CN111535785A - A simulation test bench and test method for pulverized coal plugging a horizontal wellbore of coalbed methane - Google Patents
A simulation test bench and test method for pulverized coal plugging a horizontal wellbore of coalbed methaneDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及煤层气开采技术领域，尤其涉及一种煤粉堵塞煤层气水平井筒的模拟试验台和试验方法。The invention relates to the technical field of coalbed methane exploitation, in particular to a simulation test bench and a test method for pulverized coal to block a horizontal wellbore of coalbed methane.
背景技术Background technique
当前，煤层气的生产通常采用地面井抽采的方式，通过在地面垂向布置井筒至煤层中，在储层压力作用下，煤层气解吸、扩散，并最终渗流汇集至井筒中。水平井开采的设计方法，使得煤层气井与煤层具有更大的接触面积，显著提升煤层气的单井产量。At present, the production of coalbed methane usually adopts the method of surface well extraction. By vertically arranging the wellbore on the ground to the coal seam, under the action of the reservoir pressure, the coalbed methane is desorbed and diffused, and finally seepage flow is collected into the wellbore. The design method of horizontal well mining enables the CBM well to have a larger contact area with the coal seam, which significantly increases the single well production of CBM.
煤储层作为低渗透率储层，内部气体的天然渗流能力较差，通常需要进行水力压裂的方式来进行增产。在井筒布置完成和进行水力压裂之后，则正式进入了煤层气的排采阶段。值得注意的是，煤层弹性模量低，存在易碎的特性，煤储层内部含有大量煤粉，同时，煤层通常是富水储层。因此，在压裂液返排、排采的阶段，煤粉和水很容易混合在一起，形成粘稠的煤浆并在储层压力驱使下进入井筒，常会引发井筒堵塞而导致产量下降，而在煤层中含有的煤层气(主要成分为甲烷)的混合作用下，使得煤粉堵塞煤层气井筒的作用机理更加复杂。Coal reservoirs, as low permeability reservoirs, have poor natural seepage ability of internal gas, and usually require hydraulic fracturing to stimulate production. After the wellbore layout is completed and hydraulic fracturing is performed, the coalbed methane drainage and production stage is officially entered. It is worth noting that the coal seam has a low elastic modulus and is fragile, and the coal seam contains a large amount of coal powder. At the same time, the coal seam is usually a water-rich reservoir. Therefore, in the stage of fracturing fluid flowback and drainage, pulverized coal and water are easily mixed together to form a viscous coal slurry and enter the wellbore under the drive of reservoir pressure, which often leads to wellbore blockage and production decline. Under the mixing action of the coalbed methane (the main component is methane) contained in the coal seam, the action mechanism of coal powder plugging the coalbed methane wellbore is more complicated.
长期以来，对于煤粉堵塞井筒的研究通常采用现场产量分析推测，或者是理论分析、数值模拟的方法，并以此为基础，研发井筒解堵技术。然而，无法直观的观测井筒堵塞特征，使得对于煤粉堵塞井筒的研究无法进一步深入，这在一定程度上也限制了煤层气井筒的解堵技术的发展。For a long time, the research on the wellbore plugged by pulverized coal usually adopts on-site production analysis and speculation, or the method of theoretical analysis and numerical simulation, and based on this, the wellbore plugging removal technology is developed. However, it is impossible to observe the characteristics of wellbore plugging intuitively, which makes it impossible to further study the wellbore plugged by pulverized coal.
基于此，本发明致力于研发一种煤粉堵塞煤层气水平井筒的模拟试验方法，解决现有试验方法存在的局限性问题，为排采过程中煤粉堵塞水平井筒段的作用机理提供科学有效的研究手段。Based on this, the present invention is devoted to developing a simulation test method for pulverized coal to block the horizontal wellbore of coalbed methane, to solve the limitations of the existing test methods, and to provide a scientific and effective mechanism for the action mechanism of pulverized coal to block the horizontal wellbore section during the drainage and production process. research methods.
