Temperature maintaining method of crude oil separation device for oil reservoir type gas storage well site

Abstract

The invention relates to a temperature maintaining method of a crude oil separation device for an oil reservoir type gas storage well site, which comprises the following steps: arranging at least one group of heating coils towards the inside of the crude oil separation device from a seal head on one side of the crude oil separation device, and inserting electric heating rods into the heating coils; a heat-conducting oil expansion tank communicated with the interior of the crude oil separation device is arranged at a sealing head on one side of the crude oil separation device and is used for absorbing volume change caused by heat expansion of heat-conducting oil. Aiming at the current situation that a gas storage well site needs an electric heating plate for temperature maintenance or a heating furnace for heating and temperature maintenance of equipment, a heat-conducting oil expansion tank and an electric heating structure are additionally arranged at an end socket of a conventional crude oil separation device, and the two functional devices are combined into a whole. Compared with electric hot plate temperature maintenance, the method is higher in heat efficiency, more uniform in heating and lower in purchase cost. Compared with heating furnace temperature maintenance, the cost of one wellhead heating furnace is reduced, the occupied area of one wellhead heating furnace pry is reduced, the on-site workload is effectively reduced, and the safety risk is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the field of surface engineering of oil reservoir type gas storage, and in particular relates to a temperature maintenance method of a crude oil separation device used in a well field of an oil reservoir type gas storage. Background Art

[0002] The conventional process flow in the construction of reservoir-type gas storage on the ground at the well site is to set up a gas-liquid two-phase separator at the injection and production well site to perform preliminary gas-liquid separation on the produced gas, and the separated gas is transported to the gas production device of the gas storage collection and injection station through a two-way gas pipeline for dehydration and dehydrocarbon treatment; the separated liquid is transported to the nearby oil production station.

[0003] Since the freezing point of crude oil separated by reservoir-type gas storage separators is generally high, the crude oil separator needs to be temperature maintained. The current conventional practice is to add an electric heating plate at the bottom of the separator for heating and temperature maintenance or to set up a heating furnace at the well site to provide hot water as a heating source.

[0004] The process of using electric heating plates to heat and maintain temperature or setting up a heating furnace at the well site to provide hot water as a heating source has the following problems:

[0005] (1) The electric heating plate needs to conduct heat through the tank wall of the equipment to heat, which results in large heat loss. At the same time, because it is attached to the outer wall of the tank, the temperature of the heated medium at the center of the tank will be lower than that at the tank wall, resulting in uneven heating.

[0006] (2) The electric heating plate has large heat loss and low utilization rate, resulting in the actual power being much greater than the power required for heating. This problem is particularly prominent in high-pressure thick-wall equipment.

[0007] (3) The service life of the electric heating plate is relatively short and needs to be replaced periodically, which requires additional costs and damages the insulation layer.

[0008] (4) Using a heating furnace to provide a heat source will increase the project footprint, increase project investment, increase the workload of on-site operation and management, and increase safety risks.

[0009] There is an urgent need to innovate and upgrade existing ground construction technology and vigorously increase the electrification rate of the well site. Summary of the invention

[0010] In order to overcome the deficiencies in the prior art, the present invention provides a temperature maintenance method for a crude oil separation device for an oil reservoir type gas storage well site, which changes the process in which the gas storage well site needs to independently set up an electric heating plate or a heating furnace to provide a heating heat source, and realizes the temperature maintenance of the crude oil separation device by a simple process with a set of equipment, which can achieve the effects of small volume, saving project floor space, reducing project investment, reducing on-site operation and management workload, uniform heating, small heat loss, and reduced safety risks.

[0011] The technical solution adopted by the present invention to solve the technical problem is:

[0012] A temperature maintenance method for a crude oil separation device used in a well site of an oil reservoir type gas storage reservoir comprises: at least one set of heating coils is arranged from a side end cap of the crude oil separation device to the inside of the crude oil separation device, and an electric heating rod is inserted into the heating coils; a heat transfer oil expansion tank connected to the inside of the crude oil separation device is arranged at a side end cap of the crude oil separation device to absorb the volume change caused by the thermal expansion of the heat transfer oil.

[0013] Compared with the traditional method of adding an electric heating plate to the outer wall of the bottom of the crude oil separation unit for heating and temperature maintenance or using a heating furnace to provide a heat source for heating, this solution has the following improvements and benefits:

[0014] By installing heating coils and electric heating rods at the head of the crude oil separation device, uniform heating of the entire device can be achieved. Compared with the method of only adding electric heating plates on the bottom outer wall, this temperature maintenance method can better maintain the temperature balance inside the device and avoid problems caused by excessive temperature differences.

[0015] Since the heating coil and electric heating rod are located inside the device, the heat transfer is more direct and efficient. Compared with the method of adding electric heating plates on the outer wall, this temperature maintenance method can transfer heat to the crude oil separation device faster, improve heating efficiency and save energy.

