Water treatment system applicable to offshore oilfield platform and treatment method of water treatment system

A water treatment system and offshore oilfield technology, applied in multi-stage water treatment, natural water body treatment, degassed water/sewage treatment, etc., can solve the problems of marine ecological environment impact, inability to expand production, and large footprint , to achieve the effect of reducing the residence time, improving the processing capacity, and improving the processing capacity

Inactive Publication Date: 2019-08-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the traditional production water treatment process, each part of the equipment is bulky and occupies a large area. On the basis of the original platform space, it is impossible to expand the production; and in order to ensure that the oil content of the production water meets the standard, it is necessary to add a certain amount of oil to the incoming liquid. A large amount of chemical agents such as demulsifiers and flocculants have a certain impact on the marine ecological environment

Method used

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  • Water treatment system applicable to offshore oilfield platform and treatment method of water treatment system
  • Water treatment system applicable to offshore oilfield platform and treatment method of water treatment system

Examples

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Effect test

Embodiment 1

[0034] The water treatment method and system of the present invention are adopted in the production water treatment of an offshore oil field that needs to be expanded, such as figure 1 As shown, it is a schematic flow chart of an offshore platform production water treatment method using a vertical deep coalescing degreaser. The production water treatment system of the offshore platform includes V-01 production separator, V-02 pre-filter, V-03 deep coalescing oil remover, V-04 fiber ball filter, P1 sewage oil transmission booster pump, P2 Production of water transmission booster pumps, V1 ~ V9 valves.

[0035] The bottom-hole production liquid enters the production separator V-01 after passing through the valve V1, and the separated gas is discharged to the heat exchanger outside the system through the gas phase outlet through the valve V2 for heat exchange treatment; the dirty oil passes through the oil phase outlet and then passes through the dirty oil The transmission boost...

Embodiment 2

[0041] Such as figure 2 As shown, it is a schematic flow chart of an offshore platform production water treatment method using a horizontal deep coalescence degreaser. All the other contents are as in Example 1.

[0042] On the basis of the original production water treatment process, the system uses a high-efficiency deep coalescence degreasing device to replace the inclined plate degreaser and air flotation separator; uses a fiber ball filter to replace the walnut shell filter; the space resources of the process system remain unchanged Under normal circumstances, the processing capacity is 1.3 to 1.8 times that of the traditional method. While ensuring that the production water is discharged up to the standard, it has the advantages of small space requirement, stable separation performance, large operating flexibility, and low operating cost, which can meet the current expansion needs of offshore platforms.

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Abstract

The invention relates to a process system adopting an upgraded and transformed water treatment process for offshore oilfield production, which is a water treatment system applicable to the offshore oilfield platform. The water treatment system comprises a production separator, a prefilter, a deep coalescence oil remover and fiber ball filter, wherein a water phase outlet of the production separator is communicated with an inlet of the prefilter; an outlet of the prefilter is communicated with an inlet of the coalescence oil remover; a water phase outlet of the coalescence oil remover is communicated with an inlet of the fiber ball filter; the production separator is provided with two outlets including a gas phase outlet and an oil phase outlet respectively; the gas phase outlet is connected with an inlet of a heat exchanger; the oil phase outlet is communicated with a sump oil storage tank for collecting sump oil; each of the deep coalescence oil remover and the fiber ball filter is provided with an oil phase outlet communicated with the sump oil storage tank. The treatment capacity of the water treatment system is 1.3-1.8 times that of traditional methods under the condition thatspace resources are unchanged.

Description

technical field [0001] The invention relates to a process system for offshore oilfield water treatment, which belongs to the environmental protection field of oily sewage treatment. Breaking the era of traditional offshore oilfield water treatment technology: replace inclined plate degreaser and air flotation separator with high-efficiency deep coalescing degreaser, replace walnut shell filter with fiber ball filter, greatly increase the processing capacity. Background technique [0002] The traditional water treatment process of the traditional offshore oilfield platform is: crude oil production - production separator - inclined plate degreaser - air flotation separator - walnut shell filter - standard treatment. That is, the crude oil liquid containing water, gas and other impurities produced from the seabed is separated from shallow to deep through four equipments: production separator, inclined plate degreaser, air flotation separator and walnut shell filter. While obta...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F1/40C02F103/36
CPCC02F1/001C02F1/20C02F1/40C02F9/00C02F2103/365C02F2301/08
Inventor 杨强代品一刘懿谦卢浩孙盖南
Owner EAST CHINA UNIV OF SCI & TECH
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