An apparatus for making a chemical sand consolidation system consolidation body and method of use

Abstract

The application discloses a device for making a chemical sand consolidation system consolidation body and a use method thereof, and the device comprises a fixing part, a pressurizing part, a sand filling part and a temperature and pressure control part; the device can be repeatedly used for many times, and the chemical sand consolidation system consolidation experiment simulation repetition rate is high; the device can solve the problem of the traditional glass tube sand filling method or sand mixing method that many factors influence the consolidation process, and the consolidation experiment simulation repeatability is poor; the consolidation process (sand filling, pressurizing, wetting, cementing and solidifying) of the device is continuous and uninterrupted, and the actual situation on site can be simulated; the device can solve the problem of the traditional glass tube sand filling method or sand mixing method that the consolidation process (sand filling, pressurizing, wetting, cementing and solidifying) is interrupted and discontinuous, and the actual situation on site cannot be simulated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil exploitation, and particularly relates to a device for making a chemical sand consolidation system consolidation body and a use method. BACKGROUND

[0002] Bohai loose sandstone heavy oil reservoirs are shallowly buried, poorly compacted, and have loose reservoir cementation. During the development of such oilfields, sand removal of oil wells is serious, and water flooding is prone to cause sand migration in the formation pore throat, resulting in formation plugging and affecting the formation permeability. Therefore, in view of the serious sand production problem of Bohai loose sandstone heavy oil reservoirs, it is urgent to study the chemical sand control and consolidation technology for such oilfields. The chemical sand control and consolidation technology mainly injects a chemical sand consolidation system into the reservoir or pore throat where sand particles migrate, and consolidates the sand particles in a free state under the conditions of formation temperature and pressure, thereby preventing sand production. After the chemical sand control and consolidation technology is constructed, there is no residue in the wellbore, it has wide adaptability, and the process is simple, which has important universality and application value in the development of oilfields.

[0003] At present, there are few devices and experimental methods for laboratory experimental research on chemical sand control and consolidation. Generally, a glass tube sand filling method or a sand mixing method is used to make a consolidation body. However, this method cannot simulate the consolidation process of the chemical sand control and consolidation system under the conditions of formation temperature, cannot simulate the consolidation process of the chemical sand control and consolidation system under the conditions of formation pressure, cannot simulate the formation overburden pressure, and has low similarity between the model consolidation process and the actual formation deposition process. The glass tube sand filling method or the sand mixing method has many influencing factors in the consolidation process, resulting in poor repeatability of the consolidation experiment simulation. The sand filling, pressurizing, wetting, cementing, and solidification in the consolidation process of the glass tube sand filling method or the sand mixing method are interrupted and discontinuous, and cannot simulate the actual situation on site.

[0004] In view of the current technical situation, a device for making a chemical sand consolidation system consolidation body and a use method are invented, which solve the above problems. The device can simulate the consolidation process of the chemical sand control and consolidation system under the conditions of formation pressure, simulate the consolidation process of the chemical sand control and consolidation system under the conditions of formation temperature, simulate the formation overburden pressure, has high similarity between the model consolidation process and the actual formation deposition process, can be repeatedly used for many times, has high repeatability of the chemical sand control and consolidation system consolidation experiment simulation, and has continuous sand filling, pressurizing, wetting, cementing, and solidification in the consolidation process of the device for making a chemical sand consolidation system consolidation body, without interruption, and can simulate the actual situation on site.

[0005] In view of the current technical situation, a device for making chemical sand consolidation system consolidation body and a use method are invented, which can simulate the chemical sand consolidation system consolidation process under the formation temperature and pressure conditions, the simulation experiment has high repeatability, is similar to the actual formation core deposition process, the consolidation process is continuous and uninterrupted, the actual situation can be simulated, and the development of Bohai loose sandstone heavy oil reservoir has important guiding significance. SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the prior art, and provide a device for making chemical sand consolidation system consolidation body and a use method.

