位置、形态等情况。模型夹持器24 包括缸体35,缸体35上具有流体流入孔31、流体流出孔34、围压孔33以及测温孔32;微观可视模型30位于缸体35中部,微观可视模型30设有进口和出口,流体流入孔31与进口相通,流体流出孔34与出口相通,测温孔32设置在流体流入孔31下方,围压孔33设置在流体流出孔34下方;As shown in Figure 1, the model holder 24 in this device is the core of the experimental system, and its main function is to provide a high-pressure external environment and a suitable constant temperature condition for the microscopic visual model 30. At the same time, it provides external pipelines and model holders. The interface of the holder 24 is used to realize various experimental studies under formation conditions by using common microscopic experimental models. Through the upper and lower observation windows provided by the quartz glass, the fluid flow in the microscopic visualization model 30 , the position and form of asphaltene precipitation, etc. can be observed. The model holder 24 includes a cylinder body 35, which has a fluid inflow hole 31, a fluid outflow hole 34, a confining pressure hole 33, and a temperature measurement hole 32; the microscopic visual model 30 is located in the middle of the cylinder body 35, and the microscopic visual model 30 is provided with an inlet and an outlet, the fluid inflow hole 31 communicates with the inlet, the fluid outflow hole 34 communicates with the outlet, the temperature measuring hole 32 is arranged under the fluid inflow hole 31, and the confining pressure hole 33 is arranged under the fluid outflow hole 34;

驱替系统为整个高温高压装置的动力源,包括二氧化碳气瓶1、第一气体流量计3,双缸恒速恒压泵22、二氧化碳泵入机构6、水泵入机构7以及油泵入机构8,二氧化碳气瓶1通过第一气体流量计3与二氧化碳泵入机构6连接,用于将二氧化碳输送到二氧化碳泵入机构6的活塞上部,二氧化碳泵入机构6、水泵入机构7以及油泵入机构8分别与模型夹持器24的流体流入孔31连接,并通过双缸恒速恒压泵22将二氧化碳泵入机构6中的二氧化碳、水泵入机构 7中的水以及油泵入机构8中的油通过流体流入孔31泵入到微观可视模型30 中,二氧化碳泵入机构6、水泵入机构7和油泵入机构8下部管道通入去离子水25中;第一气体流量计3用于测量气体的注入量;二氧化碳泵入机构6、水泵入机构7和油泵入机构8内含活塞,实验用流体(二氧化碳、地层水、原油)储存在二氧化碳泵入机构6、水泵入机构7和油泵入机构8的活塞上部,双缸恒速恒压泵22作用把压力流体泵入中间容器下部并推动活塞上移,实验用流体通过管线以预定压力,比如15MPa流入夹持器流体流入孔31,进入所述微观可视模型30进口,流经微观可视模型30后,通过所述微观可视模型 30的出口,经模型夹持器24的流体流出孔34流出,再经过回压阀27流入气液分离器15。The displacement system is the power source of the entire high-temperature and high-pressure device, including a carbon dioxide cylinder 1, a first gas flow meter 3, a double-cylinder constant-speed constant-pressure pump 22, a carbon dioxide pumping mechanism 6, a water pumping mechanism 7, and an oil pumping mechanism 8. The carbon dioxide gas cylinder 1 is connected with the carbon dioxide pumping mechanism 6 through the first gas flow meter 3, and is used to transport carbon dioxide to the piston upper part of the carbon dioxide pumping mechanism 6. The carbon dioxide pumping mechanism 6, the water pumping mechanism 7 and the oil pumping mechanism 8 are respectively It is connected with the fluid inflow hole 31 of the model holder 24, and the carbon dioxide pumped into the carbon dioxide in the mechanism 6, the water in the water pumped into the mechanism 7, and the oil in the oil pumped into the mechanism 8 are passed through the fluid through the double-cylinder constant speed and constant pressure pump 22 The inflow hole 31 is pumped into the microscopic visual model 30, and the lower pipes of the carbon dioxide pumping mechanism 6, the water pumping mechanism 7 and the oil pumping mechanism 8 are passed into the deionized water 25; the first gas flow meter 3 is used to measure the injection of gas amount; the carbon dioxide pumping mechanism 6, the water pumping mechanism 7 and the oil pumping mechanism 8 contain pistons, and the experimental fluid (carbon dioxide, formation water, crude oil) is stored in the carbon dioxide pumping mechanism 6, the water pumping mechanism 7 and the oil pumping mechanism 8 On the upper part of the piston, the double-cylinder constant-speed constant-pressure pump 22 functions to pump the pressure fluid into the lower part of the intermediate container and push the piston upward. The experimental fluid flows into the fluid inlet hole 31 of the holder through the pipeline at a predetermined pressure, such as 15MPa, and enters the microscopic The inlet of the visual model 30, after flowing through the microscopic visual model 30, passes through the outlet of the microscopic visual model 30, flows out through the fluid outflow hole 34 of the model holder 24, and then flows into the gas-liquid separator through the back pressure valve 27 15.

回压系统与模型夹持器24的流体流出孔34连通,以使所述微观可视模型 30的出口增压到预定的压力;回压系统包括手动泵19和回压缓冲罐18,手动泵19和回压缓冲罐18之间设置阀门26;手动泵19将液体直接打入回压缓冲罐18中,通过活塞将罐中的流体打入微观可视模型30,使微观可视模型30 出口增压到预定压力,比如15MPa,保证微观可视模型的进口、出口的压力相等,进而维护微观可视模型30的完整性,回压缓冲罐18主要是用来缓冲压力的波动,起到了稳压卸荷的作用。The back pressure system communicates with the fluid outflow hole 34 of the model holder 24, so that the outlet of the microscopic visual model 30 is pressurized to a predetermined pressure; the back pressure system includes a manual pump 19 and a back pressure buffer tank 18, and the manual pump A valve 26 is set between 19 and the back pressure buffer tank 18; the manual pump 19 directly injects the liquid into the back pressure buffer tank 18, and the fluid in the tank is driven into the microscopic visual model 30 through the piston, so that the microscopic visual model 30 is exported Pressurize to a predetermined pressure, such as 15MPa, to ensure that the inlet and outlet pressures of the microscopic visual model are equal, and then maintain the integrity of the microscopic visual model 30. The back pressure buffer tank 18 is mainly used to buffer pressure fluctuations and play a role in stabilizing Pressure unloading effect.

