WO2020211734A1 - 一种适用于海上油田平台的水处理系统及其处理方法 - Google Patents

一种适用于海上油田平台的水处理系统及其处理方法 Download PDF

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WO2020211734A1
WO2020211734A1 PCT/CN2020/084586 CN2020084586W WO2020211734A1 WO 2020211734 A1 WO2020211734 A1 WO 2020211734A1 CN 2020084586 W CN2020084586 W CN 2020084586W WO 2020211734 A1 WO2020211734 A1 WO 2020211734A1
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water
oil
phase outlet
production
filter
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PCT/CN2020/084586
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English (en)
French (fr)
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杨强
代品一
刘懿谦
卢浩
孙盖南
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华东理工大学
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

Definitions

  • the invention relates to a process system for the treatment of offshore oilfield water, belonging to the field of environmental protection of oily sewage treatment. Breaking the era of traditional offshore oilfield water treatment technology: using high-efficiency deep coalescence degreaser to replace inclined plate degreaser and air flotation separator, and fiber ball filter to replace walnut shell filter, greatly increasing the processing capacity.
  • the traditional water treatment process of the traditional offshore oilfield platform is: produced crude oil liquid-production separator-inclined plate deoiler-air flotation separator-walnut shell filter-standard treatment. That is, the crude oil liquid with water, gas and other impurities extracted from the seabed is separated and processed from shallow to deep through four equipment: production separator, inclined plate deoiler, air flotation separator, and walnut shell filter.
  • production separator inclined plate deoiler
  • air flotation separator and walnut shell filter.
  • the purpose of the present invention is to overcome the shortcomings of the above-mentioned existing technology, apply high-efficiency deep coalescence degreasing technology, transform on the basis of the original production water treatment system, and form a new water treatment method to meet the needs of expansion on the basis of the original platform , Reduce the use of medicaments, and be more environmentally friendly, efficient and economical.
  • a water treatment system suitable for offshore oilfield platforms including a production separator, a pre-filter, a deep coalescing degreaser and a fiber ball filter;
  • the water phase outlet of the production separator is connected to the inlet of the pre-filter; the outlet of the pre-filter is connected to the inlet of the coalescing degreaser; the water outlet of the coalescing degreaser is connected to the inlet of the fiber ball filter;
  • the production separator is provided with two outlets, which are respectively a gas phase outlet and an oil phase outlet; the gas phase outlet is connected with the heat exchanger inlet; the oil phase outlet is connected with the dirty oil storage tank for collecting dirty oil;
  • the deep coalescing degreaser and the fiber ball filter are respectively provided with an oil phase outlet, which is connected to the dirty oil storage tank.
  • the deep coalescing degreaser adopts modified hydrophilic and hydrophobic fibers as internal parts, and uses the different intimacy of the fibers to oil and water to achieve two-phase separation of oil and water.
  • This method is a purely physical method and theoretically does not need to add any agents.
  • the use of chemicals can be reduced by 20% to 40%.
  • the fiber can adopt two methods: X weaving and ⁇ weaving.
  • the production separator can discharge the gas entrained in the bottom hole; reduce the oil content in the production water to 2000-4000 mg/L; and reduce the SS (suspended matter) content in the production water to 100-300 mg/L.
  • the accuracy of the pre-filter is determined by the content of solid particles or sludge in the effluent of the production separator.
  • the filter needs to ensure that the separation efficiency of solid particles above 100um is not less than 95%.
  • the SS content in the production water can be reduced to 50-80mg/L.
  • the deep coalescing deoiler can effectively treat the production water with an oil content of less than 4000 mg/L, and according to the principle of Stokes equation, the small oil droplets in the production water can be aggregated and grown into large oil droplets.
  • the internal sedimentation device achieves high-efficiency oil-water two-phase separation. Water enters the fiber ball filter from the water phase outlet, and its oil content can be controlled at 20-80mg/L; the separated oil is discharged into the slop oil storage tank through the oil phase outlet.
  • the application of a deep coalescing degreaser can reduce the retention time of the production liquid in the entire process system, and the processing volume within the same time increases, thereby improving the processing capacity.
