定边采油区块采出水回注处理技术研究
发布时间：2019-03-06 21:17
【摘要】：目前,随着陕西延安石油天然气有限公司油气田开发工作的不断深入,已开发区块均存在不同程度多层系开发的问题。由于不同层位采出水组成性质差异较大,产出水混合后会发生离子之间的反应而结垢,堵塞油井及地面管线,造成集输管线堵塞、原油产量锐减,严重影响油田开发效果。为了解决好产出水的处理、回注等问题,并为后续污水处理工程建设提供技术支撑,本课题开展了定边采油区块采出水回注处理技术研究。首先为了了解延长油田污水处理现状,对杏子川采油厂已建采出水回注处理的主要工艺、运行状况进行了调研。然后,根据定边采油区块污水水质特性,以提高定边采油区块多层混合污水回注处理效果及腐蚀、结垢控制为目标,通过对定边长6和长9层混合采出水污水处理药剂体系研究,实现定边区块多层混合污水处理、防腐、阻垢技术的集成。结果表明:定边采出水中,长6层污水的悬浮物含量为23.08mg/L,含油量为0.8333mg/L,总铁含量为0.28mg/L,矿化度为26005.004mg/L;长9层污水的悬浮物含量为60.14mg/L、含油量为75.833mg/L,总铁含量为13.17mg/L,矿化度为7049.079mg/L。两种水以1:3的比例混合后,在调节污水p H值为7.5、氧化剂为Na Cl O、加药量为10mg/L、氧化时间为30min、无机絮凝剂为PAC、加药量为90mg/L、PAM的加药量为0.6mg/L、絮凝剂加药方式为先加PAC后加PAM、PAC与PAM的加药时间间隔为30s的条件下,处理后污水的悬浮物含量、含油量可降低到10.0mg/L以下,达到处理标准。最后,针对多层混合污水易发生结垢的性质,采用重量法探索新型装置的除垢性能。结果表明,在充填材料为海绵、流速为0.03m/s、反应温度为40℃、循环时间为15h的条件下,污水结垢量由原来的146.46mg/L降低到19.504mg/L。
[Abstract]:At present, with the development of oil and gas field in Yanan Oil and Gas Co., Ltd in Shaanxi Province, there are some problems in the development of multi-layer system in the developed area. Due to the great difference in the composition of produced water in different layers, the reaction between ions will occur when the produced water is mixed, which will clog the oil well and the surface pipeline, resulting in the blockage of the gathering pipeline and the sharp decrease of the crude oil output, which will seriously affect the development effect of the oil field. In order to solve the problems of water treatment and reinjection, and to provide technical support for the subsequent construction of sewage treatment project, the paper carried out the research on the reinjection treatment technology of produced water in Dingbian oil recovery block. In order to understand the present situation of waste water treatment in Yancheng oilfield, the main processes and operation conditions of reinjection treatment of produced water in Xingzichuan oil production plant have been investigated. Then, according to the characteristics of wastewater quality in Dingbian oil recovery block, the aim is to improve the treatment effect and corrosion of multi-layer mixed sewage in Dingbian oil recovery block, and to control the scaling. Through the study of the mixed produced water wastewater treatment agent system with 6 and 9 layers of fixed edge length, the integration of multi-layer mixed sewage treatment, anticorrosion and scale inhibition technology is realized in Dingbian block. The results showed that the suspended matter content, oil content, total iron content and salinity of Chang 6 layer wastewater were 23.08 mg / L, 0.833 3 mg / L, 0.28 mg / L and 26005.004 mg / L, respectively. The suspended matter content, oil content, total iron content and salinity of Chang-9 layer sewage are 60.14 mg / L, 75.833 mg / L, 13.17 mg / L and 7049.079 mg / L, respectively. When the two kinds of water were mixed at 1:3, the pH value was 7.5, the oxidizer was Na Cl O, dosage 10 mg / L, the oxidation time was 30 min, the inorganic flocculant was PAC, dosage 90 mg / L, the pH value was 7.5, the oxidizer was 10 mg / L, the oxidation time was 30 min, and the inorganic flocculant was PAC, dosage 90 mg / L. When the dosage of PAM was 0.6 mg / L, the dosage of flocculant was 0.6 mg / L, the dosage interval of PAM,PAC and PAM was 30 s, the content of suspended matter and oil content of the treated wastewater could be reduced to less than 10.0mg/L, when the time interval of adding PAM,PAC and PAM was 30 s, and the amount of oil in the treated wastewater could be reduced to less than 10.0mg/L. Meet the treatment standard. Finally, in view of the scale-forming property of multi-layer mixed sewage, the scale removal performance of the new device is explored by gravimetric method. The results show that under the condition that the filling material is sponge, the flow rate is 0.03mm2, the reaction temperature is 40 鈩，
本文编号：2435906
[Abstract]:At present, with the development of oil and gas field in Yanan Oil and Gas Co., Ltd in Shaanxi Province, there are some problems in the development of multi-layer system in the developed area. Due to the great difference in the composition of produced water in different layers, the reaction between ions will occur when the produced water is mixed, which will clog the oil well and the surface pipeline, resulting in the blockage of the gathering pipeline and the sharp decrease of the crude oil output, which will seriously affect the development effect of the oil field. In order to solve the problems of water treatment and reinjection, and to provide technical support for the subsequent construction of sewage treatment project, the paper carried out the research on the reinjection treatment technology of produced water in Dingbian oil recovery block. In order to understand the present situation of waste water treatment in Yancheng oilfield, the main processes and operation conditions of reinjection treatment of produced water in Xingzichuan oil production plant have been investigated. Then, according to the characteristics of wastewater quality in Dingbian oil recovery block, the aim is to improve the treatment effect and corrosion of multi-layer mixed sewage in Dingbian oil recovery block, and to control the scaling. Through the study of the mixed produced water wastewater treatment agent system with 6 and 9 layers of fixed edge length, the integration of multi-layer mixed sewage treatment, anticorrosion and scale inhibition technology is realized in Dingbian block. The results showed that the suspended matter content, oil content, total iron content and salinity of Chang 6 layer wastewater were 23.08 mg / L, 0.833 3 mg / L, 0.28 mg / L and 26005.004 mg / L, respectively. The suspended matter content, oil content, total iron content and salinity of Chang-9 layer sewage are 60.14 mg / L, 75.833 mg / L, 13.17 mg / L and 7049.079 mg / L, respectively. When the two kinds of water were mixed at 1:3, the pH value was 7.5, the oxidizer was Na Cl O, dosage 10 mg / L, the oxidation time was 30 min, the inorganic flocculant was PAC, dosage 90 mg / L, the pH value was 7.5, the oxidizer was 10 mg / L, the oxidation time was 30 min, and the inorganic flocculant was PAC, dosage 90 mg / L. When the dosage of PAM was 0.6 mg / L, the dosage of flocculant was 0.6 mg / L, the dosage interval of PAM,PAC and PAM was 30 s, the content of suspended matter and oil content of the treated wastewater could be reduced to less than 10.0mg/L, when the time interval of adding PAM,PAC and PAM was 30 s, and the amount of oil in the treated wastewater could be reduced to less than 10.0mg/L. Meet the treatment standard. Finally, in view of the scale-forming property of multi-layer mixed sewage, the scale removal performance of the new device is explored by gravimetric method. The results show that under the condition that the filling material is sponge, the flow rate is 0.03mm2, the reaction temperature is 40 鈩，
本文编号：2435906
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