[0007] The present application is realized by the following technical solutions:

[0008] A device for making chemical sand consolidation system consolidation body, comprising a fixed part, a booster part, a sand filling part and a temperature and pressure control part;

[0009] The fixed part is composed of a left support, a right support, an upper support and a lower support, the left support and the right support are installed on the lower support, and the upper support is installed on the left support and the right support;

[0010] The booster part is composed of a booster cylinder, a piston and an upper plug, the booster cylinder is fixed below the upper support, the upper end of the booster cylinder is provided with a booster interface, the piston is arranged in the booster cylinder, the lower end of the piston is connected with the upper plug, the upper plug is led out from the lower end of the booster cylinder, and a system injection channel is formed in the upper plug;

[0011] The sand filling part is composed of an upper partition plate, a sealing sleeve, a sand filling model cylinder, a lower partition plate, a lower plug and a model base, the model base is arranged above the lower support, a heating sleeve, the sand filling model cylinder and the sealing sleeve are sequentially arranged from outside to inside on the model base, the upper partition plate and the lower partition plate are arranged in the sealing sleeve, the quartz sand is filled between the upper partition plate and the lower partition plate, the upper end of the upper partition plate is connected with the upper plug, the lower end of the lower partition plate is connected with the lower plug, the lower plug is connected and fixed with the model base, and a drainage channel is formed in the lower plug;

[0012] The temperature and pressure control part is composed of a temperature control module, a pressure gauge, a pipeline and a heating sleeve, the temperature control module is connected with the heating sleeve through the pipeline, the temperature of the heating sleeve is set and monitored in real time, and the pressure gauge is arranged at the booster interface.

[0013] In the above technical solution, the upper support is connected and fixed with the booster cylinder through the first screw and the second screw.

[0014] In the above technical solution, the lower plug and the model base are connected and fixed through the third screw and the fourth screw.

[0015] In the technical scheme, the sand filling model cylinder comprises a sand filling model left cylinder and a sand filling model right cylinder, and the sand filling model left cylinder and the sand filling model right cylinder are connected and fixed through the fifth screw and the sixth screw.

[0016] In the technical scheme, the device can simulate different formation temperatures, pressures and overburden pressures to produce the consolidation body of the chemical sand control system, has high repeatability of simulation experiments, has continuous consolidation process without interruption, can simulate actual field conditions, and has important guiding significance for development of Bohai loose sandstone heavy oil reservoirs.

[0017] A use method of a device for producing a consolidation body of a chemical sand control system, comprising the following steps:

[0018] Step one: the sand filling cylinder left half cylinder and the sand filling cylinder right half cylinder are fixed through the fifth screw and the sixth screw, the sealing sleeve is placed in the sand filling model cylinder, the sand filling model cylinder is fixed with the lower plug and the base through the third screw and the fourth screw, and the lower support is placed at the center position;

[0019] Step two: the heating sleeve is installed outside the sand filling model cylinder, the heating sleeve is connected with the temperature and pressure control module through the pipeline, the lower partition plate is placed in the sand filling model cylinder, then the quartz sand is filled, and finally the upper partition plate is placed;

[0020] Step three: the pressurizing cylinder is fixed with the upper support through the first screw and the second screw, the pressurizing interface, the system injection channel and the pressure gauge are installed, the upper plug is embedded in the sand filling model cylinder and in contact with the upper partition plate;

[0021] Step four: the reservoir temperature and the formation overburden pressure are set through the temperature and pressure control module, the pressurizing interface is controlled to inject distilled water to realize pressurization of the quartz sand, and the heating sleeve is controlled to realize heating of the quartz sand;

[0022] Step five: the system injection channel is used to inject the formation simulation water until the injection pressure is stable, so that the quartz sand is wetted; the sand control system is injected through the system injection channel until the injection pressure is stable, the system injection channel and the drainage channel are closed, and the constant temperature consolidation is performed for 48 hours;

[0023] Step six: after the consolidation is completed, the temperature of the quartz sand is lowered to room temperature through the temperature and pressure control module, so that the quartz sand is depressurized, then the upper plug, the heating sleeve, the third screw, the fourth screw, the lower plug, the model base, the fifth screw, the sixth screw, the sand filling model left cylinder and the sand filling model right cylinder are removed in sequence, and the cemented consolidation body is taken out.