  • the technical principle of the deep coalescing degreasing device is purely physical degreasing, which can reduce the dosage of the system by 20%-40%.
  • the deep coalescing degreaser does not need to add a pump in front of the equipment to provide transmission kinetic energy, and the energy required for the deep coalescing degreaser is provided by the production liquid at the outlet of the production separator.
  • the pressure drop before and after the deep coalescing degreaser is not more than 0.1Mpa; a differential pressure gauge must be installed on the inlet and outlet pipelines.
  • the differential pressure gauge is linked to control the outlet valve of the device. Carry out differential pressure overload protection to control the maximum instantaneous differential pressure not to exceed 1.1-1.3Mpa.
  • the oil content of the water phase outlet can be controlled at about 6-15 mg/L; the solid content of the water phase outlet can be controlled at about 10-15 mg/L.
  • the invention is based on the original traditional offshore oilfield water treatment process, using a deep coalescing degreaser to replace the inclined plate degreaser and air flotation separator, and a fiber ball filter to replace the walnut shell filter, on the premise that the platform space resources remain unchanged , Reduce the operating cost of the entire system and improve the processing capacity.
  • the present invention also provides a water treatment system treatment method suitable for offshore oilfield platforms, including the following steps:
  • the oil content in the production water is reduced to 2000-4000mg/L; the SS (suspended matter) content in the production water is reduced to 100-300mg/L; the pre-filter ensures that the separation efficiency of solid particles above 100um is not lower 95%, can reduce the SS content in the production water to 50 ⁇ 80mg/L; the deep coalescing deoiler can effectively treat the production water with oil content below 4000mg/L, after the equipment is processed, the oil content of the water phase outlet can be controlled At 20 ⁇ 80mg/L; the oil content of the water phase outlet of the fiber ball filter can be controlled at about 6 ⁇ 15mg/L; the solid content at the water phase outlet can be controlled at about 10 ⁇ 15mg/L.
  • the water treatment method of the present invention can treat the produced water produced at the bottom of the well to reach the national offshore oil platform production water discharge standard. It can be effectively applied to offshore oil development and meet the requirements of offshore platform expansion, installation, construction and production maintenance.
  • the deep coalescing degreaser in the present invention has the characteristics of small equipment volume, short retention time, long replacement period, and convenient maintenance and backwashing. It is especially suitable for offshore platforms with low oil content at the bottom of the well that need to be expanded to ensure production.
  • Figure 1 is a schematic diagram of the process flow of an offshore platform production water treatment method using a vertical deep coalescing degreaser.
  • Fig. 2 is a schematic flow diagram of a water treatment method for offshore platforms using a horizontal deep coalescing degreaser.
  • V-01 is a production separator
  • V-02 is a pre-filter
  • V-03 is a deep coalescing degreaser
  • V-04 is a fiber ball filter
  • P1 is a dirty oil transfer booster pump
  • P2 is a production water Transmission booster pump
  • V1 ⁇ V9 are valves.
  • the water treatment method and system of the present invention are used in a certain offshore oilfield production water treatment that needs to be expanded.
  • Fig. 1 it is a schematic flow diagram of an offshore platform production water treatment method using a vertical deep coalescing degreaser.
  • the offshore platform production water treatment system includes V-01 production separator, V-02 pre-filter, V-03 deep coalescing degreaser, V-04 fiber ball filter, P1 dirty oil transfer booster pump, P2 Production of water transfer booster pumps, V1 ⁇ V9 valves.
  • the bottom-hole production liquid passes through the valve V1 and then enters the production separator V-01.
  • the separated gas is discharged through the gas phase outlet through the valve V2 to the heat exchanger outside the system for heat exchange; the dirty oil passes through the oil phase outlet and then passes through the dirty oil.
  • the transmission booster pump P1 and the valve V3 are discharged to the oil storage tank for collection; the separated production water enters the pre-filter V-02 from the water phase outlet through the valve V4. After the pre-filter V-02, the suspended solids in the production water are further removed.
  • the de-suspended production water passes through the valve V5 and then enters the deep coalescing degreaser V-03.
