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首页> 外文期刊>Natural Gas Industry B >Recovery and treatment of fracturing flowback fluids in the Sulige Gasfield, Ordos Basin
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Recovery and treatment of fracturing flowback fluids in the Sulige Gasfield, Ordos Basin

机译：鄂尔多斯盆地苏里格气田压裂返排液的回收与处理

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Centralized and group well deployment and factory-like fracturing techniques are adopted for low-permeability tight sandstone reservoirs in the Sulige Gasfield, Ordos Basin, so as to realize its efficient and economic development. However, environmental protection is faced with grim situations because fluid delivery rises abruptly on site in a short time due to centralized fracturing of the well group. Based on the characteristics of gas testing after fracturing in this gas field, a fracturing flowback fluid recovery and treatment method suitable for the Sulige Gasfield has been developed with the landform features of this area taken into account. Firstly, a high-efficiency well-to-well fracturing flowback fluid recovery and reutilization technique was developed with multi-effect surfactant polymer recoverable fracturing fluid system as the core, and in virtue of this technique, the treatment efficiency of conventional guar gum fracturing fluid system is increased. Secondly, for recovering and treating the end fluids on the well sites, a fine fracturing flowback fluid recovery and treatment technique has been worked out with “coagulation and precipitation, filtration and disinfection, and sludge dewatering” as the main part. Owing to the application of this method, the on-site water resource utilization ratio has been increased and environmental protection pressure concerned with fracturing operation has been relieved. In 2014, field tests were performed in 62 wells of 10 well groups, with 32980?m3 cumulative treated flowback fluid, 17160?m3 reutilization volume and reutilization ratio over 70%. Obviously, remarkable social and economical benefits are thus realized.
机译：鄂尔多斯盆地苏里格气田低渗透致密砂岩油藏采用集中式，群井布放和工厂式压裂技术，实现了高效，经济的发展。但是，由于井组的集中压裂，在短时间内现场输液量突然增加，环境保护面临严峻的形势。根据在该气田压裂后的天然气测试特征，考虑到该地区的地貌特征，开发了一种适用于苏里格气田的压裂返排液的处理方法。首先，以多效表面活性剂聚合物可回收压裂液体系为核心，开发了一种高效的井间压裂返排液回收利用技术，并利用该技术提高了常规瓜尔胶压裂液的处理效率。系统增加了。其次，为了回收和处理井场中的末端流体，已经开发了一种以“凝结和沉淀，过滤和消毒以及污泥脱水”为主体的精细压裂返排流体回收和处理技术。由于该方法的应用，提高了现场水资源利用率，减轻了压裂作业的环保压力。 2014年，在10口井组的62口井中进行了现场测试，累计处理后的返排液为32980？m3，再利用量为17160？m3，再利用率超过70％。显然，由此实​​现了显着的社会和经济利益。

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