[0024] Compared with the prior art, the device has the following advantages:

[0025] 1. A device and method for making a chemical sand consolidation system consolidation body, which can simulate the chemical sand control sand consolidation process under formation pressure conditions; can solve the problem that the traditional sand consolidation method cannot simulate the chemical sand control sand consolidation process under formation pressure conditions;

[0026] 2. A device and method for making a chemical sand consolidation system consolidation body, which can simulate the chemical sand control sand consolidation process under formation temperature conditions; can solve the problem that the traditional sand consolidation method cannot simulate the chemical sand control sand consolidation process under formation temperature conditions;

[0027] 3. A device and method for making a chemical sand consolidation system consolidation body, which can simulate the formation overburden pressure, and the model consolidation process is similar to the actual formation deposition process; can solve the problem that the traditional sand consolidation method cannot simulate the formation overburden pressure, resulting in low similarity between the model consolidation process and the actual formation deposition process;

[0028] 4. A device and method for making a chemical sand consolidation system consolidation body, which can be repeatedly used in the model, and the chemical sand control sand consolidation experiment simulation repetition rate is high; can solve the problem that the traditional glass tube sand filling method or sand mixing method has many factors affecting the consolidation process, resulting in poor repeatability of the consolidation experiment simulation;

[0029] 5. A device and method for making a chemical sand consolidation system consolidation body, which is a device for making a chemical sand consolidation system consolidation body, and the consolidation process (sand filling, pressurization, wetting, cementation, and solidification) is continuous and uninterrupted, which can simulate the actual situation on site; can solve the problem that the traditional glass tube sand filling method or sand mixing method has interruptions in the consolidation process (sand filling, pressurization, wetting, cementation, and solidification), which is discontinuous and cannot simulate the actual situation on site. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural diagram of the consolidation device.

[0031] Figure 2 It is a sectional view of the sand filling cylinder of the sand filling device.

[0032] Wherein: 1 is a temperature control module, 2 is a left support, 3 is an upper support, 4 is a right support, 5 is a lower support, 6 is a first screw, 7 is a second screw, 8 is a pressure increasing interface, 9 is a piston, 10 is a pressure increasing cylinder, 11 is an upper plug, 12 is a system injection channel, 13 is an upper partition, 14 is a sealing sleeve, 15 is a sand filling model cylinder, 16 is a lower partition, 17 is a third screw, 18 is a fourth screw, 19 is a lower plug, 20 is a liquid discharge channel, 21 is a model base, 22 is a fifth screw, 23 is a sixth screw, 24 is a sand filling model left cylinder, 25 is a sand filling model right cylinder, 26 is a pressure gauge, and 27 is quartz sand.

[0033] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation

[0034] The technical solution of the present invention will be further described below with reference to specific embodiments.

[0035] Example

[0036] An apparatus for producing solidified bodies in a chemical sand fixation system, the apparatus comprising a pressurization section, a sand filling section, a temperature and pressure control section, and a fixing section;

[0037] The pressurization section consists of a pressurization cylinder 10, a piston 9, and an upper plug 11. The piston 9 is sealed to the pressurization cylinder 10 and the pressurization cylinder 10 is sealed to the upper plug 11. The piston 9 and the upper plug 11 are connected by threads.