发明内容SUMMARY OF THE INVENTION
为解决无法直观观测井筒堵塞的技术问题，本发明公开了一种煤粉堵塞煤层气水平井筒的模拟试验台和试验方法，为排采过程中煤粉堵塞水平井筒段的作用机理提供科学有效的研究手段。In order to solve the technical problem that the wellbore blockage cannot be observed intuitively, the present invention discloses a simulation test bench and a test method for pulverized coal to block a horizontal wellbore of coalbed methane, which provides a scientific and effective mechanism for the action mechanism of pulverized coal blocking the horizontal wellbore section during the drainage and production process. research tools.
为实现上述目的，本发明采用下述技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种煤粉堵塞煤层气水平井筒的模拟试验台，包括模拟煤层气开采时的水平段井筒的模拟水平井筒、混匀煤浆与甲烷的储液箱，所述模拟水平井筒的左端与出液管相连接，右端与进液管的一端相连接，进液管的另一端与储液箱的出液口相连接，储液箱的进液口通过高压管线与注气泵的出气口相连接，注气泵的进气口与甲烷气瓶相连。A simulation test bench for pulverized coal plugging a horizontal wellbore of coalbed methane, comprising a simulated horizontal wellbore for simulating the horizontal section of the wellbore during coalbed methane exploitation, a liquid storage tank for mixing coal slurry and methane, the left end of the simulated horizontal wellbore and the liquid outlet The pipes are connected, the right end is connected with one end of the liquid inlet pipe, the other end of the liquid inlet pipe is connected with the liquid outlet of the liquid storage tank, and the liquid inlet of the liquid storage tank is connected with the gas outlet of the gas injection pump through the high-pressure pipeline. The air inlet of the gas injection pump is connected to the methane gas cylinder.
作为本发明的进一步优选，所述储液箱的顶部设有向储液箱内装填煤粉和水的加料口，加料口处还装有密封用的顶盖；储液箱的内部还设置有对箱内流体的温度进行调节的温控装置，对箱内流体进行搅拌的搅拌器，以及监测箱内流体温度的温度传感器；储液箱的顶部安装有显示储液箱内压力的压力表。As a further preference of the present invention, the top of the liquid storage tank is provided with a feeding port for filling the liquid storage tank with pulverized coal and water, and the feeding port is also provided with a sealing top cover; the interior of the liquid storage tank is also provided with A temperature control device for adjusting the temperature of the fluid in the tank, a stirrer for stirring the fluid in the tank, and a temperature sensor for monitoring the temperature of the fluid in the tank; a pressure gauge is installed on the top of the liquid storage tank to display the pressure in the liquid storage tank.
作为本发明的进一步优选，所述模拟水平井筒的正下方设置多台高速摄像机，高速摄像机沿模拟水平井筒横向布设，用于观测模拟水平井筒内流体的流动形态；所述模拟水平井筒设计为圆筒形结构，采用高强度透明钢化玻璃材质制成。As a further preference of the present invention, a plurality of high-speed cameras are arranged directly under the simulated horizontal wellbore, and the high-speed cameras are arranged laterally along the simulated horizontal wellbore to observe the flow pattern of the fluid in the simulated horizontal wellbore; the simulated horizontal wellbore is designed as a circle The cylindrical structure is made of high-strength transparent tempered glass.
作为本发明的进一步优选，在出液管上设置流量计、电控出液稳压阀和出液压力传感器；在所述进液管上设置进液压力传感器和电控进液稳压阀。As a further preference of the present invention, a flow meter, an electronically controlled liquid outlet pressure-stabilizing valve and a liquid outlet pressure sensor are arranged on the liquid outlet pipe;
作为本发明的进一步优选，通过计算机实现对电控出液稳压阀、电控进液稳压阀、温控装置、搅拌器、注气泵的自动控制，并接收流量计、出液压力传感器、温度传感器和进液压力传感器传送来的监测数据，高速摄像机将实时监测到的模拟水平井筒中的混合流动形态传送至计算机。As a further preference of the present invention, the computer realizes the automatic control of the electronically controlled liquid outlet pressure-stabilizing valve, the electronically controlled liquid inlet pressure-stabilizing valve, the temperature control device, the agitator, and the air injection pump, and receives the flowmeter, the liquid outlet pressure sensor, The monitoring data sent by the temperature sensor and the liquid feed pressure sensor, the high-speed camera transmits the real-time monitoring of the mixed flow pattern in the simulated horizontal wellbore to the computer.