围压系统由围压跟踪泵23构成,围压跟踪泵23为电子数字显示泵,可实时跟踪压力的变化,围压跟踪泵23与模型夹持器24的围压孔33连通,使所述微观可视模型30始终处于预定压力的环境中;围压跟踪泵23为模型夹持器 24内提供压力源,这个压力能为微观可视模型30外部提供围压,比如15Mpa。保证微观可视模型的流动模拟地层环境,在一个高温高压环境下进行;且可以为微观可视模型30紧紧压在缸体中部的固定架上,保证密封。The confining pressure system is composed of a confining pressure tracking pump 23. The confining pressure tracking pump 23 is an electronic digital display pump that can track pressure changes in real time. The confining pressure tracking pump 23 communicates with the confining pressure hole 33 of the model holder 24 to make the The microscopic visual model 30 is always in a predetermined pressure environment; the confining pressure tracking pump 23 provides a pressure source for the model holder 24, and this pressure can provide a confining pressure for the external of the microscopic visual model 30, such as 15Mpa. To ensure the flow of the microscopic visual model to simulate the formation environment, it is carried out in a high temperature and high pressure environment; and the microscopic visual model 30 can be tightly pressed on the fixed frame in the middle of the cylinder to ensure sealing.

压力监测系统用于监测围压压力、回压压力以及微观可视模型进口和出口的压力,保证整个高温高压实验过程的运行性和安全性;The pressure monitoring system is used to monitor the confining pressure, back pressure, and the pressure at the inlet and outlet of the microscopic visual model to ensure the operation and safety of the entire high temperature and high pressure experiment process;

温度控制系统10通过测温探头11与测温孔32连通,为模型夹持器24内部的微观可视模型30提供一个定温环境;The temperature control system 10 communicates with the temperature measuring hole 32 through the temperature measuring probe 11 to provide a constant temperature environment for the microscopic visual model 30 inside the model holder 24;

气液分离系统包括气液分离器15、储液烧杯16、分析天平17、干燥剂14 以及第二气体流量计13,油气混合物进入到气液分离器15后,气体上升通过干燥剂14,经第二气体流量计13测量得到微观可视模型30里面流出的气体量,油靠重力沿管壁下滑到气液分离器15的下部,流至储液烧杯16,通过分析天平17测量微观可视模型30里面流出的油量;通过第一气体流量计3和第二气体流量计13准确测量出二氧化碳气体的消耗量;测量二氧化碳是为了解二氧化碳与稠油之间的作用机理,将出来的油用气相色谱进行定性分析,以得到作用机理。The gas-liquid separation system includes a gas-liquid separator 15, a liquid storage beaker 16, an analytical balance 17, a desiccant 14, and a second gas flow meter 13. After the oil-gas mixture enters the gas-liquid separator 15, the gas rises through the desiccant 14, and passes through the desiccant 14. The second gas flow meter 13 measures the amount of gas flowing out of the microscopic visual model 30, and the oil slides down the tube wall to the lower part of the gas-liquid separator 15 by gravity, flows to the liquid storage beaker 16, and is measured by the analytical balance 17. The amount of oil flowing out of the model 30; the consumption of carbon dioxide gas is accurately measured by the first gas flowmeter 3 and the second gas flowmeter 13; the measurement of carbon dioxide is to understand the mechanism of action between carbon dioxide and heavy oil, and the oil that will come out Qualitative analysis was carried out by gas chromatography to obtain the mechanism of action.

图像采集系统用于实时显示和记录微观可视模型30内的流动状态;The image acquisition system is used to display and record the flow state in the microscopic visual model 30 in real time;

所述可视化微观实验装置还包括回压阀27,流体流出孔34引出的管路其中一支通过回压阀27分别连接回压系统的回压缓冲罐18和气液分离系统的气液分离器15,另一支管路接入真空容器20,真空容器20与真空泵21相连。The visualized microscopic experimental device also includes a back pressure valve 27, wherein one of the pipelines drawn from the fluid outflow hole 34 is respectively connected to the back pressure buffer tank 18 of the back pressure system and the gas-liquid separator 15 of the gas-liquid separation system through the back pressure valve 27 , the other branch line is connected to the vacuum container 20, and the vacuum container 20 is connected to the vacuum pump 21.

二氧化碳气瓶1和第一气体流量计3之间设置调压阀2,第一气体流量计 3后设置单向阀4,二氧化碳泵入机构6、水泵入机构7和油泵入机构8之前均设有压力表5。A pressure regulating valve 2 is set between the carbon dioxide gas cylinder 1 and the first gas flow meter 3, a check valve 4 is set behind the first gas flow meter 3, and a carbon dioxide pumping mechanism 6, a water pumping mechanism 7 and an oil pumping mechanism 8 are all set before the carbon dioxide gas cylinder 1 and the first gas flow meter 3. There are pressure gauges 5.