[0016] Since the heating coil and electric heating rod are directly inserted into the device, there is no need to add an electric heating plate or an additional heating furnace to the bottom outer wall of the device, which can reduce the demand for floor space. For oil reservoir-type gas storage well sites with limited space, space resources can be better utilized.

[0017] Furthermore, a steel platform is provided at a head of one side of the crude oil separation device, the steel platform is connected to the head of the crude oil separation device through a steel bracket, and the heat transfer oil expansion tank is placed on the steel platform.

[0018] The setting of the steel platform and the steel support can stably support the weight of the thermal oil expansion box and the medium in the box, ensuring the stability of the thermal oil expansion box.

[0019] Furthermore, one end of the heating coil located at the head of the crude oil separation device is connected to the bottom end of the thermal oil expansion tank through a thermal oil expansion tank connecting pipeline, so that a closed loop is formed inside the thermal oil expansion tank, the thermal oil expansion tank connecting pipeline, the heating coil, and the crude oil separation device, thereby realizing the transfer and recycling of thermal energy. Thermal energy can circulate in the closed loop, thereby improving the efficiency of thermal energy transfer and reducing energy waste.

[0020] Furthermore, the electric heating rod adjusts its heating power through the electric heating rod controller, thereby controlling the temperature of the electric heating.

[0021] The electric heating rod controller can adjust the heating power of the electric heating rod as needed, thereby realizing the temperature control of electric heating. By accurately controlling the heating power, the electric heating rod can provide the required constant temperature or temperature change curve to meet the process requirements. The electric heating rod controller can adjust the heating power according to actual needs to avoid energy waste.

[0022] Furthermore, the heating coil is in the form of fins.

[0023] Fin-shaped heating coils can effectively increase the heating surface area, improve the efficiency of heat transfer, and make heating more uniform and faster. Since fin-shaped heating coils can provide a larger heating surface area and higher heat transfer efficiency, the equipment size can be reduced under the same heating requirements, which is very beneficial for applications with limited space in reservoir-type gas storage well sites and the need for integrated heating systems. Fin-shaped heating coils have high structural strength and pressure resistance. The fin design can increase the rigidity and stability of the heating coils, enabling them to withstand higher pressures and stresses. This is very important for applications working in high pressure or high temperature environments, and can ensure the safe and reliable operation of the equipment.

[0024] Furthermore, the heating coil is connected to the crude oil separation device and the heat transfer oil expansion tank connecting pipeline through flanges.

[0025] The flange connection provides flexibility and disassembly, making the connection between the heating coil, crude oil separation device and thermal oil expansion tank easy to install, disassemble and repair. By disassembling the flange connection, any component can be replaced or repaired without affecting the normal operation of other parts, which can improve the maintainability and reliability of the equipment.

[0026] Furthermore, the crude oil separation device, the heat transfer oil expansion tank, the heating coil, the electric heating rod and the electric heating rod controller are integrated together and integrated with other control units on a steel skid.

[0027] Integrating multiple devices on a steel skid can make full use of space and reduce the floor space of the equipment. This is very important for applications with limited space, as it can improve the layout density and production efficiency of the equipment. Integrating multiple devices on a steel skid can achieve system integration and modularization. The overall skid is simple in structure, easy to transport to other production sites, and has wide applicability.

[0028] The beneficial effects of the present invention are embodied in:

[0029] The present invention provides a method for maintaining the temperature of a crude oil separation device used in a well site of an oil reservoir type gas storage reservoir. In view of the current situation that a gas storage well site needs to use an electric heating plate for temperature maintenance or a heating furnace for heating and maintaining the temperature of the equipment, a heat transfer oil expansion tank and an electric heating structure are added to the head of a conventional crude oil separation device to combine the two functional devices into one. Compared with temperature maintenance by an electric heating plate, this method has higher thermal efficiency, more uniform heating, and lower purchase cost. Compared with temperature maintenance by a heating furnace, this method reduces the cost of a wellhead heating furnace, reduces the floor space occupied by a wellhead heating furnace skid, effectively reduces the workload on site, and effectively reduces safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the temperature maintenance of a crude oil separation device for a well site of an oil reservoir type gas storage reservoir of the present invention;

[0031] Figure 2 It is a schematic diagram of the temperature maintenance process of the crude oil separation device for the well site of the oil reservoir type gas storage reservoir of the present invention;

[0032] Figure 3 This is a three-dimensional effect diagram of temperature maintenance of a crude oil separation device for a well site of an oil reservoir type gas storage reservoir of the present invention;

[0033] In the figure: 1. Thermal oil expansion tank; 2. Steel bracket; 3. Thermal oil expansion tank connecting pipeline; 4. Electric heating rod; 5. Heating coil. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Example 1

