Oil and gas well optical fiber monitoring simulation device

Abstract

The utility model relates to an oil and gas well optical fiber monitoring simulation device which comprises a simulation shaft, a gas-liquid-solid mixing system, a sand production system and a distributed optical fiber detection system. The simulation wellbore is provided with a plurality of perforation clusters, the perforation clusters are provided with adjustable interfaces, the adjustable interfaces are connected with a main pipeline, and the main pipeline is connected with a gas-liquid-solid mixing system and a sand production system; a liquid heating layer is arranged on the outer side of the simulation shaft and is connected with the main hydraulic pump and the temperature control liquid tank; the simulation shaft is connected with the gas recovery tank and the solid-liquid recovery tank; the distributed optical fiber detection system comprises a laser light source, a temperature sensing optical fiber and a signal receiver, and the temperature sensing optical fiber is tightly attached to the inner wall of the simulation shaft. According to the utility model, various environments and the output of solid, liquid and gas in the shaft can be simulated, the adjustability can simulate the production environments of different layer sections, a reliable basis is provided for the next step of optimizing the exploitation of oil and gas, and the device has important significance for improving the efficient exploitation of oil and gas reservoirs.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas exploitation, and more specifically to an optical fiber monitoring simulation device for oil and gas wells. Background Art

[0002] In the development and production of oil and gas wells, the dynamic distribution of oil, gas, water and sand is obtained, which provides a scientific basis for optimizing oil and gas production plans and improving crude oil recovery. The measurement parameters of production logging include flow, temperature, density, pressure and other parameters of downhole fluids. The electronic circuits of traditional downhole logging instruments are prone to failure when working in a high temperature and high pressure environment, so they have to be measured repeatedly, which increases the testing cost and the probability of the instrument falling into the wellbore.

[0003] The different water outputs, gas-water ratios, and volume ratios of fluids entering the wellbore at each level of fracture after fracturing will cause differences in the temperature profiles of horizontal wells, resulting in irregular distribution of temperature profiles during horizontal well production, greatly increasing the difficulty of interpreting the output profile from the temperature distribution, evaluating the completion effect, and interpreting the fracture parameters.

[0004] The production of oil, gas, water and sand in the wellbore during the production process is a common phenomenon in the development of oil and gas wells. The sand particles in the formation move from the reservoir to the wellbore with the flow of oil or natural gas, which may cause wellbore failure, safety valve damage, ground equipment and pipeline abnormalities and other problems. Therefore, the accuracy and reliability of logging are particularly important in optimizing the exploitation and maintenance of oil and gas fields. Most of the testing costs are caused by failures of instrument components due to insufficient temperature resistance and engineering accidents. The measurement accuracy of existing production logging downhole measurement instruments can no longer meet the needs of current oil and gas development. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an oil and gas well optical fiber monitoring simulation device which can simulate various environments in the wellbore and the output of solid, liquid and gas, so as to simulate the production environment of different layers.

[0006] The technical solution adopted by the utility model to solve the technical problem is: constructing an oil and gas well optical fiber monitoring simulation device, including a simulated wellbore, a gas-liquid-solid mixing system, a sand production system and a distributed optical fiber detection system;

[0007] The simulated wellbore is provided with a plurality of perforation clusters, and an adjustable interface is installed on the perforation cluster, and the adjustable interface is connected to the main pipeline, and the main pipeline is connected to the gas-liquid-solid mixing system and the sand production system; a liquid heating layer is provided on the outside of the simulated wellbore, and the liquid heating layer is connected to the main hydraulic pump and the temperature-controlled liquid tank; the simulated wellbore is connected to the gas recovery tank and the solid-liquid recovery tank; the distributed optical fiber detection system includes a laser light source, a temperature-sensitive optical fiber and a signal receiver, and the temperature-sensitive optical fiber is arranged close to the inner wall of the simulated wellbore.

[0008] In the above scheme, the sand production system includes a sand tank, a first assembled pipeline, a constant temperature box, a first hydraulic pump, a first temperature-controlled water tank, a first control cabinet, a first air storage tank, a first booster pump and a first air source;

[0009] The first assembled pipeline is connected to the main pipeline, the first assembled pipeline is located inside the sand tank, a gas-liquid inlet is provided on the sand tank, a constant temperature box is provided on the outside of the sand tank, the gas-liquid inlet is respectively connected to the first gas storage tank and the first hydraulic pump, the first hydraulic pump is connected to the first temperature-controlled water tank, the first gas storage tank is connected to the first gas source through the first booster pump, and the first hydraulic pump, the first temperature-controlled water tank and the first booster pump are connected to the first control cabinet.

[0010] In the above solution, a first flow meter is provided at the outlet of the first gas storage tank.

[0011] In the above solution, a first pressure regulating valve is provided between the first gas storage tank and the gas-liquid inlet.

