An on-site synthesis system of offshore oilfield profile control agent particles

Abstract

The utility model relates to offshore oilfield water control and oil stabilization technical field, and specifically is an offshore oilfield profile control agent granule on -the -spot synthesis system, including three reagent storage tanks, three reagent adding metering pumps with motor rotating speed frequency modulator, electromagnetic temperature -rising pressure -rising reaction chamber with temperature -rising pressure -rising reaction time controller, high pressure metering pump, industrial control CPU and profile control well wellhead, three reagent storage tanks are connected with corresponding dosing pump through low pressure 1 " hose respectively, dosing pump export connects reaction chamber, and reaction chamber finished product export connects high pressure metering pump, and high pressure metering pump export is connected with wellhead through high pressure 1 " hose, and industrial control CPU connects frequency modulator and controller, and gathers pressure, flow and time parameter and preset parameter fitting, and the particle size of the synthesized granule is regulated to keep the Hall curve at 1.3-1.4, the synthesized granule is mixed with injection water and injected into the plugging layer, the synthesized granule of the system can be injected into 0.12-0.25mm coiled tubing without plugging, can accurately profile control and plug, and the skid-mounted occupies 10m 2 , can continuously work for 24 hours, is safe and reliable, does not harm human body and discharges waste material.

Description

Technical Field

[0001] This utility model relates to the field of water control and oil stabilization technology in offshore oilfields, specifically a field synthesis system for profile control agent particles in offshore oilfields. Background Technology

[0002] Compared to onshore oilfields, offshore oilfields exhibit high porosity and high permeability in their reservoir properties, requiring intensive extraction and injection. Onshore oilfields utilize only perforated completion methods with perforation diameters of 9-12 mm and possess numerous mature technologies for profile control and sealing of large pores in the oil reservoir, such as using bulk-expanded pre-crosslinked particles with a particle size of 0.5-8 mm and an expansion ratio of 5-10 times. In contrast, offshore oilfields employ perforation plus sand control screen completion methods, where the gaps for oil production or water injection channels are only 0.12-0.25 mm in wire-wound tubing. Therefore, profile control and sealing of large pores in offshore oilfields requires the use of micron-sized (10-50 µm) particles for bridging and plugging.

[0003] The technology of using micron-sized (10-50µm) particles for profile control and plugging of large pores in offshore oilfields is limited in practical applications. On the one hand, due to the small particle size, these particles are prone to bridging at the 0.12-0.25mm wire-wound tubing used in offshore oilfield well completions, preventing smooth particle injection. On the other hand, this technology cannot provide full-size particles, making it difficult to accurately match formation porosity and achieve the desired profile control and plugging effect. Therefore, in view of the above situation, there is an urgent need to develop an on-site synthesis system for offshore oilfield profile control agent particles to overcome the shortcomings in current practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a field synthesis system for profile control agent particles in offshore oil fields to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A field synthesis system for profile control agents in offshore oil fields, comprising: Multiple medicine storage tanks; Multiple drug addition metering pumps are provided, and the inlet of each drug addition metering pump is connected to the outlet of a drug storage tank via a pipeline. Each drug addition metering pump is equipped with a motor speed regulator. The electromagnetic heating and pressurizing reaction chamber has its inlet connected to the outlet of all the reagents added by the metering pump via a pipeline. The electromagnetic heating and pressurizing reaction chamber is equipped with a heating and pressurizing reaction time controller. A high-pressure metering pump, the inlet of which is connected to the finished product outlet of the electromagnetic heating and pressurizing reaction chamber via a pipeline; The wellhead of the profile control well is connected to the outlet of the high-pressure metering pump via a pipeline; and The industrial control CPU is connected to each of the motor speed frequency regulators and the temperature and pressure rise response time controllers.

[0006] As a further embodiment of this utility model: the number of the medicine storage tanks is three, and three medicine addition metering pumps and three motor speed regulators are provided accordingly.

[0007] As a further embodiment of this utility model: the pipeline includes a low-pressure hose and a high-pressure hose; The pipeline between the drug storage tank and the drug addition metering pump, the pipeline between the drug addition metering pump and the electromagnetic heating and pressurizing reaction chamber, and the pipeline between the electromagnetic heating and pressurizing reaction chamber and the high-pressure metering pump are low-pressure hoses, while the pipeline between the high-pressure metering pump and the wellhead of the profile adjustment well is a high-pressure hose.

[0008] As a further embodiment of this utility model: the low-pressure hose is a 1-inch hose, and the high-pressure hose is a 1-inch high-pressure hose.

[0009] As a further embodiment of this utility model: the industrial control CPU is connected to the wellhead of the profile adjustment well.

[0010] As a further embodiment of this utility model: the system is a skid-mounted structure, occupying an area of ​​10m². 2 .