图像采集系统包括光源28、录像仪9、图像显示器12和支架;模型夹持器24固定在支架上,支架底座上设置有光源28;模型夹持器24上端连接录像仪9,录像仪与图像显示器12相连。打开平面光源28后,光线透过模型夹持器24下石英玻璃36、微观可视模型30、上石英玻璃29后,微观可视模型 30内流体流动状态通过CDD录像仪9捕获、放大、成像,并在图像显示器 12上显示和记录,作为后期实验现象分析资料。Image acquisition system comprises light source 28, video recorder 9, image display 12 and support; Model holder 24 is fixed on the support, and light source 28 is arranged on the support base; Model holder 24 upper ends connect video recorder 9, video recorder and image Display 12 is connected. After the plane light source 28 is turned on, the light passes through the lower quartz glass 36 of the model holder 24, the microscopic visual model 30, and the upper quartz glass 29, and the fluid flow state in the microscopic visual model 30 is captured, amplified, and imaged by the CDD video recorder 9 , and displayed and recorded on the image display 12, as the later stage experimental phenomenon analysis data.

模型夹持器24还包括具有上观察窗口的夹持器上密封盖38、具有下观察窗口的夹持器下密封盖37、上石英玻璃29和下石英玻璃36,微观可视模型 30放置在上密封盖38和下密封盖37之间,上密封盖38和下密封盖37内分别镶嵌上石英玻璃29和下石英玻璃36,通过上、下观察窗口及上下石英玻璃观察所述微观可视模型30中的流体流动状态。The model holder 24 also includes a holder upper sealing cover 38 with an upper viewing window, a lower sealing cover 37 of the holder with a lower viewing window, upper quartz glass 29 and lower quartz glass 36, and the microscopic visual model 30 is placed on Between the upper sealing cover 38 and the lower sealing cover 37, the upper sealing cover 38 and the lower sealing cover 37 are inlaid with upper quartz glass 29 and lower quartz glass 36 respectively, and observe the microscopic visible through the upper and lower observation windows and the upper and lower quartz glass. Fluid flow regime in model 30.

微观可视模型30为透明的二维平面模型,通过把天然岩心的孔隙系统光刻蚀到平面玻璃上并烧结成型而制成,并在模型的相对两角处分别打一小孔,分别为所述模型的进口和出口,模拟注入井和采出井,实现几何形态和驱替过程的仿真。The microscopic visual model 30 is a transparent two-dimensional plane model, which is made by photoetching the pore system of the natural rock core onto the flat glass and sintering it into shape, and punching a small hole at two opposite corners of the model, respectively The inlet and outlet of the model simulate injection wells and production wells to realize the simulation of geometry and displacement process.

在实验中,预定压力为15MPa。所采用超稠油粘度在20000~40000mPa.s。In the experiment, the predetermined pressure was 15MPa. The viscosity of the super heavy oil used is 20000-40000mPa.s.

采用该装置进行模拟实验时,包括如下步骤:When using this device to carry out simulation experiments, the following steps are included:

(一)打开所述模型夹持器24的上密封盖38,将模型夹持器24下缸体内加满去离子水,保证微观可视模型30的进口和出口处没有气体的情况下,将微观可视模型30放置在所述缸体35内壁中部环状台阶上,放置过程中避免下缸体与微观可视模型30之间出现气泡,且微观可视模型30的进口、出口与流体流入孔31、流体流出孔34相对并且相通;微观可视模型30放置好后,再将上缸体内添加去离子水,优选为约2cm高度,放空状态下缓慢拧紧夹持器上密封盖38,保证气泡完全排除后,关闭模型夹持器24放空阀;模型夹持器24中有气泡时,利用真空泵21以及真空容器20抽真空排除气泡并且关闭阀门;此时,驱替系统中的双缸恒速恒压泵22、二氧化碳泵入机构6、水泵入机构7以及油泵入机构8、微观可视模型30与回压阀27、气液分离系统组合成一个密闭流动空间;(1) Open the upper sealing cover 38 of the model holder 24, fill up the deionized water in the lower cylinder body of the model holder 24, and ensure that there is no gas at the inlet and outlet of the microscopic visual model 30, Place the microscopic visual model 30 on the ring-shaped step in the middle part of the inner wall of the cylinder body 35, avoid air bubbles between the lower cylinder body and the microscopic visual model 30 during placement, and the inlet and outlet of the microscopic visual model 30 are in contact with the fluid The inflow hole 31 and the fluid outflow hole 34 are opposite and connected; after the microscopic visual model 30 is placed, add deionized water to the upper cylinder body, preferably at a height of about 2 cm, and slowly tighten the upper sealing cover 38 of the holder in the empty state After ensuring that the air bubbles are completely removed, close the model holder 24 vent valve; when there are air bubbles in the model holder 24, use the vacuum pump 21 and the vacuum container 20 to evacuate the air bubbles and close the valve; Cylinder constant speed and constant pressure pump 22, carbon dioxide pumping mechanism 6, water pumping mechanism 7 and oil pumping mechanism 8, microscopic visual model 30, back pressure valve 27, and gas-liquid separation system are combined to form a closed flow space;