[0038] The sand-filling section consists of a system injection channel 12, an upper partition 13, a sealing sleeve 14, a sand-filling model cylinder 15, a lower partition 16, a third screw 17, a fourth screw 18, a lower plug 19, a drainage channel 20, a model base 21, a fifth screw 22, a sixth screw 23, a left sand-filling model cylinder 24, a right sand-filling model cylinder 25, and quartz sand 27. The system injection channel 12 is connected to the upper partition 13, the lower partition 16 is connected to the drainage channel 20, and the sealing sleeve 14 is sealed to the upper plug 11 and the lower plug 19. The upper plug 11 and the lower plug... 19 and the sealing sleeve 14 form a sand-filling space for quartz sand 27, and upper partition 13 and lower partition 16 are respectively placed between the upper plug 11 and the lower plug 19 and the quartz sand 27 to protect the bonding effect of the quartz sand 27; the sealing sleeve 14, the sand-filling model cylinder 15, and the heating sleeve 29 are connected in sequence; the lower plug 19 and the model base 21 are fixed by the third screw 17 and the fourth screw 18; the sand-filling model cylinder 15 is fixed by the fifth screw 22 and the sixth screw 23 to the left cylinder 24 and the right cylinder 25 of the sand-filling model; the pressurization part is connected to the sand-filling part through the upper plug 11;

[0039] The temperature and pressure control section consists of a temperature control module 1, a pressure gauge 26, a pipeline 28, and a heating jacket 29. The temperature control module 1 is connected to the heating jacket 29 through the pipeline 28 and can monitor and set the temperature of the heating jacket 29 in real time.

[0040] The fixing part consists of a left support 2, an upper support 3, a right support 4, and a lower support 5. The upper support 3 is fixed to the pressurization part by a first screw 6 and a second screw 7. The device can simulate different formation temperatures, pressures, and overburden conditions to produce solidified quartz sand in a chemical sand control system. The simulation experiment has high repeatability, and the consolidation process is continuous and uninterrupted. It can simulate the actual situation on site and has important guiding significance for the development of loose sandstone heavy oil reservoirs in the Bohai Sea.

[0041] The method for simulating the consolidation of a sand control chemical system in a formation comprises the following steps:

[0042] Step one: Fix the left sand pack model cylinder 24 and the right sand pack model cylinder 25 through the fifth screw 22 and the sixth screw 23, and place the sealing sleeve 14 inside the sand pack model cylinder 15; Fix the sand pack model cylinder 15 with the lower plug 19 and the model base 21 through the third screw 17 and the fourth screw 18, and place the lower support 5 at the center position;

[0043] Step two: Install the heating sleeve 29 outside the sand pack model cylinder 15, and connect the pipeline 28 with the temperature control module 1; Place the lower baffle 16 in the sand pack model cylinder 15, then fill in the quartz sand 27, and finally place the upper baffle 13;

[0044] Step three: Fix the pressure boosting cylinder 10 with the upper support 3 through the first screw 6 and the second screw 7, and install the pressure boosting interface 8, the system injection channel 12, and the pressure gauge 26; Embed the upper plug 11 into the sand pack model cylinder 15, and make it contact with the upper baffle 13;

[0045] Step four: Set the reservoir temperature and the formation overburden pressure through the temperature control module 1, control the injection amount of distilled water through the pressure boosting interface 8 to boost the pressure of the quartz sand 27, and control the heating sleeve 29 to heat the quartz sand 27;

[0046] Step five: Inject the formation simulation water through the system injection channel 12 until the injection pressure is stable, so as to wet the quartz sand 27; Inject the sand control system through the system injection channel 12 until the injection pressure is stable, close the system injection channel 12 and the drainage channel 20, and keep constant temperature consolidation for 48 hours;

[0047] Step six: After the consolidation is completed, reduce the temperature of the quartz sand 27 to room temperature through the temperature control module 1, so as to release the pressure of the quartz sand 27, then sequentially remove the upper plug 11, the heating sleeve 29, the third screw 17, the fourth screw 18, the lower plug 19, the base 21, the fifth screw 22, the sixth screw 23, the left sand pack model cylinder 24, and the right sand pack model cylinder 25, and take out the consolidated body.