本发明的另一个目的在于，公开了一种煤粉堵塞煤层气水平井筒的模拟试验方法，采用上述的模拟试验台，包括以下步骤：Another object of the present invention is to disclose a simulation test method for pulverized coal plugging a horizontal wellbore of coalbed methane, using the above simulation test bench, including the following steps:
(1)监测井底压力、温度；(1) Monitoring bottom hole pressure and temperature;
(2)绘制参数变化曲线并编制控制程序；(2) Draw the parameter change curve and compile the control program;
(3)搭建模拟试验台；(3) Build a simulation test bench;
(4)模拟煤粉堵塞煤层气水平井筒过程。(4) Simulate the process of pulverized coal plugging the horizontal wellbore of CBM.
作为本发明的进一步优选，步骤(1)中，首先布置煤层气井筒，在进行水力压裂前，通过电缆将温压传感器沿井筒垂向井段送入井底，进行煤层水力压裂时，启动温压传感器开始监测井底水平段的压力、温度参数，并将数据通过电缆传输至位于地面的数据采集仪。As a further preference of the present invention, in step (1), the coalbed methane wellbore is firstly arranged, and before hydraulic fracturing, the temperature and pressure sensor is sent to the bottom of the well along the vertical wellbore through the cable, and when the coalbed hydraulic fracturing is performed, start the The temperature and pressure sensor begins to monitor the pressure and temperature parameters of the horizontal section of the bottom hole, and transmits the data to the data acquisition instrument located on the surface through the cable.
作为本发明的进一步优选，步骤(2)中，将数据采集仪中监测到的温度、压力数据导入计算机，选取自压裂液返排开始的监测数据，利用origin软件进行数据拟合，绘制得到温度和井底压力随时间变化的曲线，采用计算机编程方法，将温度和井底压力随时间变化的曲线编制成为伺服控制程序。As a further preference of the present invention, in step (2), the temperature and pressure data monitored in the data acquisition instrument are imported into the computer, the monitoring data since the fracturing fluid flowback is selected, and the origin software is used to perform data fitting and draw The curve of temperature and bottom-hole pressure changing with time is obtained. Using computer programming method, the curve of temperature and bottom-hole pressure changing with time is compiled into a servo control program.
作为本发明的进一步优选，步骤(4)具体包括：As a further preference of the present invention, step (4) specifically includes:
(1)将煤粉、水按照一定的质量比，通过加料口加入储液箱内，旋紧加料口处顶盖保持储液箱处于关闭状态，开启注气泵向储液箱中注入甲烷气体，至箱内压力达到6-8MPa开启搅拌器持续搅拌，将煤浆与甲烷混合均匀；(1) Add pulverized coal and water into the liquid storage tank through the feeding port according to a certain mass ratio, tighten the top cover at the feeding port to keep the liquid storage tank closed, and turn on the gas injection pump to inject methane gas into the liquid storage tank. When the pressure in the box reaches 6-8MPa, turn on the agitator and continue stirring, and mix the coal slurry and methane evenly;
(2)温度传感器将实时监测到的储液箱内流体温度数据传输至计算机，按照已编制的伺服控制程序中的温度变化设置，通过计算机控制温控装置对储液箱内流体进行温度调节，使其按照井底温度监测数据随时间变化；(2) The temperature sensor transmits the temperature data of the fluid in the liquid storage tank monitored in real time to the computer, and adjusts the temperature of the fluid in the liquid storage tank through the computer-controlled temperature control device according to the temperature change settings in the prepared servo control program. Make it change with time according to the bottom hole temperature monitoring data;
(3)进液压力传感器将进液管内部压力监测数据传输反馈至计算机，通过计算机控制缓慢调节电控进液稳压阀，实现对进液压力的控制，将进液管内流体压力保持在煤储层压力水平；(3) The liquid inlet pressure sensor transmits and feeds back the monitoring data of the internal pressure of the liquid inlet pipe to the computer, and slowly adjusts the electronically controlled liquid inlet pressure-stabilizing valve through computer control to realize the control of the liquid inlet pressure, and maintain the fluid pressure in the liquid inlet pipe at the coal level. reservoir pressure level;