(二)打开温度控制系统10,对微观可视模型30进行定温加热,优选为 90℃,随着温度的上升,通过围压跟踪泵23将地层水通过围压孔33注入模型夹持器24的中空腔体中,因此围压压力值也逐渐升高;同时,打开水泵入机构7的调节阀,当双缸恒速恒压泵22压力显示为预定压力时,打开水泵入机构7的调节阀,通过所述双缸恒速恒压泵22把水泵入机构7中的地层水注入微观可视模型内,注入速度根据围压改变,围压快速升高,注入速度调快;围压缓慢升高,注入速度调慢,随着围压的升高,调整回压阀27,通过手动泵 19增加回压,保证水泵入机构7注入微观可视模型30的压力与回压的压力相等,即保证微观可视模型30的进口、出口的压力值相等;直到温度达到定温,优选为90℃,围压稳定,围压达到预定压力,这时微观可视模型30进口、出口的压力也为预定压力;(2) Turn on the temperature control system 10, and heat the microscopic visual model 30 at a constant temperature, preferably 90°C. As the temperature rises, the formation water is injected into the model holder 24 through the confining pressure hole 33 by the confining pressure tracking pump 23 Therefore, the pressure value of the confining pressure also gradually increases; at the same time, open the regulating valve of the water pumping mechanism 7, and when the pressure of the double-cylinder constant-speed constant-pressure pump 22 shows the predetermined pressure, open the regulating valve of the water pumping mechanism 7 Valve, through the double-cylinder constant-speed constant-pressure pump 22, the formation water pumped into the mechanism 7 is injected into the microscopic visual model, the injection speed changes according to the confining pressure, the confining pressure rises rapidly, and the injection speed is adjusted fast; increase, the injection speed is slowed down, and as the confining pressure increases, adjust the back pressure valve 27, increase the back pressure through the manual pump 19, and ensure that the pressure of the water pumping mechanism 7 injected into the microscopic visual model 30 is equal to the pressure of the back pressure, That is to ensure that the pressure values at the inlet and outlet of the microscopic visual model 30 are equal; until the temperature reaches a constant temperature, preferably 90°C, the confining pressure is stable, and the confining pressure reaches a predetermined pressure, then the pressure at the inlet and outlet of the microscopic visual model 30 is also predetermined pressure;

(三)关闭二氧化碳泵入机构6、水泵入机构7的调节阀,当所述双缸恒速恒压泵22压力显示为预定压力时,打开油泵入机构8的调节阀,通过双缸恒速恒压泵22向微观可视模型30中注入油泵入机构8中的原油,对所述微观可视模型30进行饱和油,至所述微观可视模型30出口处无水流出为止;并通过录像仪9和图像显示器12,对微观可视模型30进行观测和录像,记录微观可视模型30的饱和模拟油的状态;(3) Close the regulating valves of the carbon dioxide pumping mechanism 6 and the water pumping mechanism 7. When the pressure of the double-cylinder constant-speed and constant-pressure pump 22 pressure is shown as a predetermined pressure, open the regulating valve of the oil pumping mechanism 8 to pass through the double-cylinder constant-speed The constant pressure pump 22 injects the crude oil in the oil pump mechanism 8 into the microscopic visual model 30, and saturates the microscopic visual model 30 until no water flows out at the outlet of the microscopic visual model 30; Instrument 9 and image display 12 observe and record the microscopic visual model 30, and record the state of the saturated simulated oil of the microscopic visual model 30;

(四)关闭油泵入机构8的调节阀,打开二氧化碳气瓶1,使二氧化碳气体进入到二氧化碳泵入机构6,当所述双缸恒速恒压泵22压力显示为预定压力时,打开二氧化碳泵入机构6的调节阀,以第一预定速度把二氧化碳泵入机构6中二氧化碳气体注入微观可视模型30中,进行二氧化碳驱替实验,流出液进入气液分离器15后,气体上升经第二气体流量计13测量得到微观可视模型30里面流出的气体量,油靠重力沿管壁下滑到气液分离器15的下部,流至储液烧杯16,通过分析天平17测量微观可视模型30里面流出的油量;当二氧化碳注入量达到第一预定注入量后,二氧化碳驱替模拟结束,通过图像采集系统对二氧化碳驱替模拟过程中沥青质的析出位置以及微观可视模型30中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录;通过第一气体流量计3和第二气体流量计13准确测量出二氧化碳气体的消耗量;(4) Close the regulating valve of the oil pumping mechanism 8, open the carbon dioxide gas cylinder 1, so that the carbon dioxide gas enters the carbon dioxide pumping mechanism 6, and when the pressure of the double-cylinder constant speed and constant pressure pump 22 is shown as a predetermined pressure, open the carbon dioxide pump The regulating valve of the mechanism 6 is used to pump carbon dioxide gas into the mechanism 6 at the first predetermined speed and inject the carbon dioxide gas into the microscopic visual model 30 to carry out the carbon dioxide displacement experiment. After the effluent enters the gas-liquid separator 15, the gas rises through the second The gas flowmeter 13 measures the amount of gas flowing out of the microscopic visual model 30, and the oil slides down the tube wall to the lower part of the gas-liquid separator 15 by gravity, and flows to the liquid storage beaker 16, and the microscopic visual model 30 is measured by the analytical balance 17 The amount of oil flowing out of it; when the carbon dioxide injection amount reaches the first predetermined injection amount, the carbon dioxide displacement simulation ends, and the asphaltene precipitation position and the remaining oil in the microscopic visual model 30 are analyzed by the image acquisition system during the carbon dioxide displacement simulation process The distribution, remaining oil form and marked characteristic areas are displayed and recorded; the consumption of carbon dioxide gas is accurately measured through the first gas flow meter 3 and the second gas flow meter 13;

(五)关闭二氧化碳泵入机构6的调节阀,保证微观可视模型30在预定压力和定温,恒温静置1天,并且每6个小时通过图像采集系统对微观可视模型30中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录,以观察沥青质析出位置;在此期间随时观察温度控制系统10和压力监测系统的精密压力表,保证微观可视模型30始终处于恒定的高温高压环境;(5) Close the regulating valve of the carbon dioxide pumping mechanism 6 to ensure that the microscopic visual model 30 is at a predetermined pressure and constant temperature, and stand at a constant temperature for 1 day, and check the remaining oil in the microscopic visual model 30 by the image acquisition system every 6 hours distribution, remaining oil form, and marked characteristic areas are displayed and recorded to observe the asphaltene precipitation position; during this period, the precision pressure gauges of the temperature control system 10 and pressure monitoring system are observed at any time to ensure that the microscopic visual model 30 is always at a constant High temperature and high pressure environment;