[0011] As a further embodiment of this invention: the finished product outlet of the electromagnetic heating and pressurizing reaction chamber is connected to the inlet of the high-pressure metering pump via a low-pressure hose.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention relates to an on-site synthesis system for profile control agent particles in offshore oilfields. The particle size of the synthesized profile control agent particles can be adjusted online according to actual needs, and the adjusted particles can be injected online without clogging the 0.12-0.25mm wire-wound tubing used for well completion in offshore oilfields. This effectively solves the problem of difficult particle injection in the prior art. 2. The system can adjust the concentration of the synthetic agent and the reaction temperature, pressure and time in the electromagnetic heating and pressurizing reaction chamber in a timely manner according to the injection pressure, so that the size of the synthetic particles can be flexibly adjusted to achieve precise profile control and sealing of large channels in the oil layer. It can also use the industrial control CPU to collect pressure, flow and time parameters and fit them with preset "climbing" pressure parameters and Hall curves to keep the Hall curve of the particle profile control process between 1.3 and 1.4, ensuring that the synthetic particles can accurately match the formation porosity. 3. The entire set of equipment is designed as a skid, which occupies a small area (only 10m²) and will not affect other construction work on the offshore platform, making it highly adaptable. 4. The system requires only 4 people to construct, which greatly reduces the intensity of manual labor and enables continuous 24-hour construction, thus improving construction efficiency. 5. The system operates safely and reliably. It will not cause harm to the human body or discharge waste materials during the entire process of particle synthesis and injection, and meets the requirements of environmental protection and safe construction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the on-site synthesis system for profile control agent particles in offshore oilfields according to this utility model.

[0014] In the diagram: 1-Medicine storage tank one, 2-Medicine storage tank two, 3-Medicine storage tank three, 4-Medicine metering pump one, 5-Medicine metering pump two, 6-Medicine metering pump three, 7-Motor speed frequency regulator one, 8-Motor speed frequency regulator two, 9-Motor speed frequency regulator three, 10-Electromagnetic heating and pressurizing reaction chamber, 11-Heating and pressurizing reaction time controller, 12-High pressure metering pump, 13-Industrial control CPU, 14-Profiling wellhead. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] Please see Figure 1 This utility model provides a field synthesis system for profile control agents in offshore oilfields, comprising a reagent addition section, a synthesis section, a granule injection section, and a control section, as detailed below: I. Addition of pharmaceuticals; This section includes a medicine storage tank 1, a medicine storage tank 2, a medicine storage tank 3, a medicine metering pump 1, a medicine metering pump 2, a medicine metering pump 3, and a motor speed frequency regulator 1, a motor speed frequency regulator 2, and a motor speed frequency regulator 3.

[0018] The outlet of the first drug storage tank is connected to the inlet of the first drug metering pump 4 via a low-pressure 1" hose; the outlet of the second drug storage tank is connected to the inlet of the second drug metering pump 5 via a low-pressure 1" hose; and the outlet of the third drug storage tank is connected to the inlet of the third drug metering pump 6 via a low-pressure 1" hose, thereby realizing the separate storage and corresponding delivery of the three drugs. The metering pump 4 is equipped with a motor speed frequency controller 7, the metering pump 5 is equipped with a motor speed frequency controller 8, and the metering pump 6 is equipped with a motor speed frequency controller 9. Each motor speed frequency controller independently controls the dosage of the corresponding metering pump, ensuring that the dosage of the three drugs can be accurately controlled. The outlet of metering pump 4 is connected to the electromagnetic heating and pressurizing reaction chamber 10 via a low-pressure 1" hose. The outlet of metering pump 5 is connected to the electromagnetic heating and pressurizing reaction chamber 10 via a low-pressure 1" hose. The outlet of metering pump 6 is connected to the electromagnetic heating and pressurizing reaction chamber 10 via a low-pressure 1" hose, so that the three reagents can enter the reaction chamber together to participate in the synthesis.

[0019] Based on the results of the indoor research, the three chemical reagents (propylene monomer, initiator, and crosslinking agent) required for particle synthesis were added to reagent storage tank 1, reagent storage tank 2, and reagent storage tank 3, respectively. Subsequently, motor speed regulators 7, 8, and 9 were calibrated to determine the corresponding motor speed for each reagent at the preset addition concentration (e.g., reagent A corresponds to reagent storage tank 1 and reagent addition metering pump 4, and its speed at a specific concentration needs to be calibrated using motor speed regulator 7). After calibration, reagent addition metering pumps 4, 5, and 6 were started. Under the independent control of motor speed regulators 7, 8, and 9, the reagents in the three reagent storage tanks were pumped to the electromagnetic heating and pressurizing reaction chamber 10 at preset concentrations to provide raw materials for subsequent particle synthesis.