(4)出液压力传感器将出液管内部压力监测数据传输反馈至计算机，通过计算机控制缓慢调节电控出液稳压阀，实现对出液压力的控制，按照伺服程序中的井底压力变化设置，通过计算机控制电控出液稳压阀的开度，调节出液管内部压力，使其按照井底压力监测数据随时间变化；(4) The liquid outlet pressure sensor transmits and feeds back the monitoring data of the internal pressure of the liquid outlet pipe to the computer, and slowly adjusts the electronically controlled liquid outlet pressure-stabilizing valve through the computer control to realize the control of the liquid outlet pressure. According to the bottom hole pressure change in the servo program Setting, through the computer control the opening of the liquid outlet regulator valve, adjust the internal pressure of the liquid outlet pipe, so that it changes with time according to the bottom hole pressure monitoring data;
(5)流量计实时监测出液管处的出液量，并将监测数据传输至计算机，高速摄像机实时监测模拟水平井筒中的甲烷气泡、煤浆的混合流动形态，并将视频数据传输至计算机。(5) The flow meter monitors the liquid output at the liquid outlet pipe in real time, and transmits the monitoring data to the computer. The high-speed camera monitors the mixed flow pattern of methane bubbles and coal slurry in the simulated horizontal wellbore in real time, and transmits the video data to the computer. .
本发明的有益效果是，基于煤层气开采现场监测的井底压力和温度数据，根据数据变化特征编制伺服控制程序，搭建物理模拟试验台，进行煤粉堵塞井筒的模拟测试，可以有效模拟煤层中的煤粉、地层水、甲烷气体三相混合作用下，对井筒的堵塞过程。The beneficial effect of the invention is that, based on the bottom hole pressure and temperature data monitored on the coalbed methane mining site, the servo control program is compiled according to the data change characteristics, the physical simulation test bench is built, and the simulation test of coal powder plugging the wellbore can be effectively simulated in the coal seam. The plugging process of the wellbore under the three-phase mixing of coal powder, formation water and methane gas.
本发明提供了可行的实验室研究手段，基于现场观测的井底压力、温度数据，可以真实反映井筒堵塞的实际特征，并可以直观地观测模拟水平井筒内的煤粉运移和堵塞特征，分析煤粉堵塞水平井筒的发生条件。通过本发明提出的方法进行物理模拟试验，可以为研究煤层气井筒防堵技术提供科学的理论依据。The invention provides a feasible laboratory research method. Based on the bottom hole pressure and temperature data observed on site, the actual characteristics of wellbore plugging can be truly reflected, and the characteristics of coal powder migration and plugging in the simulated horizontal wellbore can be visually observed and analyzed. Occurrence conditions of pulverized coal plugging horizontal wellbore. The physical simulation test carried out by the method proposed in the present invention can provide a scientific theoretical basis for the study of the coalbed methane wellbore anti-blocking technology.
附图说明Description of drawings
图1为本发明实施例1结构示意图；1 is a schematic structural diagram of Embodiment 1 of the present invention;
图2为本发明实施例2中的温压传感器安装示意图；2 is a schematic diagram of the installation of a temperature and pressure sensor in
附图标记说明：Description of reference numbers:
1、电缆；2、温压传感器；3、井筒；4、数据采集仪；5、出液管；6、流量计；7、电控出液稳压阀；8、出液压力传感器；9、模拟水平井筒；10、高速摄像机；11、进液压力传感器；12、进液管；13、电控进液稳压阀；14、储液箱；15、加料口；16、温控装置；17、搅拌器；18、温度传感器；19、压力表；20、注气泵；21、甲烷气瓶；22、计算机；1. Cable; 2. Temperature and pressure sensor; 3. Wellbore; 4. Data acquisition instrument; 5. Liquid outlet pipe; 6. Flow meter; 7. Electronically controlled liquid outlet pressure regulator; 8. Liquid outlet pressure sensor; 9. Simulated horizontal wellbore; 10, high-speed camera; 11, liquid inlet pressure sensor; 12, liquid inlet pipe; 13, electronically controlled liquid inlet regulator valve; 14, liquid storage tank; 15, feeding port; 16, temperature control device; 17 , stirrer; 18, temperature sensor; 19, pressure gauge; 20, gas injection pump; 21, methane gas cylinder; 22, computer;
具体实施方式Detailed ways
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.