(六)打开二氧化碳泵入机构6的调节阀,对微观可视模型30继续进行二氧化碳驱,即当所述双缸恒速恒压泵22压力显示为预定压力时,打开二氧化碳泵入机构6的调节阀,以第二预定速度把二氧化碳泵入机构6中二氧化碳气体注入微观可视模型30中,进行二氧化碳驱替实验,当二氧化碳的注入量达到第二预定注入量后,二氧化碳驱结束,同样通过图像采集系统记录后续二氧化碳驱过程;(6) Open the regulating valve of the carbon dioxide pumping mechanism 6, and continue to carry out carbon dioxide flooding to the microscopic visual model 30, that is, when the pressure of the double-cylinder constant speed and constant pressure pump 22 is shown as a predetermined pressure, open the valve of the carbon dioxide pumping mechanism 6 Adjust the valve to pump carbon dioxide gas into the mechanism 6 at the second predetermined speed and inject carbon dioxide gas into the microscopic visual model 30 to carry out the carbon dioxide displacement experiment. When the injection amount of carbon dioxide reaches the second predetermined injection amount, the carbon dioxide flooding ends, and the The image acquisition system records the subsequent carbon dioxide flooding process;

(七)实验结束后,通过温度控制系统10缓慢降低微观可视模型30的温度,待温度降到室温后缓慢降压,保证微观可视模型30的围压、进口压力 、出口压力同时降低;对实验结果整理、分析。(7) After the experiment ends, slowly reduce the temperature of the microscopic visual model 30 through the temperature control system 10, and slowly step down the pressure after the temperature drops to room temperature, so as to ensure that the confining pressure, inlet pressure, and outlet pressure of the microscopic visual model 30 are reduced simultaneously; Organize and analyze the experimental results.

其中,第一预定速度和第二预定速度为0.008mL/min;第一预定注入量和第二预定注入量为1.0PV。Wherein, the first predetermined speed and the second predetermined speed are 0.008 mL/min; the first predetermined injection volume and the second predetermined injection volume are 1.0 PV.

以上所述是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明所述原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (6)