  • the oil content in the production water is reduced to 2000-4000mg/L; the SS (suspended matter) content in the production water is reduced to 100-300mg/L; the pre-filter ensures that the separation efficiency of solid particles above 100um is not lower 95%, can reduce the SS content in the production water to 50 ⁇ 80mg/L; the deep coalescing deoiler can effectively treat the production water with oil content below 4000mg/L, after the equipment is processed, the oil content of the water phase outlet can be controlled At 20 ⁇ 80mg/L; the oil content of the water phase outlet of the fiber ball filter can be controlled at about 6 ⁇ 15mg/L; the solid content at the water phase outlet can be controlled at about 10 ⁇ 15mg/L.
  • the average oil content of the external drainage in the running test is 10 mg/L, and the average solid content is 11 mg/L. It can not only meet the expansion requirements of offshore platforms, but also fully meet the national offshore oil platform production water discharge standards.
  • FIG. 2 it is a schematic flow diagram of a water treatment method for offshore platforms using a horizontal deep coalescing degreaser. The rest is as in Example 1.
  • the system uses a high-efficiency deep coalescence degreasing device to replace the inclined plate degreasing device and air floatation separator; it uses a fiber ball filter to replace the walnut shell filter; the process system remains unchanged in space resources In this case, the processing capacity is 1.3 to 1.8 times that of the traditional method. While ensuring that the production water meets the discharge standards, it has the advantages of small space requirements, stable separation performance, large operating flexibility, and low operating costs, which can meet the current needs for expansion of offshore platforms.

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Removal Of Floating Material (AREA)
