Oil treatment installation

FIELD: oil producing industry; installations for the fields oil treatment.

SUBSTANCE: the invention is pertaining to oil producing industry, in particular, to the installations for the fields oil treatment. The installation for the oil treatment includes: the oil pipeline, the first stage of the oil treatment with the end divider of the stages (EDS) and the tank of the water preliminary discharge connected with the treatment facilities by the water discharge pipeline; the second stage of the oil treatment with the pipeline of the withdrawal of the low-mineralized semi-commercial water, which is connected to the oil pipeline; the heat exchanger installed on the oil pipeline after the first stage. EDS is supplied with the water discharge pipeline, which is connected to the pipeline of the water discharge from the tank of the preliminary water discharge before the treatment facilities, and the pipeline of the withdrawal of the low-mineralized semi-commercial water is connected to the oil pipeline before the tank of the preliminary water discharge. The treatment facilities are additionally supplied with the oil withdrawal pipeline, which is also connected with the oil pipeline located before the tank of the preliminary discharge of the water. On the water discharge pipeline located before the treatment facilities and on the oil pipeline located between EDS and the preliminary water discharge tank correspondingly there are the first and second heat exchangers, which are accordingly and sequentially connected to the heat exchanger of the second stage. The technical result of the invention is cooling of the finished commercial oil to the temperature of 30°С before its transfer to the oil stock accounting site; the increased efficiency of operation of the preliminary water discharge tank up to the water share in the oil of no more than 0.5 %; the increased degree of treatment of the oil-field water, the reduced power input.

EFFECT: the invention ensures cooling of the finished commercial oil to the temperature of 30°С before its transfer to the oil stock accounting site; the increased efficiency of operation of the preliminary water discharge tank up to the water share in the oil of no more than half percent; the increased degree of treatment of the oil-field water; the reduced power input.

1 dwg

 

The proposal relates to the oil industry, in particular oil treatment plants in the fields.

Famous oil treatment unit, including the stage of preliminary water is the first step of preparing the oil, the degree of thermochemical dehydration and desalting of crude oil - second stage oil treatment, treatment facilities for preparation of brine water (Thrones VP Commercial oil preparation. - M.: Nedra, 1977, p.14).

The disadvantages of the known apparatus are not sufficiently high efficiency of its work, in particular the insufficient degree of demineralization, high consumption of fresh water, high temperature commercial oil at the outlet of the installation and prior to its delivery at the metering oil, inefficient tank preliminary water discharge, the lack of quality in the preparation of brine water, significant energy costs, instability in General.

The closest technical solution is the Installation of oil (see patent RU 2104739, IPC 6 01D 19/00, publ. BI No. 5 from 20.02.1998,), comprising the first step of preparation with the tank prior to water discharge, with the pipeline, and the second stage of the training pipeline output brackish produced water, as well as additional intermediate stage of the preparation containing the technology is ski storage tank, connected by pipeline with the tank preliminary water and pipeline output brackish produced water is connected to the pipeline before the process tank.

The disadvantages of this setup, especially in the preparation of heavy viscous oils, which require high temperatures for their preparation, are high temperature commercial oil at the outlet of the installation and prior to its delivery at the metering oil, inefficient tank preliminary water discharge, the lack of quality in the preparation of brine water, significant energy costs, instability in General.

The technical object of the present invention is to reduce the temperature of the crude oil at the outlet of the installation, the efficiency of the tank preliminary water discharge, the training quality of produced water, reduce energy costs.

The technical problem solved by the installation of oil, including the oil pipeline, the first stage of oil with an end divider phases (KDF) and the tank initial water connected to treatment facilities the water discharge pipeline, the second stage of the training pipeline output brackish produced water, which is connected to the pipeline, and HEA is om, installed on the pipeline after the first stage.

What's new is that KDF is equipped with a water discharge pipeline, which is connected to pipe water from the reservoir preliminary water before treatment facilities and pipeline output brackish produced water is connected to the pipeline before the tank preliminary water discharge and treatment facilities equipped with piping the output of oil, also connected to the pipeline before the tank prior to water discharge to water discharge pipeline before treatment facilities and the pipeline between the KDF and the tank initial water respectively set for the first and second heat exchangers, respectively, and which are connected with the heat exchanger of the second stage.

The drawing shows the installation diagram.

The installation includes the pipeline 1, the first, the second stage of oil processing and treatment facilities for preparation of brine water.

The first stage oil treatment contains the separator 2, KDV 3, line 4 water discharge from KDF 3, the second heat exchanger 5, the reservoir preliminary water 6, line 7 water discharge from the reservoir preliminary water 6.

The second stage oil treatment contains raw pump 8, Teploobmennik is to 9, the heater 10, the sludge dewatering oil 11, electrodesiccation 12, the pipeline output brackish produced water 13, the end separator 14, the reservoir tank oil 15, the pump tank oil 16 and provides for the filing of reagent-demulsifier III on the intake of raw pump 8 and the supply of fresh water IV at the entrance of the desalter 12.

