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随着油田开发程度的不断增加,老油田综合含水逐步上升,甚至达到95%。各油田均进入二次三次开发阶段,注水驱开发是油田二次开发最常用手段。而油田采出水中含有大量SRB菌、各种悬浮物及乳化油等。这些菌类,尤其是SRB,TGB等菌类等对设备有腐蚀性。如果不进行处理,给回注水系统带来严重影响:甚至堵塞岩心、影响采收率。因此,控制回注用水的细菌含量作为一项重要指标要求列入到了控制指标中。在生产中,通过电解盐产生氯气进行污水杀菌,能够有效地降低污水中菌类,达到净化污水目的。
With the increasing degree of oilfield development, the comprehensive water cut of the old oilfields gradually increases to 95%. Each oil field has entered the second three times the development stage, flooding flood development is the most commonly used means of secondary development of the oil field. The oilfield produced water contains a large number of SRB bacteria, a variety of suspended solids and emulsified oil. These fungi, especially SRB, TGB and other bacteria are corrosive to the equipment. If left untreated, it can have a serious impact on the waterflooding system: it can block the core and affect the recovery rate. Therefore, controlling the amount of bacteria in the water used for reinjection as an important indicator of the need to be included in the control indicators. In production, through the electrolysis of chlorine gas production of sewage sterilization, can effectively reduce the bacteria in sewage to achieve the purpose of purifying sewage.