1.一种高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:1. A high-temperature and high-pressure carbon dioxide flooding super heavy oil visualization micro-experimental device is characterized in that: 该方法所应用的装置包括夹持有微观可视模型的模型夹持器(24)、驱替系统、回压系统、围压系统、压力监测 系统、温度控制系统(10)、气液分离系统以及图像采集系统;其中:The device used in the method includes a model holder (24) holding a microscopic visual model, a displacement system, a back pressure system, a confining pressure system, a pressure monitoring system, a temperature control system (10), a gas-liquid separation system and an image acquisition system; wherein: 模型夹持器(24)包括缸体(35),缸体(35)上具有流体流入孔(31)、流体流出孔(34)、围压孔(33)以及测温孔(32);微观可视模型(30)位于缸体(35)中部,微观可视模型(30)设有进口和出口,流体流入孔(31)与进口相通,流体流出孔(34)与出口相通;Model holder (24) comprises cylinder body (35), has fluid inflow hole (31), fluid outflow hole (34), confining pressure hole (33) and temperature measurement hole (32) on the cylinder body (35); The visual model (30) is located in the middle of the cylinder body (35), the microscopic visual model (30) is provided with an inlet and an outlet, the fluid inflow hole (31) communicates with the inlet, and the fluid outflow hole (34) communicates with the outlet; 驱替系统包括二氧化碳气瓶(1)、第一气体流量计(3),双缸恒速恒压泵(22)、二氧化碳泵入机构(6)、水泵入机构(7)以及油泵入机构(8),二氧化碳气瓶(1)通过第一气体流量计(3)与二氧化碳泵入机构(6)连接,二氧化碳泵入机构(6)、水泵入机构(7)以及油泵入机构(8)分别与模型夹持器(24)的流体流入孔(31)连接,并通过双缸恒速恒压泵(22)将二氧化碳泵入机构(6)中的二氧化碳、水泵入机构(7)中的水以及油泵入机构(8)中的油通过流体流入孔(31)泵入到微观可视模型(30)中,二氧化碳泵入机构(6)、水泵入机构(7)和油泵入机构(8)下部管道通入去离子水(25)中;The displacement system includes a carbon dioxide gas cylinder (1), a first gas flow meter (3), a double-cylinder constant speed and constant pressure pump (22), a carbon dioxide pumping mechanism (6), a water pumping mechanism (7) and an oil pumping mechanism ( 8), the carbon dioxide cylinder (1) is connected with the carbon dioxide pumping mechanism (6) through the first gas flow meter (3), and the carbon dioxide pumping mechanism (6), the water pumping mechanism (7) and the oil pumping mechanism (8) respectively Connect with the fluid inflow hole (31) of the model holder (24), and pump carbon dioxide into the carbon dioxide in the mechanism (6) and water into the water in the mechanism (7) through the double-cylinder constant speed and constant pressure pump (22) And the oil in the oil pumping mechanism (8) is pumped into the microcosmic visual model (30) through the fluid inflow hole (31), and the carbon dioxide pumping mechanism (6), the water pumping mechanism (7) and the oil pumping mechanism (8) Lower pipeline passes in the deionized water (25); 回压系统与模型夹持器(24)的流体流出孔(34)连通,回压系统包括手动泵(19)和回压缓冲罐(18),手动泵(19)和回压缓冲罐(18)之间设置阀门(26);The back pressure system communicates with the fluid outflow hole (34) of the model holder (24), the back pressure system includes a hand pump (19) and a back pressure buffer tank (18), the hand pump (19) and the back pressure buffer tank (18 ) between valves (26); 围压系统由围压跟踪泵(23)构成,围压跟踪泵(23)为电子数字显示泵,围压跟踪泵(23)与模型夹持器(24)的围压孔(33)连通,使所述微观可视模型(30)始终处于预定压力的环境中;The confining pressure system consists of a confining pressure tracking pump (23), which is an electronic digital display pump, and the confining pressure tracking pump (23) communicates with the confining pressure hole (33) of the model holder (24), Keeping the microscopic visual model (30) in an environment of predetermined pressure all the time; 压力监测系统用于监测围压压力、回压压力以及微观可视模型进口和出口的压力;The pressure monitoring system is used to monitor the confining pressure, the back pressure and the pressure at the inlet and outlet of the microscopic visual model; 温度控制系统(10)通过测温探头(11)与测温孔(32)连通,为模型夹持器(24)内部的微观可视模型(30)提供一个定温环境;The temperature control system (10) communicates with the temperature measuring hole (32) through the temperature measuring probe (11) to provide a constant temperature environment for the microscopic visual model (30) inside the model holder (24); 气液分离系统包括气液分离器(15)、储液烧杯(16)、分析天平(17)、干燥剂(14)以及第二气体流量计(13),油气混合物进入到气液分离器(15)后,气体上升通过干燥剂(14),经第二气体流量计(13)测量得到微观可视模型(30)里面流出的气体量,油靠重力沿管壁下滑到气液分离器(15)的下部,流至储液烧杯(16),通过分析天平(17)测量微观可视模型(30)里面流出的油量;通过第一气体流量计(3)和第二气体流量计(13)准确测量出二氧化碳气体的消耗量;The gas-liquid separation system comprises a gas-liquid separator (15), a liquid storage beaker (16), an analytical balance (17), a desiccant (14) and a second gas flow meter (13), and the oil-gas mixture enters the gas-liquid separator ( 15), the gas rises through the desiccant (14), and the second gas flow meter (13) measures the amount of gas flowing out of the microscopic visual model (30), and the oil slides down the pipe wall to the gas-liquid separator ( The bottom of 15) flows to the liquid storage beaker (16), and measures the amount of oil flowing out of the inside of the microcosmic visual model (30) by an analytical balance (17); through the first gas flow meter (3) and the second gas flow meter ( 13) Accurately measure the consumption of carbon dioxide gas; 图像采集系统用于实时显示和记录微观可视模型(30)内的流动状态;The image acquisition system is used to display and record the flow state in the microscopic visual model (30) in real time; 所述可视化微观实验装置还包括回压阀(27),流体流出孔(34)引出的管路其中一支通过回压阀(27)分别连接回压系统的回压缓冲罐(18)和气液分离系统的气液分离器(15),另一支管路接入真空容器(20),真空容器(20)与真空泵(21)相连;The visualized micro-experimental device also includes a back pressure valve (27), wherein one of the pipelines drawn from the fluid outflow hole (34) is respectively connected to the back pressure buffer tank (18) and gas-liquid of the back pressure system through the back pressure valve (27). The gas-liquid separator (15) of the separation system, another branch line is connected to the vacuum vessel (20), and the vacuum vessel (20) is connected to the vacuum pump (21); 所述图像采集系统包括光源(28)、录像仪(9)、图像显示器(12)和支架;模型夹持器(24)固定在支架上,支架底座上设置有光源(28);模型夹持器(24)上端连接录像仪(9),录像仪与图像显示器(12)相连;Described image acquisition system comprises light source (28), video recorder (9), image display (12) and support; Model holder (24) is fixed on the support, and support base is provided with light source (28); Model clamping The upper end of the device (24) is connected to the video recorder (9), and the video