实施例1Example 1
如图1所示，一种煤粉堵塞煤层气水平井筒的模拟试验台，包括模拟煤层气开采时的水平段井筒3的模拟水平井筒9、混匀煤浆与甲烷的储液箱14，上述模拟水平井筒9的左端与出液管5相连接，右端与进液管12的一端相连接，进液管12的另一端与储液箱14的出液口相连接，进液管12将储液箱14与模拟水平井筒9相连接，储液箱14的进液口通过高压管线与注气泵20的出气口相连接，注气泵20的进气口与甲烷气瓶21相连，甲烷气瓶21中的甲烷气体通过注气泵20注入到储液箱14中。As shown in FIG. 1 , a simulation test bench for pulverized coal plugging a horizontal wellbore of coalbed methane includes a simulated horizontal wellbore 9 for simulating the
特别的，上述储液箱14的顶部设有向储液箱14内装填煤粉和水的加料口15，加料口15处还装有密封用的顶盖；储液箱14的内部还设置有对箱内流体的温度进行调节的温控装置16，对箱内流体进行搅拌的搅拌器17，以及监测箱内流体温度的温度传感器18；储液箱14的顶部安装有显示储液箱14内压力的压力表19。In particular, the top of the
特别的，上述模拟水平井筒9的正下方设置三台高速摄像机10，高速摄像机10沿模拟水平井筒9横向布设，用于观测模拟水平井筒9内流体的流动形态；上述模拟水平井筒9设计为圆筒形结构，采用高强度透明钢化玻璃材质制成，便于直观地观察内部流体流动形态。In particular, three high-speed cameras 10 are arranged directly under the above-mentioned simulated horizontal wellbore 9, and the high-speed cameras 10 are arranged laterally along the simulated horizontal wellbore 9 to observe the flow pattern of the fluid in the simulated horizontal wellbore 9; the above-mentioned simulated horizontal wellbore 9 is designed as a circle The cylindrical structure is made of high-strength transparent tempered glass, which is easy to observe the internal fluid flow pattern intuitively.
特别的，在出液管5上设置流量计6、电控出液稳压阀7和出液压力传感器8，流量计6将出液管5上的流量数据传送给计算机22，电控出液稳压阀7用于控制出液管5上流体稳定流动，出液压力传感器8监测出液管5上的流体压力；在上述进液管12上设置进液压力传感器11和电控进液稳压阀3，进液压力传感器11监测进液管12上的液体压力，电控进液稳压阀3控制进液管12上的流体稳定流动。In particular, a flow meter 6, an electronically controlled liquid outlet pressure-stabilizing valve 7 and a liquid
特别的，通过计算机22实现对电控出液稳压阀7、电控进液稳压阀3、温控装置16、搅拌器17、注气泵20的自动控制，并接收流量计6、出液压力传感器8、温度传感器18和进液压力传感器11传送来的监测数据，高速摄像机10将实时监测到的模拟水平井筒9中的混合流动形态传送至计算机22，自动化程度高，监控准确度高。In particular, the
实施例2Example 2
本发明还公开了一种煤粉堵塞煤层气水平井筒的模拟试验方法，采用实施例1公开的模拟试验台，具体包括以下步骤：The invention also discloses a simulation test method for pulverized coal plugging a horizontal wellbore of coalbed methane, using the simulation test bench disclosed in Embodiment 1, which specifically includes the following steps:
步骤一、监测井底压力、温度Step 1. Monitor bottom hole pressure and temperature
首先布置煤层气井筒3，在进行水力压裂前，通过电缆1将温压传感器2沿井筒3垂向井段送入井底，开始进行煤层水力压裂，启动温压传感器2开始监测井底水平段的压力、温度参数，并将监测到的温度、压力数据通过电缆1传输至位于地面的数据采集仪4。First, the
步骤二、绘制参数变化曲线并编制控制程序