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Abstract

本发明涉及一种海上油田生产水处理工艺升级改造的工艺系统。是一种适用于海上油田平台的水处理系统，包括生产分离器、前置过滤器、深度聚结除油器和纤维球过滤器；所述生产分离器水相出口与前置过滤器入口相连通；前置过滤器出口与聚结除油器入口相连通；聚结除油器水相出口与纤维球过滤器入口相连通；所述生产分离器设有两个出口，分别为气相出口和油相出口；气相出口与热交换器入口相连；油相出口与收集污油的污油储油罐相连通；所述深度聚结除油器和纤维球过滤器分别设有一油相出口，该油相出口连通污油储存罐。本发明在空间资源不变情况下，处理能力为传统方法的1.3～1.8倍。

Description

一种适用于海上油田平台的水处理系统及其处理方法 技术领域
本发明涉及一种海上油田水处理的工艺系统，属于油类污水处理的环保领域。打破传统海上油田水处理工艺的时代：用高效深度聚结除油器替代斜板除油器和气浮分离器，用纤维球过滤器替代核桃壳过滤器，大大增加处理能力。
背景技术
传统的海上油田平台传统水处理工艺为：采出原油液-生产分离器-斜板除油器-气浮分离器-核桃壳过滤器-达标处理。即从海底采出的含水、气以及其它杂质的原油液体，经过生产分离器、斜板除油器、气浮分离器、核桃壳过滤器这四种设备进行由浅到深层次的分离处理，在得到粗品石油的同时使生产水的油含量达到相对应的环保标准，而后进行处理。
随着经济的飞速发展，作为工业血液的石油，其需求量日益增加。同时，随着海底石油的开采，石油储量减少，从海底采出的原液中石油比例逐年减少，为保证石油产量以供社会的发展，海上油田则需要扩容，增加采出量。与此同时，生产水处理就要面临严峻挑战。增加生产水的处理能力是平台能否扩容成功的关键。
在传统生产水处理工艺中，各部分设备体积大、占地面积广，在原有平台空间的基础上，无法做到扩容生产；且为保证生产水的油含量达标，需要在来液中加入一定量的破乳剂、絮凝剂等化学药剂，对海洋生态环境造成一定的影响。
发明内容
本发明的目的是克服上述现有技术的不足，运用高效深度聚结除油技术，在原有生产水处理系统基础上改造，形成一个新的水处理方法，以满足在原有平台基础上扩容的需求，减少药剂的使用，更加环保、高效、经济。
本发明的具体技术方案如下：
一种适用于海上油田平台的水处理系统，包括生产分离器、前置过滤器、 深度聚结除油器和纤维球过滤器；
生产分离器水相出口与前置过滤器入口相连通；前置过滤器出口与聚结除油器入口相连通；聚结除油器水相出口与纤维球过滤器入口相连通；
所述生产分离器设有两个出口，分别为气相出口和油相出口；气相出口与热交换器入口相连；油相出口与收集污油的污油储油罐相连通；
所述深度聚结除油器和纤维球过滤器分别设有一油相出口，该油相出口连通污油储存罐。
进一步的，所述深度聚结除油器采用改性亲疏水纤维作为内件，利用纤维对油和水的亲密度不同，从而达到油和水的两相分离。该方法为纯物理方法，理论上不需要添加任何药剂。在现有平台生产水处理技术基础上，可减少20％～40％药剂使用量。同时，依据接触角的不同，所述纤维可采用X编织和Ω编制两种方式。
进一步的，生产分离器能够排出井底来液夹带的气体；将生产水中的油含量降低到2000～4000mg/L；将生产水中的SS(悬浮物)含量降低到100～300mg/L。
进一步的，所述前置过滤器的精度由生产分离器的出水中固体颗粒或油泥的含量而定。所述过滤器需保证对100um以上固体颗粒的分离效率不低于95％。可将生产水中的SS含量降低到50～80mg/L。
进一步的，所述深度聚结除油器能够有效处理含油量在4000mg/L以下的生产水，依据斯托克斯方程原理使生产水中的小油滴聚并长大成为大油滴，通过设备内部沉降装置达到高效油水两相分离。水从水相出口进入纤维球过滤器，其含油量可控制在20～80mg/L；分离出来的油通过油相出口排进污油储存罐。应用深度聚结除油器可减少生产来液在整个工艺系统中的滞留时间，相同时间内处理量增加，从而提高处理能力。深度聚结除油器技术原理为纯物理方法除油，可降低系统20％～40％的药剂使用量。深度聚结除油器无需在设备前面增加泵来提供传输动能，深度聚结除油器所需能量由生产分离器出口生产液提供。在正常工况下，深度聚结除油器前后压降不大于0.1Mpa；其进出口管路上需设置差压计，所述差压计联动控制该装置出口阀门，对深度聚结除油器进行差压过载保护，控制最大瞬时差压不超过1.1～1.3Mpa。
进一步的，生产水经过所述纤维球过滤器，水相出口含油量可控制在6～15mg/L左右；水相出口含固量可控制在10～15mg/L左右。
