Application of integrated treatment technology of oilfield produced water in Xinjiang Oilfield

doi:10.19965/j.cnki.iwt.2020-0923

Abstract

Abstract:

Based on the present situation, water quality characteristics and treatment requirements of produced water in Xinjiang Oilfield, an integrated treatment technology for oilfield produced water was developed for the crux of produced water treatment. The technology is successfully applied to the produced water treatment in Xinjiang Oilfield. The system had the advantage of high operating load, good treatment effect, less reagent consumption, small occupation area and the effluent quality up to standard. Based on the successful application of this technology, a new idea of produced water treatment in Xinjiang Oilfield is put forward.

Key words: produced water, flotation, dissolved air water

摘要：

基于新疆油田采出水处理现状、水质特性及处理要求，开发出油田采出水一体化处理技术，并获得成功应用。系统运行负荷高、处理效果好、药剂消耗少、占地面积小，出水水质达标。基于此技术的成功应用，为新疆油田采出水处理提供了新思路。

关键词: 采出水, 气浮, 溶气水

CLC Number:

TE357.6

Cite this article

Yuanpeng Li,Peng Qu,Lina Hou,Tao Chen,Taotao Sun. Application of integrated treatment technology of oilfield produced water in Xinjiang Oilfield[J]. Industrial Water Treatment, 2021, 41(7): 144-147.

李远朋,曲鹏,侯丽娜,陈涛,孙涛涛. 油田采出水一体化处理工艺在新疆油田的应用[J]. 工业水处理, 2021, 41(7): 144-147.

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URL: https://gyscl.magtechjournal.com/EN/10.19965/j.cnki.iwt.2020-0923

https://gyscl.magtechjournal.com/EN/Y2021/V41/I7/144

Figures/Tables 12

Fig.1 Process flow of produced water treatment in Xinjiang Oilfiled

Fig.2 Process flow of integrated treatment of produced water

Fig.3 Process flow of microbubble dissolved gas water

Fig.4 Diagram of the internal structure of cyclone air floatation tank

Fig.5 Diagram of the internal structure of box-type air flotation tank

Table 1 Technical parameters of main equipment

项目	处理量/(m³·h^-1)	容器规格	表面负荷/(m³·m^-2·h^-1)
旋流气浮	10	D0.7 m×2 m	26
箱式气浮	10	3 m×1 m×1.2 m	—
双介质过滤器	10	D1.1 m×2 m	—

项目	滤速/(m·h^-1)	水力停留时间/min	反冲洗强度/(L·s^-1·m^-2)
旋流气浮	—	5.15	—
箱式气浮	—	14.4	—
双介质过滤器	15.73	—	3.93

Table 1 Technical parameters of main equipment

项目	处理量/(m³·h^-1)	容器规格	表面负荷/(m³·m^-2·h^-1)
旋流气浮	10	D0.7 m×2 m	26
箱式气浮	10	3 m×1 m×1.2 m	—
双介质过滤器	10	D1.1 m×2 m	—

项目	滤速/(m·h^-1)	水力停留时间/min	反冲洗强度/(L·s^-1·m^-2)
旋流气浮	—	5.15	—
箱式气浮	—	14.4	—
双介质过滤器	15.73	—	3.93

Fig.6 Equipment layout

Table 2 Main equipment weight

项目	数量/台	单台干重/t	单台湿重/t
立式气浮	1	1.2	2.0
箱体气浮	1	1.9	4.3
双介质过滤器	2	2.8	5.0
加药装置	3	0.6	1.0
控制柜	1	0.3	0.3
橇架	1	2.3	2.3
橇块总重		13.3	22.2

Table 2 Main equipment weight

项目	数量/台	单台干重/t	单台湿重/t
立式气浮	1	1.2	2.0
箱体气浮	1	1.9	4.3
双介质过滤器	2	2.8	5.0
加药装置	3	0.6	1.0
控制柜	1	0.3	0.3
橇架	1	2.3	2.3
橇块总重		13.3	22.2

Table 3 Water quality of produced water from produced water treatment station in a gas field in Xinjiang

项目	油/(mg·L^-1)	悬浮固体量/(mg·L^-1)	pH	矿化度/(mg·L^-1)
数值	500~1200	300~1 000	7.85	35 736
项目	原油密度/(g·cm^-3)	污水密度/(g·cm^-3)	温度/℃
数值	0.82~0.85	1.005	45

Table 3 Water quality of produced water from produced water treatment station in a gas field in Xinjiang

项目	油/(mg·L^-1)	悬浮固体量/(mg·L^-1)	pH	矿化度/(mg·L^-1)
数值	500~1200	300~1 000	7.85	35 736
项目	原油密度/(g·cm^-3)	污水密度/(g·cm^-3)	温度/℃
数值	0.82~0.85	1.005	45

Fig.7 Degreasing effect of integrated equipment

Fig.8 Suspended solid removal effect of integrated equipment

Table 4 Performance evaluation

项目	某油田采出水站	一体化处理设备
处理量	5 000 m³/d	5 000 m³/d
处理工艺	700 m³重力除油罐—200 m³缓冲罐—提升泵—150 m³反应罐—700 m³斜板除油罐—200 m³缓冲罐—提升泵—一级核桃壳过滤器—回注	2×11.5 m³旋流气浮罐—2×36 m³箱式气浮—提升泵—一级双介质过滤器—回注
药剂投加量	PAC 650 mg/L，PAM 10 mg/L	PAC 50 mg/L，PAM 1 mg/L
运行成本	1.99元/ m³	0.62元/ m³

Table 4 Performance evaluation

项目	某油田采出水站	一体化处理设备
处理量	5 000 m³/d	5 000 m³/d
处理工艺	700 m³重力除油罐—200 m³缓冲罐—提升泵—150 m³反应罐—700 m³斜板除油罐—200 m³缓冲罐—提升泵—一级核桃壳过滤器—回注	2×11.5 m³旋流气浮罐—2×36 m³箱式气浮—提升泵—一级双介质过滤器—回注
药剂投加量	PAC 650 mg/L，PAM 10 mg/L	PAC 50 mg/L，PAM 1 mg/L
运行成本	1.99元/ m³	0.62元/ m³

References 3

1	王吉福, 胡豫吉, 徐绮涵. 塔中I号气田采出水就地分离回注应用实践[J]. 石油石化节能, 2020, 10 (1): 21- 23. URL
2	付蕾, 蔡新峰, 洪波, 王爱军, 杨萍萍. 新疆油田采出水处理运行现状分析及改进建议[J]. 中国给水排水, 2013, 29 (8): 29- 33. URL
3	气田水回注方法SY/T 6596-2004[S].

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