[0020] II. Synthesis Section; This part includes an electromagnetic heating and pressurizing reaction chamber 10 and a heating and pressurizing reaction time controller 11.

[0021] The electromagnetic heating and pressurizing reaction chamber 10 is equipped with a heating and pressurizing reaction time controller 11, which is used to control the reaction temperature, pressure and reaction time in the electromagnetic heating and pressurizing reaction chamber 10. The finished product outlet of the electromagnetic heating and pressurizing reaction chamber 10 is connected to the inlet of the high-pressure metering pump 12 via a 1" low-pressure hose, which is used to transport the synthesized particles to the subsequent injection stage.

[0022] The relevant parameters for particle synthesis are preset on the heating and pressurizing reaction time controller 11, specifically including a synthesis concentration of 20%, and reaction temperatures (180, 145, 130, 120, 120℃), pressures (5, 4, 3.5, 3, 2 MPa), and reaction times (25, 22, 20, 18, 18 min) corresponding to particle sizes of 100µm, 80µm, 50µm, 30µm, and 10µm, respectively. After the three reagents enter the electromagnetic heating and pressurizing reaction chamber 10 through reagent addition metering pump 1 4, reagent addition metering pump 2 5, and reagent addition metering pump 3 6, respectively, the heating and pressurizing reaction time controller 11 controls the environment inside the electromagnetic heating and pressurizing reaction chamber 10 to reach the preset temperature and pressure, and maintains the preset reaction time, so that the reagents react in the chamber to generate profile control agent particles of the target particle size. After the particle synthesis is completed, it is automatically transferred to the finished product chamber of the electromagnetic heating and pressurizing reaction chamber 10, waiting for subsequent delivery.

[0023] III. Granule Injection Section; This section includes a high-pressure metering pump 12 and a profile control wellhead 14.

[0024] The inlet of the high-pressure metering pump 12 is connected to the finished product outlet of the electromagnetic heating and pressurizing reaction chamber 10 through a 1" low-pressure hose, and is used to draw in the synthesized profile control agent particles. The outlet of the high-pressure metering pump 12 is connected to the wellhead 14 of the profile control well via a high-pressure 1" hose, and is used to pump profile control agent particles to the wellhead 14 of the profile control well.

[0025] The high-pressure metering pump 12 is started. The high-pressure metering pump 12 draws in the synthesized profile control agent particles from the finished product chamber of the electromagnetic heating and pressurizing reaction chamber 10, and delivers the particles to the wellhead 14 of the profile control well through the high-pressure hose. At the wellhead 14 of the profile control well, the profile control agent particles are fully mixed with the injected water of the profile control well. Then the mixture is injected into the layer to be sealed by the injection water flow, thereby sealing the large pores of the oil layer.

[0026] IV. Control Section; This part includes an industrial control CPU 13, a motor speed frequency regulator 1 7, a motor speed frequency regulator 2 8, a motor speed frequency regulator 3 9, and a temperature and pressure rise response time controller 11.

[0027] An industrial control CPU 13 is installed on the wellhead 14 of the profile adjustment well; The industrial control CPU 13 is connected to motor speed frequency modulator 1 7, motor speed frequency modulator 2 8, motor speed frequency modulator 3 9 and temperature and pressure rise response time controller 11 via signal control cables. It can send control commands to each motor speed frequency modulator and temperature and pressure rise response time controller 11 individually, and receive parameters fed back by each component (such as the real-time speed of the reagent addition metering pump 4 fed back by motor speed frequency modulator 1 7, and the real-time speed of the reagent addition metering pump 2 8 fed back by motor speed frequency modulator 2 5, etc.).

[0028] The industrial control CPU13 collects pressure, flow, and time parameters at wellhead 14 of the profile control well in real time, and compares the collected actual parameters with the preset "climbing" pressure parameter (0.5 MPa / 1000 m). 3 The process involves fitting and analyzing the Hall curve (k-value ratio 1.3-1.4). If the fitting result shows that the "climbing" pressure parameter is too large, it indicates that the particle size of the synthesized particles is too large, which may lead to injection difficulties. At this time, the industrial control CPU13 immediately issues an instruction: on the one hand, it controls the motor speed frequency modulator 17, motor speed frequency modulator 28, and motor speed frequency modulator 39 to adjust the dosage of the reagent addition metering pump 14, reagent addition metering pump 25, and reagent addition metering pump 36 respectively; on the other hand, it controls the heating and pressurizing reaction time controller 11 to adjust the reaction temperature, pressure, and time in the electromagnetic heating and pressurizing reaction chamber 10, thereby synthesizing particles with a smaller particle size. If the fitting result shows that the "climbing" pressure parameter is too small, it indicates that the particle size of the synthesized particles is too small, and the sealing effect is not good. At this time, the industrial control CPU13 issues an instruction to synthesize particles with a larger particle size. Through the above real-time control, the Hall curve of the particle profile control process is ultimately kept between 1.3 and 1.4, ensuring that the particle size and concentration of the synthesized profile control agent particles are always within the design range, achieving precise profile control and sealing.