本发明是在原传统海上油田水处理工艺基础上，用深度聚结除油器替代斜板除油器和气浮分离器，用纤维球过滤器替代核桃壳过滤器，在平台空间资源不变的前提下，降低整个系统的运行成本，提升处理能力。
本发明还提供了一种适用于海上油田平台的水处理系统处理方法，包括如下步骤：
1)井底生产来液通过阀门V1后进入生产分离器V-01，分离出的气体通过气相出口经过阀门V2排到系统外的热交换器进行换热处理；
2)污油通过油相出口后经污油传输增压泵P1、阀门V3排到储油罐中收集；分离后的生产水从水相出口经阀门V4进入到前置过滤器V-02中；
3)经过前置过滤器V-02，进一步除去生产水中的悬浮物；
4)除悬后的生产水通过阀门V5后进入到深度聚结除油器V-03中，在深度聚结除油器V-03中，完成小油滴的聚并、长大，深度油水两项分离；
5)分离后的油相经过阀门V6排到储油罐中收集；
6)分离后的水相经过阀门V7进入到纤维球过滤器；
7)经过纤维球过滤器对油水两项再次分离，油相通过阀门V8排到储油罐中收集；
8)水相经过生产水传输增压泵P2加压后，通过阀门V9排放。
经过生产分离器的生产水中油含量降低到2000～4000mg/L；生产水中的SS(悬浮物)含量降低到100～300mg/L；前置过滤器保证对100um以上固体颗粒的分离效率不低于95％，可将生产水中的SS含量降低到50～80mg/L；深度聚结除油器能够有效处理含油量在4000mg/L以下的生产水，经过设备处理后，水相出口含油量可控制在20～80mg/L；纤维球过滤器水相出口含油量可控制在6～15mg/L左右；水相出口固含量可控制在10～15mg/L左右。
本发明所述水处理方法能够将井底采出生产水处理达到国家海油平台生产水排放标准。能有效的适用于海洋石油开发,满足海上平台扩容、安装、建造及生产维护的要求。本发明中所述深度聚结除油器具有设备体积小、滞留时间短、更换周期长、维护反洗方便的特点。特别适用于井底油含量较低，为保证生产需要扩容的的海上平台。
附图说明
图1为采用立式深度聚结除油器的海上平台生产水处理方法的流程示意图。
图2为采用卧式深度聚结除油器的海上平台生产水处理方法的流程示意图。
符号说明：
V-01为生产分离器；V-02为前置过滤器；V-03为深度聚结除油器；V-04为纤维球过滤器；P1为污油传输增压泵；P2为生产水传输增压泵；V1～V9为阀门。
具体实施方式
下面结合附图和实施例对本发明做进一步说明，但本发明并不局限于以下实施例。
实施例1
某一需要扩容的海上油田生产水处理中，采用了本发明的水处理方法和系统，如图1所示，是采用立式深度聚结除油器的海上平台生产水处理方法的流程示意图。该海上平台生产水处理系统包括V-01生产分离器、V-02前置过滤器、V-03深度聚结除油器、V-04纤维球过滤器、P1污油传输增压泵、P2生产水传输增压泵、V1～V9阀门。
井底生产来液通过阀门V1后进入生产分离器V-01，分离出的气体通过气相出口经过阀门V2排到系统外的热交换器进行换热处理；污油通过油相出口后经污油传输增压泵P1、阀门V3排到储油罐中收集；分离后的生产水从水相出口经阀门V4进入到前置过滤器V-02中。经过前置过滤器V-02，进一步除去生产水中的悬浮物。除悬后的生产水通过阀门V5后进入到深度聚结除油器V-03中，在深度聚结除油器V-03中，完成小油滴的聚并、长大，深度油水两项分离。分离后的油相经过阀门V6排到储油罐中收集；分离后的水相经过阀门V7进入到纤维球过滤器。经过纤维球过滤器对油水两项再次分离，油相通过阀门V8排到储油罐中收集；水相经过生产水传输增压泵P2加压后，通过阀门V9排放。
经过生产分离器的生产水中油含量降低到2000～4000mg/L；生产水中的SS(悬浮物)含量降低到100～300mg/L；前置过滤器保证对100um以上固体颗粒的分离效率不低于95％，可将生产水中的SS含量降低到50～80mg/L；深度聚结除油器能够有效处理含油量在4000mg/L以下的生产水，经过设备处理后，水相出口 含油量可控制在20～80mg/L；纤维球过滤器水相出口含油量可控制在6～15mg/L左右；水相出口固含量可控制在10～15mg/L左右。
采用本发明的海上平台生产水工艺系统后的运行测试效果如下表：
采样日期 第一个月 第二个月 第三个月
生产分离器水相出口平均油含量mg/L 2702 2641 2694
生产分离器水相出口平均固含量mg/L 171 169 174
前置过滤器出口平均固含量mg/L 62.6 54.3 60.5