将数据采集仪4中监测到的温度、压力数据导入计算机22，选取自压裂液返排开始的监测数据，利用origin软件进行数据拟合，绘制得到温度和井底压力随时间变化的曲线，采用计算机编程方法，将温度和井底压力随时间变化的曲线编制成为伺服控制程序。Import the temperature and pressure data monitored in the
步骤三、搭建模拟试验台
模拟水平井筒9用于模拟煤层气开采时的水平段井筒3，并按照实施例1所公开的结构形式进行试验台搭建：The simulated horizontal wellbore 9 is used to simulate the
模在模拟水平井筒9的左、右两侧分别安装出液管5、进液管12，出液管5上安装流量计6、电控出液稳压阀7和出液压力传感器8，进液管12上安装进液压力传感器11和电控进液稳压阀3，在模拟水平井筒9的正下方并排地设置三台高速摄像机10，沿模拟水平井筒9横向进行布置，用于观测模拟水平井筒9内部流体的流动形态。The liquid outlet pipe 5 and the
用进液管12将模拟水平井筒9与储液箱14进行连接，储液箱14内底部安装温控装置16、搅拌器17和温度传感器18，其中，温控装置16采用现有技术中成品即可，用于对箱内流体的温度进行调节的目的，搅拌器17用于对箱内流体搅拌达到搅拌均匀的目的，温度传感器18用于监测箱内流体温度。A
按照如图1所示的结构，将试验台组装完成，待用。According to the structure shown in Figure 1, the test bench is assembled and ready for use.
步骤四、模拟煤粉堵塞煤层气水平井筒3过程。Step 4: Simulate the process of pulverized coal blocking the
(41)将煤粉、水按质量比1:5混合，煤粉、水煤共计20Kg，均通过加料口15加入储液箱14内，旋紧加料口15处顶盖，保持储液箱14处于关闭状态，设置煤浆和甲烷的体积比例为9:1，开启注气泵20向储液箱14中注入甲烷气体，至箱内压力达到8MPa，开启搅拌器17持续搅拌，将煤浆与甲烷混合均匀。(41) Mix pulverized coal and water at a mass ratio of 1:5. The total amount of pulverized coal and water-coal is 20Kg, all of which are added to the
(42)温度传感器18将实时监测到的储液箱14内流体温度数据传输至计算机22，按照已编制的伺服控制程序中的温度变化设置，通过计算机22控制温控装置16对储液箱14内流体进行温度调节，使其按照井底温度监测数据随时间变化。(42) The
(43)进液压力传感器11将进液管12内部压力监测数据传输反馈至计算机22，通过计算机22控制缓慢调节电控进液稳压阀3，实现对进液压力的控制，将进液管12内流体压力保持在煤储层压力水平4.5MPa，煤储层压力可从区域内煤层气开采的现场设计资料中获取。(43) The liquid
(44)出液压力传感器8将出液管5内部压力监测数据传输反馈至计算机22，通过计算机22控制缓慢调节电控出液稳压阀7，实现对出液压力的控制，按照伺服程序中的井底压力变化设置，通过计算机22控制电控出液稳压阀7的开度，调节出液管5内部压力，使其按照井底压力监测数据随时间变化。(44) The liquid
(45)流量计6实时监测出液管5处的出液量，并将监测数据传输至计算机22，高速摄像机10实时监测模拟水平井筒9中的甲烷气泡、煤浆的混合流动形态，并将视频数据传输至计算机22。(45) The flow meter 6 monitors the liquid output at the liquid outlet pipe 5 in real time, and transmits the monitoring data to the
由上述步骤所得出的实验结果，再根据实际测得的井底压力和温度变化情况，结合摄像机观测的视频数据，综合分析煤粉对井筒3的堵塞特征与井底压力、温度的内在关系，从而进一步揭示煤粉堵塞井筒3的作用机理，为煤层气解堵技术的研发提供科学参考依据。Based on the experimental results obtained from the above steps, according to the actual measured bottom-hole pressure and temperature changes, combined with the video data observed by the camera, the internal relationship between the clogging characteristics of the
当然，上述说明并非是对本发明的限制，本发明也并不仅限于上述举例，本技术领域的技术人员在本发明的实质范围内所做出的变化、改型、添加或替换，也应属于本发明的保护范围。Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also belong to the present invention. the scope of protection of the invention.
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