[0029] The model numbers of the relevant components used in the system are as follows: Medicine storage tank 1, medicine storage tank 2, medicine storage tank 3: 1 unit 316L, self-made; 4. Metering pump 1 for adding medicine; 5. Metering pump 2 for adding medicine; 6. Metering pump 3 for adding medicine: Model JZM-A167 / 1, made in Zhejiang Ailipu. High-pressure metering pump 12: Model J50-1500 / 16, manufactured in Zhejiang Ailipu; Industrial control CPU13: Model 8080D, manufactured by Siemens; Electromagnetic heating and pressurizing reaction chamber 10:2m³, model MCR-40 / 40-5, manufactured in Nanyang Motor Factory, Henan Province; Temperature and pressure rise reaction time controller 11: Model S7-200, made by Siemens; Motor speed frequency regulator 1 7, Motor speed frequency regulator 2 8, Motor speed frequency regulator 3 9: Model ACS510, Made by ABB.

[0030] In summary, the on-site synthesis system for profile control particles in this offshore oilfield achieves the following technical effects through the coordinated operation of the aforementioned components: The particle size of the synthesized profile control agent can be adjusted online according to actual needs, and the adjusted particles can be injected online without clogging the 0.12-0.25mm wire-wound tubing used for well completion in offshore oil fields; Relying on the real-time control function of the industrial control CPU13, the concentration of the synthetic agent can be changed in a timely manner according to the injection pressure at the wellhead 14 of the profile control well (controlled by motor speed frequency modulator 17, motor speed frequency modulator 28, and motor speed frequency modulator 39), as well as the reaction temperature, pressure, and time in the electromagnetic heating and pressurizing reaction chamber 10, so that the size of the synthetic particles is precisely matched with the formation porosity, and precise profile control and plugging can be achieved. The entire set of equipment adopts a skid-mounted design, occupies an area of ​​only 10m², takes up little space, and will not affect other construction activities on the offshore platform; The equipment is easy to operate, requiring only 4 workers during construction, which greatly reduces the intensity of manual labor and enables continuous 24-hour construction, thus improving construction efficiency. The equipment operates safely and reliably, and will not cause harm to the operator's body during the entire particle synthesis and injection process. There is no waste discharge, which meets the requirements of environmental protection and safe construction.

[0031] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A field synthesis system for profile control agent particles in offshore oilfields, characterized in that, include: Multiple medicine storage tanks; Multiple drug addition metering pumps are provided, and the inlet of each drug addition metering pump is connected to the outlet of a drug storage tank via a pipeline. Each drug addition metering pump is equipped with a motor speed regulator. The electromagnetic heating and pressurizing reaction chamber has its inlet connected to the outlet of all the reagents added by the metering pump via a pipeline. The electromagnetic heating and pressurizing reaction chamber is equipped with a heating and pressurizing reaction time controller. A high-pressure metering pump, the inlet of which is connected to the finished product outlet of the electromagnetic heating and pressurizing reaction chamber via a pipeline; The wellhead of the profile control well is connected to the outlet of the high-pressure metering pump via a pipeline; and The industrial control CPU is connected to each of the motor speed frequency regulators and the temperature and pressure rise response time controllers.

2. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 1, characterized in that, The number of drug storage tanks is three, and there are three drug addition metering pumps and three motor speed regulators.

3. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 1, characterized in that, The pipeline includes low-pressure hoses and high-pressure hoses; The pipeline between the drug storage tank and the drug addition metering pump, the pipeline between the drug addition metering pump and the electromagnetic heating and pressurizing reaction chamber, and the pipeline between the electromagnetic heating and pressurizing reaction chamber and the high-pressure metering pump are low-pressure hoses, while the pipeline between the high-pressure metering pump and the wellhead of the profile adjustment well is a high-pressure hose.

4. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 3, characterized in that, The low-pressure hose is a 1-inch hose, and the high-pressure hose is a 1-inch high-pressure hose.

5. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 1, characterized in that, The industrial control CPU is connected to the wellhead of the profile adjustment well.

6. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 1, characterized in that, The system is a skid-mounted structure, occupying an area of ​​10m². 2 .

7. The offshore oilfield profile control agent particle in-situ synthesis system according to claim 1, characterized in that, The finished product outlet of the electromagnetic heating and pressurizing reaction chamber is connected to the inlet of the high-pressure metering pump via a low-pressure hose.

Images