深度聚结除油器水相出口平均油含量mg/L 53.0 48.7 47.9
纤维球过滤器水相出口平均油含量mg/L 12.1 8.5 9.0
纤维球过滤器水相出口平均固含量mg/L 11.2 10.7 10.9
通过表中数据可以看出，采用本发明的海上平台生产水工艺系统后，运行测试的外排水油含量平均在10mg/L，固含量平均在11mg/L。既能满足海上平台的扩容要求，由完全达到了国家海油平台生产水排放标准。
实施例2
如图2所示，是采用卧式深度聚结除油器的海上平台生产水处理方法的流程示意图。其余内容如实施例1。
该系统在原生产水处理工艺流程的基础上，利用高效深度聚结除油装置替代斜板除油器和气浮分离器；利用纤维球过滤器代替核桃壳过滤器；该工艺系统在空间资源不变情况下，处理能力为传统方法的1.3～1.8倍。在确保生产水达标排放的同时，具有空间需求小、分离性能稳定、操作弹性大、运行成本低等优点，能满足当前海上平台扩容需求。

Claims (9)

  1. 一种适用于海上油田平台的水处理系统，其特征在于，包括生产分离器、前置过滤器、深度聚结除油器和纤维球过滤器；
    所述生产分离器水相出口与前置过滤器入口相连通；前置过滤器出口与聚结除油器入口相连通；聚结除油器水相出口与纤维球过滤器入口相连通；
    所述生产分离器设有两个出口，分别为气相出口和油相出口；气相出口与热交换器入口相连；油相出口与收集污油的污油储油罐相连通；
    所述深度聚结除油器和纤维球过滤器分别设有一油相出口，该油相出口连通污油储存罐。
  2. 根据权利要求1所述的一种适用于海上油田平台的水处理系统，其特征在于，所述深度聚结除油器采用改性亲疏水纤维作为内件，所述纤维采用X编织或Ω编制方式。
  3. 根据权利要求1所述的一种适用于海上油田平台的水处理系统，其特征在于，所述生产分离器排出井底来液夹带的气体；将生产水中的油含量降低到2000～4000mg/L；将生产水中的悬浮物含量降低到100～300mg/L。
  4. 根据权利要求1所述的一种适用于海上油田平台的水处理系统，其特征在于，所述前置过滤器的精度由生产分离器的出水中固体颗粒或油泥的含量而定；所述过滤器需对100um以上固体颗粒的分离效率不低于95％；将生产水中悬浮物含量降低到50～80mg/L。
  5. 根据权利要求1所述的一种适用于海上油田平台的水处理系统，其特征在于，所述深度聚结除油器处理含油量在4000mg/L以下的生产水；水从水相出口进入纤维球过滤器，其含油量在20～80mg/L。
  6. 根据权利要求1所述的一种适用于海上油田平台的水处理系统，其特征在于，生产水经过所述纤维球过滤器，水相出口含油量在6～15mg/L左右；水相出口含固量在10～15mg/L。
  7. 一种适用于海上油田平台的水处理系统处理方法，包括如下步骤：
    1)井底生产来液通过阀门V1后进入生产分离器V-01，分离出的气体通过气相出口经过阀门V2排到系统外的热交换器进行换热处理；
    2)污油通过油相出口后经污油传输增压泵P1、阀门V3排到储油罐中收集；分 离后的生产水从水相出口经阀门V4进入到前置过滤器V-02中；
    3)经过前置过滤器V-02，进一步除去生产水中的悬浮物；
    4)除悬后的生产水通过阀门V5后进入到深度聚结除油器V-03中，在深度聚结除油器V-03中，完成小油滴的聚并、长大，深度油水两项分离；
    5)分离后的油相经过阀门V6排到储油罐中收集；
    6)分离后的水相经过阀门V7进入到纤维球过滤器；
    7)经过纤维球过滤器对油水两项再次分离，油相通过阀门V8排到储油罐中收集；
    8)水相经过生产水传输增压泵P2加压后，通过阀门V9排放。
  8. 根据权利要求7所述的一种适用于海上油田平台的水处理系统处理方法，其特征在于，经过生产分离器的生产水中油含量降低到2000～4000mg/L；生产水中的悬浮物含量降低到100～300mg/L；前置过滤器保证对100um以上固体颗粒的分离效率不低于95％，生产水中的悬浮物含量降低到50～80mg/L；深度聚结除油器能够有效处理含油量在4000mg/L以下的生产水。
  9. 根据权利要求7所述的一种适用于海上油田平台的水处理系统处理方法，其特征在于，经过水处理后，水相出口含油量在20～80mg/L；纤维球过滤器水相出口含油量在6～15mg/L左右；水相出口固含量在10～15mg/L左右。
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