recorder is connected to the image display (12); 该方法包括如下步骤:The method comprises the steps of: (一)打开所述模型夹持器(24)的上密封盖(38),将模型夹持器(24)下缸体内加满去离子水,保证微观可视模型(30)的进口和出口处没有气体的情况下,将微观可视模型(30)放置在所述缸体(35)内壁中部环状台阶上,放置过程中避免下缸体与微观可视模型(30)之间出现气泡,且微观可视模型(30)的进口、出口与流体流入孔(31)、流体流出孔(34)相对并且相通;微观可视模型(30)放置好后,再将上缸体内添加去离子水,放空状态下缓慢拧紧夹持器上密封盖(38),保证气泡完全排除后,关闭模型夹持器(24)放空阀;模型夹持器(24)中有气泡时,利用真空泵(21)以及真空容器(20)抽真空排除气泡并且关闭模型夹持器(24)放空阀;此时,驱替系统中的双缸恒速恒压泵(22)、二氧化碳泵入机构(6)、水泵入机构(7)以及油泵入机构(8)、微观可视模型(30)与回压阀(27)、气液分离系统组合成一个密闭流动空间;(1) Open the upper seal cover (38) of the model holder (24), fill up the lower cylinder body of the model holder (24) with deionized water, ensure the entrance and When there is no gas at the outlet, place the microscopic visual model (30) on the ring-shaped step in the middle of the inner wall of the cylinder (35), and avoid the gap between the lower cylinder body and the microscopic visual model (30) during placement. Bubbles, and the inlet and outlet of the microscopic visual model (30) are opposite and communicated with the fluid inflow hole (31) and the fluid outflow hole (34); after the microscopic visual model (30) is placed, add Deionized water, slowly tighten the upper sealing cover (38) of the holder in the empty state to ensure that the air bubbles are completely removed, then close the vent valve of the model holder (24); when there are air bubbles in the model holder (24), use a vacuum pump (21) and the vacuum container (20) are vacuumized to get rid of the bubbles and close the model holder (24) vent valve; ), the water pumping mechanism (7), the oil pumping mechanism (8), the microscopic visual model (30), the back pressure valve (27), and the gas-liquid separation system are combined to form a closed flow space; (二)打开温度控制系统(10),对微观可视模型(30)进行定温加热,随着温度的上升,通过围压跟踪泵(23)将地层水通过围压孔(33)注入模型夹持器(24)的中空腔体中,因此围压压力值也逐渐升高;同时,打开水泵入机构(7)的调节阀,当双缸恒速恒压泵(22)压力显示为预定压力时,打开水泵入机构(7)的调节阀,通过所述双缸恒速恒压泵(22)把水泵入机构(7)中的地层水注入微观可视模型(30)内,注入速度根据围压改变,围压快速升高,注入速度调快;围压缓慢升高,注入速度调慢,随着围压的升高,调整回压阀(27),通过手动泵(19)增加回压,保证水泵入机构(7)注入微观可视模型(30)的压力与回压的压力相等,即保证微观可视模型(30)的进口、出口的压力值相等;直到温度达到定温,围压稳定,围压达到预定压力,这时微观可视模型(30)进口、出口的压力也为预定压力;(2) Turn on the temperature control system (10), heat the microscopic visual model (30) at a constant temperature, and as the temperature rises, inject formation water into the model holder through the confining pressure hole (33) through the confining pressure tracking pump (23) In the hollow cavity of the holder (24), the pressure value of the confining pressure also gradually increases; at the same time, the regulating valve of the water pumping mechanism (7) is opened, when the pressure of the double-cylinder constant-speed constant-pressure pump (22) shows the predetermined pressure , open the regulating valve of the water pumping mechanism (7), and inject the formation water in the water pumping mechanism (7) into the microscopic visual model (30) through the double-cylinder constant speed and constant pressure pump (22), and the injection speed is according to When the confining pressure changes, the confining pressure rises rapidly, and the injection speed is increased; when the confining pressure increases slowly, the injection speed is slowed down. ensure that the pressure that the water pumping mechanism (7) injects into the microscopic visual model (30) is equal to the pressure of the back pressure, that is, the pressure values of the inlet and outlet of the microscopic visual model (30) are guaranteed to be equal; until the temperature reaches a constant temperature, the surrounding The pressure is stable, and the confining pressure reaches the predetermined pressure, and at this moment, the pressure of the inlet and outlet of the microscopic visual model (30) is also the predetermined pressure; (三)关闭二氧化碳泵入机构(6)、水泵入机构(7)的调节阀,当所述双缸恒速恒压泵(22)压力显示为预定压力时,打开油泵入机构(8)的调节阀,通过双缸恒速恒压泵(22)向微观可视模型(30)中注入油泵入机构(8)中的原油,对所述微观可视模型(30)进行饱和油,至所述微观可视模型(30)出口处无水流出为止;并通过录像仪(9)和图像显示器(12),对微观可视模型(30)进行观测和录像,记录微观可视模型(30)的饱和油的状态;(3) Close the regulating valves of the carbon dioxide pumping mechanism (6) and the water pumping mechanism (7), and when the pressure of the double-cylinder constant speed and constant pressure pump (22) shows a predetermined pressure, open the valve of the oil pumping mechanism (8) Regulating valve, inject oil into the microcosmic visual model (30) into the crude oil pumped into the mechanism (8) through the double cylinder constant speed and constant pressure pump (22), saturate the microcosmic visual model (30) with oil, to the until no water flows out at the exit of the microscopic visual model (30); state of saturated oil; (四)关闭油泵入机构(8)的调节阀,打开二氧化碳气瓶(1),使二氧化碳气体进入到二氧化碳泵入机构(6),当所述双缸恒速恒压泵(22)压力显示为预定压力时,打开二氧化碳泵入机构(6)的调节阀,以第一预定速度把二氧化碳泵入机构(6)中二氧化碳气体注入微观可视模型(30)中,进行二氧化碳驱替实验,流出液进入气液分离器(15)后,气体上升经第二气体流量计(13)测量得到微观可视模型(30)里面流出的气体量,油靠重力沿管壁下滑到气液分离器(15)的下部,流至储液烧杯(16),通过分析天平(17)测量微观可视模型(30)里面流出的油量;当二氧化碳注入量达到第一预定注入量后,二氧化碳驱替模拟结束,通过图像采集系统对二氧化碳驱替模拟过程中沥青质的析出位置以及微观可视模型(30)中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录;通过第一气体流量计(3)和第二气体流量计(13)准确测量出二氧化碳气体的消耗量;(4) Close the regulating valve of the oil pumping mechanism (8), open the carbon dioxide gas cylinder (1), so that carbon dioxide gas enters the carbon dioxide pumping mechanism (6), when the pressure of the double-cylinder constant speed and constant pressure pump (22) shows When the pressure is predetermined, open the regulating valve of the carbon dioxide pumping mechanism (6), inject the carbon dioxide gas in the carbon dioxide pumping mechanism (6) into the microscopic visual model (30) at the first predetermined speed, carry out the carbon dioxide displacement experiment, and flow out After the liquid enters the gas-liquid separator (15), the gas rises and is measured by the second gas flow meter (13) to obtain the amount of gas flowing out of the microscopic visual model (30), and the oil slides along the pipe wall to the gas-liquid separator ( The lower part of 15) flows to the liquid storage beaker (16), and measures the amount of oil flowing out of the microscopic visual model (30) through the analytical balance (17); when the carbon dioxide injection amount reaches the first predetermined injection amount, the carbon dioxide displacement simulation At the end, display and record the asphaltene precipitation position during the carbon dioxide displacement simulation process and the remaining oil distribution, remaining oil form and marked characteristic areas in the microscopic visual model (30) through the image acquisition system; through the first gas flow Meter (3) and the second gas flow meter (13) accurately measure the consumption of carbon dioxide gas; (五)关闭二氧化碳泵入机构(6)的调节阀,保证微观可视模型(30) 在预定压力和定温,恒温静置1天,并且每6个小时通过图像采集系统对微观可视模型(30)中的剩余油分布、剩余油形态以及标注的特征区域进行显示和记录,以观察沥青质析出位置;在此期间随时观察温度控制系统(10)和压力监测系统的精密压力表,保证微观可视模型(30)始终处于恒定的高温高压环境;(5) Close the regulating valve of the carbon dioxide pumping mechanism (6), ensure that the microscopic visual model (30) is at a predetermined pressure and constant temperature, and keep it at a constant temperature for 1 day, and pass the image acquisition system to the microscopic visual model (30) every 6 hours. 30), the distribution of remaining oil, the form of remaining oil, and the marked characteristic areas are displayed and recorded to observe the location of asphaltene precipitation; during this period, the precision pressure gauges of the temperature control system (10) and pressure monitoring system can be observed at any time to ensure microscopic The visual model (30) is always in a constant high temperature and high pressure environment; (六)打开二氧化碳泵入机构(6)的调节阀,对微观可视模型(30)继续进行二氧化碳驱,即当所述双缸恒速恒压泵(22)压力显示为预定压力时,打开二氧化碳泵入机构(6)的调节阀,以第二预定速度把二氧化碳泵入机构(6)中二氧化碳气体注入微观可视模型(30)中,进行二氧化碳驱替实验,当二氧化碳的注入量达到第二预定注入量后,二氧化碳驱结束,同样通过图像采集系统记录后续二氧化碳驱过程;(6) Open the regulating valve of the carbon dioxide pumping mechanism (6), and continue to carry out carbon dioxide flooding to the microcosmic visual model (30), that is, when the pressure of the double-cylinder constant-speed constant-pressure pump (22) shows a predetermined pressure, open The regulating valve of the carbon dioxide pumping mechanism (6) injects the carbon dioxide gas in the carbon dioxide pumping mechanism (6) into the microcosmic visual model (30) at the second predetermined speed to carry out the carbon dioxide displacement experiment. When the injection amount of carbon dioxide reaches the first 2. After the predetermined injection amount, the carbon dioxide flooding ends, and the subsequent carbon dioxide flooding process is also recorded through the image acquisition system; (七)实验结束后,通过温度控制系统(10)缓慢降低微观可视模型(30)的温度,待温度降到室温后缓慢降压,保证微观可视模型(30)的围压、进口压力 、出口压力同时降低;对实验结果整理、分析;(7) After the experiment ends, slowly reduce the temperature of the microscopic visual model (30) through the temperature control system (10), and slowly reduce the pressure after the temperature drops to room temperature to ensure the confining pressure and inlet pressure of the microscopic visual model (30) , the outlet pressure is reduced at the same time; sort out and analyze the experimental results; 超稠油粘度在20000~40000mPa.s。The viscosity of super heavy oil is 20000~40000mPa.s. 2.根据权利要求1所述的高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:所述二氧化碳气瓶(1)和第一气体流量计(3)之间设置调压阀(2),第一气体流量计(3)后设置单向阀(4),二氧化碳泵入机构(6)、水泵入机构(7)和油泵入机构(8)之前均设有压力表(5)。2. the high temperature and high pressure carbon dioxide flooding super heavy oil visualization microscopic experiment device according to claim 1 carries out the method for simulation experiment, it is characterized in that: between described carbon dioxide cylinder (1) and the first gas flow meter (3) A pressure regulating valve (2), a one-way valve (4) is set behind the first gas flowmeter (3), and a pressure valve (4) is set before the carbon dioxide pumping mechanism (6), water pumping mechanism (7) and oil pumping mechanism (8). table 5). 3.根据权利要求1所述的高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:所述模型夹持器(24)还包括上密封盖(38)、下密封盖(37)、上石英玻璃(29)和下石英玻璃(36),微观可视模型(30)放置在上密封盖(38)和下密封盖(37)之间,上密封盖(38)和下密封盖(37)内分别镶嵌上石英玻璃(29)和下石英玻璃(36)。3. the high temperature and high pressure carbon dioxide flooding super heavy oil visualization microscopic experiment device according to claim 1 carries out the method for simulation experiment, it is characterized in that: described model holder (24) also comprises upper sealing cover (38), lower sealing Cover (37), upper quartz glass (29) and lower quartz glass (36), microscopic visual model (30) is placed between upper sealing cover (38) and lower sealing cover (37), upper sealing cover (38) Inlaid with upper quartz glass (29) and lower quartz glass (36) respectively in the lower sealing cover (37). 4.根据权利要求1所述的高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:所述微观可视模型(30)为透明的二维平面模型,通过把天然岩心的孔隙系统光刻蚀到平面玻璃上并烧结成型而制成。4. the method for carrying out the simulation experiment with the high-temperature and high-pressure carbon dioxide flooding super heavy oil visualization micro-experimental device according to claim 1, is characterized in that: the micro-visual model (30) is a transparent two-dimensional plane model, by combining natural The pore system of the core is photoetched onto the flat glass and sintered to form it. 5.根据权利要求1所述的高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:所述预定压力为15MPa。5. The method for performing simulation experiments with the high-temperature and high-pressure carbon dioxide flooding super heavy oil visualization micro-experimental device according to claim 1, characterized in that: the predetermined pressure is 15 MPa. 6.根据权利要求1所述的高温高压二氧化碳驱超稠油可视化微观实验装置进行模拟实验的方法,其特征在于:所述第一预定速度和第二预定速度为0.008mL/min;第一预定注入量和第二预定注入量为1.0PV。6. The method for carrying out simulation experiments with the high-temperature and high-pressure carbon dioxide flooding super-heavy oil visualization microscopic experimental device according to claim 1, characterized in that: the first predetermined speed and the second predetermined speed are 0.008mL/min; The injection amount and the second predetermined injection amount are 1.0 PV.
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