[0012] In the above scheme, the gas-liquid-solid mixing system includes a mixer, a second assembled pipeline, a second hydraulic pump, a second temperature-controlled water tank, a second control cabinet, a second gas storage tank, a second booster pump and a second gas source;

[0013] The second assembled pipeline is connected to the main pipeline, and the second assembled pipeline is connected to the mixer. The mixer is provided with a sand inlet, an air inlet and a liquid inlet, the air inlet is connected to the second air storage tank, the liquid inlet is connected to the second hydraulic pump, the sand inlet is connected to the sand discharge system, the second hydraulic pump is connected to the second temperature-controlled water tank, the second air storage tank is connected to the second air source through the second booster pump, and the second hydraulic pump, the second temperature-controlled water tank and the second booster pump are connected to the second control cabinet.

[0014] In the above solution, a second flow meter is provided at the outlet of the second gas storage tank.

[0015] In the above solution, a second pressure regulating valve is provided between the second gas storage tank and the gas inlet.

[0016] The implementation of the oil and gas well optical fiber monitoring simulation device of the utility model has the following beneficial effects:

[0017] The utility model device can simulate various environments and the output of solid, liquid and gas in the wellbore. This adjustability can simulate the production environment of different layers. It provides a reliable basis for the next step of optimizing oil and gas exploitation, and is of great significance to improving the efficient development of oil and gas reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the optical fiber detection simulation device for oil and gas wells of the utility model;

[0020] Figure 2 It is the structural schematic diagram of the sand production system;

[0021] Figure 3 This is a schematic diagram of the structure of a sand production simulation device for oil / gas wells;

[0022] Figure 4 It is a schematic diagram of the structure of a simulation device for simultaneous production of oil, gas and water in an oil well and a simulation device for simultaneous production of gas and water in a gas well;

[0023] Figure 5 It is a schematic diagram of the structure of the gas-liquid-solid mixing system (mixed phase outside the wellbore);

[0024] Figure 6 It is a schematic diagram of the structure of a gas-liquid-solid mixing system (mixed phase in the wellbore), an oil well oil-water-gas co-output simulation device, and a gas well gas-water co-output simulation device. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0026] As attached Figure 1-6 As shown, the optical fiber monitoring simulation device for oil and gas wells of the utility model comprises a simulated wellbore 3, a gas-liquid-solid mixing system 6, a sand production system 7 and a distributed optical fiber detection system.

[0027] A plurality of perforation clusters 12 are provided on the simulated wellbore 3, and an adjustable interface 1 is installed on the perforation cluster 12, and the adjustable interface 1 is connected to the main pipeline 5, and the main pipeline 5 is connected to the gas-liquid-solid mixing system 6 and the sand production system 7. A liquid heating layer 2 is provided on the outside of the simulated wellbore 3, and the liquid heating layer 2 is connected to the main hydraulic pump 8 and the temperature-controlled liquid tank 9. A high-definition camera 4 is also provided on the outside of the simulated wellbore 3. The simulated wellbore 3 is connected to the gas recovery tank 10 and the solid-liquid recovery tank 11. The distributed optical fiber detection system includes a laser light source 14, a temperature-sensitive optical fiber 13 and a signal receiver 14, and the temperature-sensitive optical fiber 13 is arranged close to the inner wall of the simulated wellbore 3. Turn on the laser light source 14, observe the temperature profile data measured by the signal receiver, and record the data after the temperature profile stabilizes.

[0028] In this embodiment, the simulated wellbore 3 is replaced by a casing with a steel grade of TP110TT and an outer diameter of 177.8 mm instead of a horizontal well section. The casing includes eighteen perforation clusters 12, and a two-way adjustable interface 1 is installed on the perforation clusters 12 to adjust the reservoir production.

[0029] Furthermore, the sand production system 7 includes a sand tank 702 , a first assembled pipeline 703 , a constant temperature box 704 , a first hydraulic pump 705 , a first temperature-controlled water tank 706 , a first control cabinet 707 , a first air storage tank 710 , a first booster pump 711 and a first air source 712 .

[0030] The first assembled pipeline 703 is connected to the main pipeline 5. The first assembled pipeline 703 is located inside the sand tank 702. The sand tank 702 is provided with a gas-liquid inlet 701. A thermostat 704 is provided outside the sand tank 702. The gas-liquid inlet 701 is connected to the first gas storage tank 710 and the first hydraulic pump 705 respectively. The first hydraulic pump 705 is connected to the first temperature-controlled water tank 706. The first gas storage tank 710 is connected to the first gas source 712 through the first booster pump 711. The first hydraulic pump 705, the first temperature-controlled water tank 706 and the first booster pump 711 are connected to the first control cabinet 707. The outlet of the first gas storage tank 710 is provided with a first flowmeter 709, and a first pressure regulating valve 708 is provided between the first gas storage tank 710 and the gas-liquid inlet 701.