Treatment facilities for preparation of brine water containing the first heat exchanger 17, sump cleaning water reservoir 18, a tank for preparation of brine water 19, o pipe for oil entrapped 20, the pump pumping the entrapped oil 21, the pump pumping water reservoir 22 and include the filing of reagent-corrosion inhibitor VI to receive a pump pumping water reservoir 22.

The device operates as follows.

Gazovtomatika products I with oilfield pipeline 1 into the separator 2, where the separation gas II. Degassed water-oil emulsion enters the leaf divider phases (KDF) 3, where is the cold reset free produced water pipeline water discharge 4. Partially dehydrated oil-water emulsion after KDF 3 passes the second heat exchanger 5 and enters the reservoir preliminary water discharge 6. In the second heat exchanger 5 is heated partially dehydrated oil-water emulsion due to the flow of a commodity is Efti, that improves the conditions of separation of produced water from oil in the reservoir preliminary water 6, and at the same time there is a final cooling of the crude product. Heating the partially dehydrated oil-water emulsion significantly increases the efficiency of the tank preliminary water 6, helps prevent breakdowns in his work and, consequently, improves the stability of the whole setup in General. Pipeline 4 water discharge from KDF 3 and line 7 water discharge from the reservoir preliminary water 6 are connected, and produced water total flow goes to the treatment plant. Pre-dehydrated oil from the reservoir preliminary water 6 pump 8 is supplied through the heat exchanger 9 in the heater 10. In the heat exchanger 9 is heated preliminarily dehydrated oil due to the flow of crude oil and at the same time is the initial cooling of the crude product. On reception of raw pump 8 is supplied to the reagent-demulsifier III. Pre-heated dehydrated oil after the heater element 10 enters the settling tank 11, where there is a deep dehydration of oil. Dehydrated oil from the settling tank 11 flows into electrodesiccation 12, at the entrance of which is served fresh water IV. In the desalter 12 under the action of electric fields and fresh in the water is deep desalting. The water separated in the sedimentation tank 11 and the desalter 12, the pipeline output brackish produced water 13 is fed to the input of the tank preliminary water discharge 6. Dehydrated and desalted oil after the desalter 12 is supplied to the cooling in the subsequently installed heat exchangers 9, 17, 5. In the heat exchanger 9, the oil is cooled by the air flow pre-dehydrated oil coming from the reservoir preliminary water 6 in the heater 10. In the first heat exchanger 17, the oil is cooled by the air flow produced water separated in the KDF 3 and the tank initial water 6. Final cooling of the oil takes place in the second heat exchanger 5 through the stream of partially dehydrated oil-water emulsion coming from KDF 3 in the tank preliminary water discharge 6. After cooling in the second heat exchanger 5, the oil comes into the tail separator 14, where the separation gas II. From the separator 14 commodity oil V, chilled to the required temperature (not more than 30° (C)enters into the commodity tank 15, where the pump 16 for metering tank oil (not shown). Produced water separated in the KDF 3 and the tank initial water 6, goes to the treatment plant for preparation of brine water. Produced water passes the first heat is obmennik 17, where is heated by flow of commodity and oil enters the sump 18 and then into the tank for preparation of brine water 19. Heating of the formation water in the first heat exchanger 17 significantly increases the degree of training in wastewater treatment plants. Captured oil from the settling tank 18 and tank preparation produced water 19 is pumped by pump 21 through the pipeline output captured oil 20 to the input of the tank preliminary water discharge 6. From the reservoir 19 prepared produced water VII pump 22, which is served reagent corrosion inhibitor VI, is pumped into the system to maintain reservoir pressure (not shown).

The proposed installation of oil has the following benefits: allows to achieve cooling of the finished commodity oil to a temperature of 30°before its delivery to the metering of oil; to increase the efficiency of the tank prior to water discharge to water content in the oil is not more than 0.5%; to improve the quality of preparation of produced water treatment facilities to the content of oil in water is not more than 60 mg/DM3mechanical impurities not more than 50 mg/DM3; reduce energy costs for heating oil due to the use of commercial heat oil in heat exchangers; to increase the stability of the entire unit as a whole.

The oil treatment unit, including the surrounding pipeline, the first step of preparation of oil with an end divider phases (KDF) and the tank initial water connected to treatment facilities the water discharge pipeline, the second stage of the training pipeline output brackish produced water, which is connected to the pipeline and heat exchanger installed on the pipeline after the first stage, characterized in that the KDF is equipped with a water discharge pipeline, which is connected to pipe water from the reservoir preliminary water before treatment facilities and pipeline output brackish produced water is connected to the pipeline before the tank preliminary water discharge and treatment facilities equipped with piping the output of oil, also connected to the pipeline before the tank prior to water discharge to water discharge pipeline before treatment facilities and the pipeline between the KDF and the tank initial water respectively set for the first and second heat exchangers, respectively, and which are connected with the heat exchanger of the second stage.



 

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