[0048] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In the present application, unless otherwise explicitly specified and limited, the "on" or "under" of the first feature to the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the "over", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0050] The above is an exemplary description of the present application, and it should be noted that any simple modification, modification or other equivalent replacement that does not deviate from the core of the present application and does not require creative labor of those skilled in the art falls within the protection scope of the present application.

Claims

1. An apparatus for making a chemical sand consolidation system consolidated body, characterized by: It comprises a fixing part, a pressurizing part, a sand filling part and a temperature and pressure control part. The fixing part is composed of a left support, a right support, an upper support and a lower support, the left support and the right support are installed on the lower support, and the upper support is installed on the left support and the right support. The pressurizing part is composed of a pressurizing cylinder, a piston and an upper plug, the pressurizing cylinder is fixed below the upper support, the upper end of the pressurizing cylinder is provided with a pressurizing interface, the pressurizing cylinder is provided with the piston inside, the lower end of the piston is connected with the upper plug, the upper plug is embedded in the pressurizing cylinder, and the upper plug is provided with a system injection channel. The sand filling part is composed of an upper partition plate, a sealing sleeve, a sand filling model cylinder, a lower partition plate, a lower plug and a model base, the model base is arranged above the lower support, the model base is sequentially provided with a heating sleeve, the sand filling model cylinder and the sealing sleeve from outside to inside, the sealing sleeve is provided with the upper partition plate and the lower partition plate, the upper partition plate and the lower partition plate are filled with quartz sand, the upper end of the upper partition plate is connected with the upper plug, the lower end of the lower partition plate is connected with the lower plug, the lower plug is fixedly connected with the model base, and the lower plug is provided with a drainage channel. The temperature and pressure control part is composed of a temperature control module, a pressure gauge, a pipeline and a heating sleeve, the temperature control module is connected with the heating sleeve through the pipeline, the temperature of the heating sleeve is set and monitored in real time, and the pressure gauge is arranged at the pressurizing interface. The upper support is fixedly connected with the pressurizing cylinder through first and second screws, the lower plug and the model base are fixedly connected through third and fourth screws, and the sand filling model cylinder comprises a sand filling model left cylinder and a sand filling model right cylinder which are fixedly connected through fifth and sixth screws.

2. A method of using the apparatus for making a chemical sand consolidation system consolidation body as claimed in claim 1, characterized in that: It comprises the following steps: In step one, the sand filling cylinder left half and the sand filling cylinder right half are fixed through the fifth and sixth screws, the sand filling model cylinder is placed inside the sealing sleeve, and the sand filling model cylinder and the lower plug and the base are fixed through the third and fourth screws and placed at the center of the lower support; In step two, the heating sleeve is installed outside the sand filling model cylinder, the heating sleeve is connected with the temperature and pressure control module through the pipeline, the lower partition plate is placed in the sand filling model cylinder, then the quartz sand is filled, and finally the upper partition plate is placed; In step three, the pressurizing cylinder is fixed with the upper support through the first and second screws, the pressurizing interface, the system injection channel and the pressure gauge are installed, the upper plug is embedded in the sand filling model cylinder and contacts with the upper partition plate; In step four, the temperature and pressure control module is used to set the reservoir temperature and the formation overburden pressure, the injection amount of distilled water at the pressurizing interface is controlled to realize the pressurization of the quartz sand, and the heating sleeve is controlled to realize the heating of the quartz sand; In step five, the formation simulation water is injected through the system injection channel until the injection pressure is stable, and the wetting of the quartz sand is realized; The sand prevention system is injected through the system injection channel until the injection pressure is stable, the system injection channel and the drainage channel are closed, and the constant temperature consolidation is performed for 48 hours; In step six, after the consolidation is completed, the temperature of the quartz sand is reduced to room temperature through the temperature and pressure control module, the pressure relief of the quartz sand is realized, then the upper plug, the heating sleeve, the third and fourth screws, the lower plug, the model base, the fifth and sixth screws, the sand filling model left cylinder and the sand filling model right cylinder are removed in sequence, and the consolidated body after cementation is taken out.

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