RU2704037C1 - Reagent dosing unit to pipeline - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular to devices for monitoring and controlling operations for introduction into pipeline of various compositions using batchers with external control for repeated measurement and dispensing of specified volumes of liquid chemical reagents (demulsifiers) into pipeline system of well product transportation, and can be used for field preparation of well products. Reagent dosing unit in pipeline includes reagent supply unit made in the form of vessel with reagent, level sensor, measuring tube; frequency converter connected via an electric motor with a dosing pump; well production transportation pipeline passing through oil metering unit; pipeline communicating vessel with reagent with dosing pump; pipeline that connects the metering pump to the well production transportation pipeline. Oil metering unit is configured to measure such parameters as fluid flow rate, density, temperature, pressure and water cut, and the apparatus comprises a data transmission module configured to implement an algorithm for determining the required reagent feed rate depending on the product water content and equipped with a wireless data collection and transmission system in real time using a GPRS modem, connected by wireless communication with oil metering unit, frequency converter of dosing pump engine and moisture meter installed at outlet of settlers unit.

EFFECT: reduced consumption of reagent-demulsifier at preparation of borehole products due to increased accuracy of regulation of specific consumption of reagent.

1 cl, 1 dwg

Description

FIELD OF THE INVENTION

The invention relates to the oil industry, in particular, to devices for monitoring and controlling operations for introducing various compositions into the pipeline using dispensers with external control for repeated measurement and delivery of predetermined volumes of liquid chemicals (demulsifiers) into the pipeline system for transporting borehole products, and can used in field preparation of well products.

State of the art

An automatic device for dispensing reagents is known (RF patent No. 93495, class IPC F17D 3/12, publication date 04/27/2010, consisting of a flow meter installed on the pipeline that is electrically connected to the controller, a metering pump that doses the reagent to the pipeline, electrically connected with a controller, a pressure sensor installed on the pipeline, electrically connected to the controller, while an electrochemical sensor is installed on the pipeline, electrically connected to the controller. The algorithm is based on determining the properties of water and selecting the required consumption of a corrosion inhibitor, while determining the properties of oil, and therefore the surface interfacial tension at the oil-water interface, is not included in this algorithm, therefore, the technology cannot be used to supply a demulsifier in the field preparation of oil and produced water.

A device for dispensing a reagent into a pipeline is known (RF patent No. 170785, class IPC F17D 3/12, published date 05/11/2017), consisting of a meter installed on the pipeline, electrically connected to the controller, a metering pump equipped with inlet and outlet hoses, dosing the reagent into a pipeline electrically connected to the controller, and an electrochemical sensor is installed on the pipeline after the reagent entry point, which is electrically connected to the controller. The disadvantage of this technology is that it cannot be used to supply a demulsifier in the field preparation of oil and produced water.

A device for automatic dosing of liquid reagents (options) is known (application No. 2016144622 for an invention, class IPC G01G 17/00, publication date 05/17/2018), including a supply tank, strain gauge, dosing device and control system. At least one measuring tank is installed as a metering device, equipped with a strain gauge and a liquid reagent supply line, on which the metering pump and nozzle are located, and the supply and measuring tanks are connected by pressure equalization and periodic liquid reagent supply lines. The disadvantage of this device is the lack of automated control of the specific consumption of the reagent using an algorithm that is based on the physical processes of demulsification of the production well.

An automated device for dispensing reagents is known, the control unit of which is implemented on a remote Web server, the signals to which are sent from sensors included and not included in the device via the GPRS protocol of the GSM network via the Internet (RF patent No. 129627, class IPC G01F 11/16, publication date 06/27/2013), which includes a metering unit, which includes a container with a reagent, a metering pump with an electric motor, as well as flow sensors and / or other operating parameters of the device and a pump performance control unit, which zmenyaet her programmed algorithm, responsive to signals from external sensors by Audra control of production processes, which are intended to regulate reagent, and supervise the execution of its instructions on the signals coming from the flow sensor and other sensors that monitor the work of Audrey. The AUDR control unit is implemented on any computer connected to the Internet in the form of a Web server (also known as an HTTP server), the signals to which are sent from sensors included and not included in the Device via the GPRS protocol of the GSM network via the Internet. The disadvantage of this device is that this technology is described only from a technical point of view. The technology describes the possibility of adjusting the flow rate and automating the supply of the reagent using a remote Web server, the signals to which are sent from sensors included and not included in the Device via the GPRS protocol of the GSM network via the Internet. ” However, there is no description of the reagent supply algorithms that can be applied and used in various technological processes.

The closest in technical essence is a system for automatically controlling the supply of liquid chemical reagents to the product pipeline (RF patent 78516, publication date 27.11.2008, class IPC ЕВВ 37/06), including a metering pump with an electric motor, a tank with a chemical agent, a flowmeter with a unified electrical outlet, a hydraulic system that connects the metering pump through pipelines to a tank and a product pipeline. In order to control the flow rate of a liquid chemical reagent, a frequency controlled electric drive of a plunger metering pump was used. The speed of the electric motor depends on the instantaneous flow rate of the fluid passing through the flowmeter, and a hydrostatic pressure sensor (level gauge) is installed in the tank for the chemical reagent. A controller is connected to the electric circuit with the possibility of transmitting information via radio channel to the dispatcher’s console about the current flow rate of the pumped liquid and about the changing amount of chemical reagent in the tank. The disadvantage of this system is the lack of automated control of the specific consumption of the reagent.

Disclosure of the invention

The technical result of the installation of the dosing of the reagent in the pipeline is to reduce the consumption of reagent demulsifier in the preparation of well products by improving the accuracy of regulation of the specific consumption of the reagent.

