Development of green technology for produced fluids reinjection in offshore low permeability oilfield

doi:10.11894/iwt.2020-0184

Abstract

Abstract:

The development of green, energy-saving, environment-friendly and safe key technology for wastewater treatment and reuse in offshore low-permeability oilfield with membrane technology was of great significance for improving the level of oil production technology in China. The designed and developed process technology was mainly composed of sedimentation, hydrocyclone, air flotation, medium filter and inorganic ultrafiltration membrane filtration, and the produced-water quality of the system met the requirements of A2 grade and even higher in SY/T 5329-2012 standard. The practical application showed that the oil content, the suspended solid and the median particle size of the production water reached 5 mg/L, 1 mg/L, and 1 μm, respectively.

Key words: low permeability oil field, oil-water separation, green technology, inorganic ultrafiltration membrane

摘要：

以膜技术为核心的绿色、节能、环保、安全的海上低渗油田污水处理回用关键工艺技术的开发，对提升我国采油技术水平具有重要意义。设计开发的由沉降、水力旋流、气浮、介质滤器及无机超滤膜过滤等工序耦合的工艺技术，其产水水质满足SY/T 5329—2012中A2及以上要求。实际应用表明，工艺产水的油质量浓度可达5 mg/L，悬浮固体为1 mg/L，粒径中值为1 μm。

关键词: 低渗油田, 油水分离, 绿色工艺, 无机超滤膜

CLC Number:

TE348

Likun Zhou,Houkai Teng,Qingfeng Ge,Zijing Chen,Bin Hu,Peng Gao,Aimin Chen. Development of green technology for produced fluids reinjection in offshore low permeability oilfield[J]. Industrial Water Treatment, 2021, 41(2): 108-112.

周立坤,滕厚开,葛庆峰,陈子婧,胡斌,高鹏,陈爱民. 海上低渗油田采出液回注绿色工艺技术开发[J]. 工业水处理, 2021, 41(2): 108-112.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2020-0184

https://www.iwt.cn/EN/Y2021/V41/I2/108

Figures/Tables 4

References 18

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项目	各工序产出水指标
项目	沉降罐	水力旋流器	立式旋流气浮器	介质过滤器	无机膜过滤器
含油质量浓度/（mg·L^-1）	≤1 000	≤100	≤45	≤15	≤6
悬浮固体/（mg·L^-1）	≥100	≤50	≤30	≤10	≤2
粒径中值/μm	-	-	-	≤4	≤1.5

项目	各工序产出水指标
项目	沉降罐	水力旋流器	立式旋流气浮器	介质过滤器	无机膜过滤器
含油质量浓度/（mg·L^-1）	≤1 000	≤100	≤45	≤15	≤6
悬浮固体/（mg·L^-1）	≥100	≤50	≤30	≤10	≤2
粒径中值/μm	-	-	-	≤4	≤1.5

主要设备名称	单台处理能力/（m³·h^-1）	储罐容积/m³	设计条件		设备数量
主要设备名称	单台处理能力/（m³·h^-1）	储罐容积/m³	压力（表压）/kPa	温度/℃	总数量	备用数量
沉降罐	-	200	1 150	115	1	0
水力旋流器	250	-	1 150	115	3	1
立式旋流气浮器	250	-	1 150	115	3	1
回注系统来液储罐	-	75	-2~35	115	1	0
介质过滤器	70	-	700	95	4	1
生产水换热器	200	-	1 000	115	2	1
膜进水缓冲罐	-	65	-2~35	90	1	0
无机超滤膜过滤装置	50	-	650	90	5	1
注水缓冲罐	-	20	-2~35	90	1	0
污油罐	-	40	-2~35	115	1	0

主要设备名称	单台处理能力/（m³·h^-1）	储罐容积/m³	设计条件		设备数量
主要设备名称	单台处理能力/（m³·h^-1）	储罐容积/m³	压力（表压）/kPa	温度/℃	总数量	备用数量
沉降罐	-	200	1 150	115	1	0
水力旋流器	250	-	1 150	115	3	1
立式旋流气浮器	250	-	1 150	115	3	1
回注系统来液储罐	-	75	-2~35	115	1	0
介质过滤器	70	-	700	95	4	1
生产水换热器	200	-	1 000	115	2	1
膜进水缓冲罐	-	65	-2~35	90	1	0
无机超滤膜过滤装置	50	-	650	90	5	1
注水缓冲罐	-	20	-2~35	90	1	0
污油罐	-	40	-2~35	115	1	0

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