[0031] Further, the gas-liquid-solid mixing system 6 includes a mixer 606, a second assembled pipeline 604, a second hydraulic pump 601, a second temperature-controlled water tank 602, a second control cabinet 603, a second air tank 609, a second booster pump 610, and a second gas source 611. The second assembled pipeline 604 is connected to the main pipeline 5, and the second assembled pipeline 604 is connected to the mixer 606. The mixer 606 is provided with a sand inlet 605, an air inlet, and a liquid inlet. The air inlet is connected to the second air tank 609, and the liquid inlet is connected to the second hydraulic pump 601. The sand inlet 605 is connected to the sand outlet system 7 to achieve sand feeding. The second hydraulic pump 601 is connected to the second temperature-controlled water tank 602, and the second air tank 609 is connected to the second gas source 611 through the second booster pump 610. The second hydraulic pump 601, the second temperature-controlled water tank 602, and the second booster pump 610 are connected to the second control cabinet 603. A second flow meter 608 is provided at the outlet of the second gas storage tank 609 , and a second pressure regulating valve 607 is provided between the second gas storage tank 609 and the air inlet.

[0032] The specific steps of the experimental method of the optical fiber monitoring simulation device of the utility model are as follows:

[0033] Turn on the laser light source, observe the temperature profile data measured by the signal receiver, and record the data after the temperature profile stabilizes.

[0034] Open the sand tank to allow it to enter the mixer; adjust the temperature-controlled water tank and when the water temperature reaches the corresponding experimental requirements, it enters the mixer through the hydraulic pump; open the gas source, pump the gas into the gas tank through the booster pump, open the gas tank valve to allow it to enter the mixer, and observe the changes in the flow meter.

[0035] By controlling the flow rates of gas and liquid and the amount of sand, the gas enters the mixer at a flow rate corresponding to the experimental requirements, the liquid enters the mixer at a flow rate corresponding to the experimental requirements, and the sand enters the mixer at an amount corresponding to the experimental requirements. After the gas, liquid and sand are fully mixed to form a gas-liquid-solid mixture with different gas-liquid-solid ratios, the flow rate of the gas-liquid-solid mixture is once again controlled through the adjustable interface to enter the casing.

[0036] By adjusting the flow control valves on the pipeline, the flow of gas, liquid and solid is changed, and the gas-liquid-solid ratio is changed accordingly. Repeat this step to measure different temperatures, pressure differences and flow data.

[0037] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. An oil and gas well optical fiber monitoring simulation device, characterized in that: Includes simulated wellbore, gas-liquid-solid mixing system, sand production system and distributed fiber optic detection system; The simulated wellbore is provided with a plurality of perforation clusters, and an adjustable interface is installed on the perforation cluster, and the adjustable interface is connected to the main pipeline, and the main pipeline is connected to the gas-liquid-solid mixing system and the sand production system; a liquid heating layer is provided on the outside of the simulated wellbore, and the liquid heating layer is connected to the main hydraulic pump and the temperature-controlled liquid tank; the simulated wellbore is connected to the gas recovery tank and the solid-liquid recovery tank; the distributed optical fiber detection system includes a laser light source, a temperature-sensitive optical fiber and a signal receiver, and the temperature-sensitive optical fiber is arranged close to the inner wall of the simulated wellbore.

2. The oil and gas well optical fiber monitoring simulation device according to claim 1, characterized in that: The sand production system includes a sand tank, a first assembled pipeline, a constant temperature box, a first hydraulic pump, a first temperature-controlled water tank, a first control cabinet, a first air storage tank, a first booster pump and a first air source; The first assembled pipeline is connected to the main pipeline, the first assembled pipeline is located inside the sand tank, a gas-liquid inlet is provided on the sand tank, a constant temperature box is provided on the outside of the sand tank, the gas-liquid inlet is respectively connected to the first gas storage tank and the first hydraulic pump, the first hydraulic pump is connected to the first temperature-controlled water tank, the first gas storage tank is connected to the first gas source through the first booster pump, and the first hydraulic pump, the first temperature-controlled water tank and the first booster pump are connected to the first control cabinet.

3. The oil and gas well optical fiber monitoring simulation device according to claim 2, characterized in that: The outlet of the first gas storage tank is provided with a first flow meter.

4. The oil and gas well optical fiber monitoring simulation device according to claim 2, characterized in that: A first pressure regulating valve is provided between the first gas storage tank and the gas-liquid inlet.

5. The oil and gas well optical fiber monitoring simulation device according to claim 1, characterized in that: The gas-liquid-solid mixing system includes a mixer, a second assembled pipeline, a second hydraulic pump, a second temperature-controlled water tank, a second control cabinet, a second gas storage tank, a second booster pump and a second gas source; The second assembled pipeline is connected to the main pipeline, and the second assembled pipeline is connected to the mixer. The mixer is provided with a sand inlet, an air inlet and a liquid inlet, the air inlet is connected to the second air storage tank, the liquid inlet is connected to the second hydraulic pump, the sand inlet is connected to the sand discharge system, the second hydraulic pump is connected to the second temperature-controlled water tank, the second air storage tank is connected to the second air source through the second booster pump, and the second hydraulic pump, the second temperature-controlled water tank and the second booster pump are connected to the second control cabinet.

6. The oil and gas well optical fiber monitoring simulation device according to claim 5, characterized in that: The outlet of the second gas storage tank is provided with a second flow meter.

7. The oil and gas well optical fiber monitoring simulation device according to claim 5, characterized in that: A second pressure regulating valve is provided between the second gas storage tank and the gas inlet.

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