The specified technical result is achieved in that the reagent dosing unit includes a reagent supply unit, made in the form of a container with a reagent, a level sensor, a measuring tube; a frequency converter coupled through an electric motor to a metering pump; downhole transportation pipeline passing through the oil metering unit; a pipeline connecting the tank with the reagent with a metering pump; the pipeline connecting the metering pump to the pipeline for transportation of downhole products, while the oil metering unit is configured to measure such parameters as fluid flow, density, temperature, pressure and water cut, while the reagent dosing unit includes a data transmission module configured to implement a determination algorithm the required reagent supply rate depending on the water cut of the product and equipped with a real-time wireless data acquisition and transmission system When using a GPRS modem, the downhole transportation pipeline passes through the heating unit and is hydraulically connected to the entrance to the settling unit, at the outlet of which a moisture meter is installed.

Brief Description of the Drawings

In FIG. 1 shows a diagram of a reagent dosing installation in a pipeline with well products.

The implementation of the invention

The reagent dosing installation in the pipeline includes a reagent supply unit 1, including a reagent tank 2, a measuring tube 3, a liquid level sensor 4; metering pump 7, hydraulically by pipeline 6, connected to the capacity 2 of the reagent supply unit 1, and at the outlet, hydraulically by pipeline 8 connected to the pipeline 5 for transportation of well products; a frequency converter 9 connected through an electric motor 10 by a metering pump 7; an oil metering unit 11, which is connected by a wireless channel 12 to the input of the data transmission module 13; a data transmission module 13 (for example, IVE-50 mod. 14.611G), the output of which is connected to the frequency converter 9 by a wireless channel 14, is equipped with a wireless system for collecting and transmitting data in real time to a remote operator’s workstation using a GPRS modem; a heating unit 15 and a block of sedimentation tanks 16 hydraulically connected to the pipeline 5 for transportation of downhole products; a moisture meter 17 installed at the output of the block of sedimentation tanks 16, connected by a wireless channel 18 to the input of the data transmission module 13.

Installation dosing of the reagent in the pipeline is as follows. The reagent is located in the tank 2 of the reagent supply unit 1. The presence of the reagent is determined using a measuring tube 3 and a liquid level sensor 4. The reagent is supplied from the tank 2 to the well production pipe 5 through a pipe 6 connecting the tank 2 to the metering pump 7, and then through the pipeline 8, the reagent is pumped by the metering pump 7 into the pipeline 5 for transportation of downhole products. The adjustment of the flow rate of the reagent and the performance of the metering pump 7 is carried out using a frequency converter 9 connected to an electric motor 10.

The volume of borehole products flowing through the internal pipeline transport system and pipeline 5 of the on-site oil production facility is measured at the oil metering unit 11. The measured parameters include: fluid flow rate, density, temperature, pressure, water cut. Information on these parameters of the well production flow online is recorded in an automated data processing system and, through an integration circuit, is sent via wireless channel 12 to data transmission module 13 (IVE-50 mod. 14.611G) to the processing level of the reagent supply algorithm. The algorithm processes the data on the actual parameters of the incoming product and calculates the required rate of reagent supply, while calculating the algorithm determines the viscosity of the liquid and the interfacial surface tension at the oil-water interface. The required reagent supply rate is determined on the basis of the condition of a sufficient size of water globules in the oil volume for effective demulsification, namely, depending on the water content of the products, the interfacial surface tension at the oil-water interface is calculated.

Depending on the water content of the transported well products, to supply the required amount of reagent, the received signal is sent from the data transmission module 13 via a wireless communication channel 14 to a frequency converter 9, which sets the required frequency of the electric motor 10, which regulates the operation of the metering pump 7 for supplying the reagent through pipeline 8 to the pipeline 5 transportation of downhole products. Further, through the pipeline 5, the borehole product passes through the heating unit 15 and enters the block of sedimentation tanks 16 for separation of the emulsion.

At the exit from the block of sedimentation tanks 16, a hygrometer 17 is installed, connected by a wireless channel 18 to the input of the data transmission module 13, to which data from the hygrometer 17 are received.

In case of violation of the technological process of preparation and exceeding a predetermined percentage of water at the outlet from the sumps 16, determined by a moisture meter 17, a signal is transmitted to the data transmission module 13 via wireless channel 18 for reprocessing it by the algorithm and adjusting the feed rate of the reagent into the pipeline 5 by adjusting the frequency operating mode a transducer 9 that sets the required frequency of the electric motor 10, and which in turn regulates the operation of the metering pump 7, which allows optimizing the flow of reagent-deem ligator.

As a result of pilot industrial tests of the reagent dosing control system for the transport pipeline carried out at the Unva UPSV LUKOIL-PERM LLC, the reagent consumption reduction without reducing the quality of the field production of well products amounted to 14.4%.

Claims (1)

Installation of dosing of the reagent in the pipeline, including the reagent supply unit, made in the form of a container with a reagent, level sensor, measuring tube; a frequency converter coupled through an electric motor to a metering pump; downhole transportation pipeline passing through the oil metering unit; a pipeline connecting the tank with the reagent with a metering pump; a pipeline connecting a metering pump to a pipeline for transporting downhole products, characterized in that the oil metering unit is configured to measure parameters such as fluid flow rate, density, temperature, pressure and water cut, and the installation comprises a data transmission module configured to implement a determination algorithm the required reagent supply rate depending on the water cut of the product, and equipped with a wireless system for collecting and transmitting data in real time using GPRS modem associated with the wireless node oil metering, frequency converter motor and the metering pump hygrometer installed on the sumps output unit.

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