[0037] This embodiment provides a method for maintaining temperature of a crude oil separation device for a well site of an oil reservoir type gas storage reservoir. A steel platform is provided at the end of one side of the crude oil separation device, and the steel platform is connected to the end of the crude oil separation device through a steel bracket 2. The heat transfer oil expansion tank 1 is placed on the steel platform to support the weight of the heat transfer oil expansion tank 1 and the medium in the tank. One or more groups of heating coils 5 are provided at the end of the crude oil separation device according to the required temperature maintenance temperature. An electric heating rod 4 is inserted into the heating coil 5. The electric heating rod 4 is controlled by an electric heating rod controller to adjust its power as needed. Compared with the conventional crude oil separator, the heating coil 5 of this innovative achievement adopts a fin form, and the heat dissipation area is expanded by 2 to 3 times compared with ordinary components, which improves thermal efficiency and reduces power consumption. One end of the heating coil 5 located at the end of the crude oil separation device is connected to the bottom end of the heat transfer oil expansion tank 1 through a flange to form a closed loop pipeline. The finned heating coil 5 in the crude oil separation device and the external connection section are connected by flanges to facilitate replacement and maintenance. The temperature of the medium in the heating coil 5 is increased by heating the electric heating rod 4, thereby realizing the function of temperature maintenance. The crude oil separation device is integrated with the thermal oil expansion tank 1, the heating coil 5, the electric heating rod 4, the electric heating rod controller, etc. to form a device with a temperature maintenance function. The electric heating rod 4 can adjust the power of the electric heating rod through the controller, thereby controlling the temperature of the electric heating. The device is integrated and skid-mounted as a whole, with a simple structure, which is easy to transport to other production sites and has wide applicability.

[0038] In view of the current situation that gas storage well sites need to use electric heating plates for temperature maintenance or heating furnaces for heating and temperature maintenance of equipment, the present invention adds a heat transfer oil expansion tank and an electric heating structure at the head of a conventional crude oil separation device, combining the two functional devices into one. Compared with temperature maintenance by electric heating plates, this method has higher thermal efficiency, more uniform heating, and lower purchase costs. Compared with temperature maintenance by heating furnaces, this method reduces the cost of a wellhead heating furnace (approximately RMB 280,000) and the floor space of a wellhead heating furnace skid (approximately 30 square meters), effectively reducing the workload on site and effectively reducing safety risks.

[0039] Preferably, in addition to adding heating coils, heating rods, heat transfer oil expansion tanks, controllers and other structures to the crude oil separation device to form a whole, the present invention also integrates other control units on a steel skid. This method has the characteristics of being suitable for maintaining the temperature of the crude oil separation device in the well site of an oil reservoir-type gas storage reservoir, and is skid-mounted as an entirety, which is convenient for overall transportation and has wide applicability.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A temperature maintenance method for a crude oil separation device used in a well site of an oil reservoir type gas storage reservoir, It is characterized in that At least one set of heating coils (5) is arranged from a sealing head on one side of the crude oil separation device to the inside of the crude oil separation device, and an electric heating rod (4) is inserted into the heating coils (5); a heat transfer oil expansion tank (1) connected to the inside of the crude oil separation device is arranged on a sealing head on one side of the crude oil separation device to absorb the volume change caused by the thermal expansion of the heat transfer oil.

2. A temperature maintenance method for a crude oil separation device for a well site of an oil reservoir type gas storage according to claim 1, It is characterized in that A steel platform is provided at a head of one side of the crude oil separation device. The steel platform is connected to the head of the crude oil separation device via a steel support (2). A heat transfer oil expansion tank (1) is placed on the steel platform.

3. The temperature maintenance method of a crude oil separation device for a well site of an oil reservoir type gas storage according to claim 1, It is characterized in that One end of the heating coil (5) located at the end cap of the crude oil separation device is connected to the bottom end of the thermal oil expansion tank (1) through a thermal oil expansion tank connecting pipeline (3), so that a closed loop is formed inside the thermal oil expansion tank (1), the thermal oil expansion tank connecting pipeline (3), the heating coil (5), and the crude oil separation device.

4. A temperature maintenance method for a crude oil separation device for a well site of an oil reservoir type gas storage according to any one of claims 1 to 3, It is characterized in that The heating power of the electric heating rod (4) is adjusted by an electric heating rod controller, thereby controlling the temperature of the electric heating.

5. A temperature maintenance method for a crude oil separation device for a well site of an oil reservoir type gas storage according to any one of claims 1 to 3, It is characterized in that The heating coil (5) is in the form of fins.

6. A temperature maintenance method for a crude oil separation device for a well site of an oil reservoir type gas storage according to claim 3, It is characterized in that The heating coil (5) is connected to the crude oil separation device and the heat transfer oil expansion tank connecting pipeline (3) through flanges.

7. A temperature maintenance method for a crude oil separation device for a well site of an oil reservoir type gas storage according to claim 4, It is characterized in that The crude oil separation device, the heat transfer oil expansion tank (1), the heating coil (5), the electric heating rod (4) and the electric heating rod controller are arranged together in an integrated manner and integrated together with other control units on a steel skid.

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