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针对埕岛油田海域海水悬浮物含量高,颗粒粒径小的特点和油层对注入海水的处理要求,结合工艺处理流程,研究了混凝剂和絮凝剂,有效地降低了过滤设备的处理负荷,提高了净化效果,将悬浮物含量每升几百毫克的海水综合处理后达到了埕岛油田注入水标准。 相似文献
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酒东油田注水井近井地带易堵塞,严重影响了该油田的采收率。为了研究酒东油田注水井堵塞原因,对其注入水主要水质指标进行了测试分析,并通过岩心驱替实验量化分析了注入水水质指标对岩心渗透率的损害程度。首先,采用单因素分析法开展了注入水矿化度、悬浮物含量、悬浮物粒径、含油量对岩心渗透率的损害率实验,然后根据单因素实验结果设计正交实验,通过正交实验研究了矿化度、悬浮物含量、悬浮物粒径、含油量协同作用对岩心渗透率的损害率,并对正交实验后的岩心进行扫描电镜分析,进一步明确了注入水对岩心的损害情况。由正交实验结果可知,悬浮物含量对岩心渗透率的损害程度最大,其次是悬浮物粒径和矿化度百分比,含油量对岩心渗透率的损害程度最小。当模拟注入水矿化度百分比90%、悬浮物含量8 mg/L、悬浮物粒径2 μm、含油量6 mg/L时,岩心的渗透率损害率最低。 相似文献
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渤海油田长期注入聚合物(注聚)导致注聚井堵塞,已严重影响了原油开采。为明确渤海油田X注聚井堵塞物组分及各组分的相互作用机理,利用同步热分析仪、扫描电子显微镜、马尔文粒度分析仪、电感耦合等离子质谱分析仪、流变仪等,对堵塞物组分及含量、微观形貌、油田水配伍性、无机垢或原油与聚合物的相互作用进行了研究。结果表明,该堵塞物主要为聚合物与无机垢、原油、黏土颗粒相互包裹形成的,聚合物是堵塞物的主要成分。渤海油田水质配伍性差,地层水、注入水混合易生成无机垢。无机垢晶会包裹聚合物链生长变大,导致聚合物胶束水力学直径增加。聚合物垢被原油包裹后形成难以被地层水溶胀的柔性物质,严重堵塞地层。图6表1参16 相似文献
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汪卫东 《油气地质与采收率》2013,20(6):61-64
硫酸盐还原菌引起的油田注水水质沿程恶化和聚合物溶液粘度下降已成为近年来影响油田开发的重要问
题。油井产出液、污水站来水、注水站出水及注水井井口的水样分析结果表明,硫酸盐还原菌主要是在地面流程中
增生,同一区块污水中硫酸盐还原菌的浓度基本稳定,随时间变化幅度不大,依靠杀菌剂控制硫酸盐还原菌的方法
只能起到暂时缓解的作用。对胜利油区44个污水站污水的含油量、悬浮物含量和硫酸盐还原菌浓度等指标进行系
统检测,并将检测数据进行相关性分析,结果表明,硫酸盐还原菌的浓度与污水中的含油量和悬浮物含量成正相
关,所以要控制硫酸盐还原菌的浓度,需要首先降低污水的含油量和悬浮物含量。据此,提出了开放回注污水的处
理系统、尽可能应用空气气浮工艺的技术思路,从降低污水的含油量和悬浮物含量来控制硫酸盐还原菌的危害,以
减少杀菌剂的使用。 相似文献
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悬浮物是油田注水的主要控制指标,超标则易堵塞注水井渗滤端面及渗流孔道,造成注水压力上升,注水量下降,降低油田的注水效果。利用岩矿分析手段对岐口17-2油田注水悬浮物进行剖析,并提出解决悬浮物含量超标的方法及解除其堵塞的控制措施。研究表明,清水、污水混合注入后,悬浮物质量浓度相比混合前增加1.8~5.1mg/L,原因主要是清水与污水不配伍,流程较脏。通过加入30mg/L的防垢剂95%ATMP,可抑制混合水样中Ca2+、Mg2+等结垢离子浓度的降低以及悬浮物含量的增加,在井口加装过滤器可进一步稳定注水水质。注水中悬浮物组分是以铁硫化合物为主的腐蚀产物和以硅铝元素为主的地层矿物,含少量以钙镁为主的碳酸盐垢,颗粒粒径主要集中在5~15μm之间。通过加强对含铁硫化合物的酸化力度,加大前置液盐酸的用量,可保证对地层堵塞物的深度溶解,改善注水效果。 相似文献
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采油过程中,酸化是油气井增产、注水井增注的主要措施。砂岩基质酸化和碳酸岩基质酸化都是在低于储层破裂压力的条件下向地层中注入酸液,溶解地层中的可溶物质,清除孔隙或裂缝中的堵塞物质,从而使油气井增产或注水井增注的一种工艺措施。本文着重讨论了砂岩酸化的设计计算方法,并由此建立一套基质酸化设计方法。 相似文献
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《Oil and Energy Trends》2008,33(5):6-7
This section summarizes downstream developments of the previous month. Exploration & Production are covered in 'Upstream Review'.
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
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