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海上油田由于开发井数少,采用大井距和多层合采的开发方式,具有生产井段长,储层物性、流体性质随深度变化大的特点,层间非均质性严重,在生产动态上反映层间干扰程度大.通过定量表征层间矛盾的因素计算层间干扰系数的大小,从而判断层间干扰程度的强弱.现场应用结果表明,该方法计算的层间干扰系数与实际测试的层间干扰系数极为接近. 相似文献
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基于层间均衡驱替的分层注水井层间合理配注方法 总被引:1,自引:0,他引:1
在长期的水驱过程中,受层间储层物性差异的影响,多层合采油藏层间动用状况差异大,层间矛盾突出。分层注水技术是改善特高含水期层间矛盾的有效方法,其成功的关键是根据各小层的储层物性和动用状况确定各层的配水量。为此,以层间均衡动用为目标,综合考虑储层物性和动用状况,利用Buckley-Leverett非活塞式水驱油理论,建立了注水井分层配水量的计算方法,并编制了计算程序。分析结果表明:层间配水量的差异受油层厚度、剩余油饱和度和调控时间等因素的综合影响;所计算的配水量在给定的调控时间内使各小层达到均衡驱替状态,能够满足分层注水井层间配注的要求。 相似文献
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桥口非均质复杂断块油田,层间非均质性强,层间干扰十分严重,水驱动差异大,Ⅰ类储层见效水淹后,Ⅱ、Ⅲ类储层水驱动用程度差,剩余油潜力大。结合油田地质特征及开发实际,精细地质基础研究和工艺技术研究,应用采油井堵水、注水井高压分注、增注技术,调整注水和产液结构,实现了层间产量接替,油田开发由Ⅰ类层向Ⅱ、Ⅲ类层转移,有效地改善了油田开发效果。 相似文献
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剩余油研究现状与发展趋势 总被引:16,自引:3,他引:13
冉启佑 《油气地质与采收率》2003,10(5):49-51
剩余油是对地下未采出原油的总称,它包括未被驱替剂波及到的未动油和滞留在储层中采不出的残余油两部分。目前国内外对剩余油的研究主要集中在三个方面,印剩余油分布特征研究、剩余油饱和度测量与监测技术研究、剩余油挖潜技术研究。结合项目研究成果及大量文献的基础上,对剩余油的研究现状及其发展趋势作了全面的总结。 相似文献
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Low-resistivity oil layers are often missed in logging interpretation because of their resistivity close to or below the resistivity of nearby water layers. Typical low-resistivity oil layers have been found in the past few years in the Putaohua reservoir of the Puao Oilfield in the south of the Daqing placanticline by detailed exploration. Based on a study of micro-geological causes of low-resistivity oil layers, the macro-geological controlling factors were analyzed through comprehensive research of regional depositional background, geological structure, and oil-water relations combined with core, water testing, well logging, and scanning electron microscopy data. The results showed that the formation and distribution of Putaohua low-resistivity oil layers in the Puao Oilfield were controlled by depositional environment, sedimentary facies, diagenesis, motive power of hydrocarbon accumulation, and acidity and alkalinity of reservoir liquid. The low-resistivity oil layers caused by high bound-water saturation were controlled by deposition and diagenesis, those caused by high free-water saturation were controlled by structural amplitude and motive power of hydrocarbon accumulation. Those caused by formation water with high salinity were controlled by the ancient saline water depositional environment and faulted structure and those caused by additional conductivity of shale were controlled by paleoclimate and acidity and alkalinity of reservoir liquid. Consideration of both micro-geological causes and macro-geological controlling factors is important in identifying low-resistivity oil layers. 相似文献
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王希贤 《油气地质与采收率》2021,28(2):135-142
墨西哥EBANO油田的油藏类型为裂缝-孔隙型灰岩油藏,裂缝是影响油井产能和含水率上升的重要因素.为了解决开发中存在的Ksf和Kan层裂缝连通性认识不清的问题,利用岩心、成像测井资料、钻探资料和PLT测试资料及地震相干体技术,对EBANO油田泥质灰岩和灰质泥岩薄互层中裂缝的发育机理、发育规律、影响因素及裂缝的连通性进行了... 相似文献
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通过对滨南油区注水现状的调查,发现存在的主要问题是水井套管损坏严重和部分水井欠注。文章全面地介绍了套管损坏井治理和攻欠增注工艺技术在现状的应用。 相似文献
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哈南油田属低渗透复杂断杂油田,储层物性差,油层总厚度虽然大,但储层多而且单层薄。由于粘土运移及蜡和胶质沥青质垢的生成,近年来油井产量逐年下降。因此决定在解除地层有机伤害和无机伤害的同时提高地层基质渗透率,采用有机解堵剂和深度基层酸化相结合的方法,提高油井产量,在内对酸液,添加剂进行了优选,确定采用有机和盐酸为前置酸,选择由分散剂,有机溶剂和破乳剂等组成的FAX-1油垢 洗剂,能将垢(除无机质外)完全,快速地溶解并不产生乳状液;采用廊坊分院压裂酸化中心的FAH缓蚀剂,开发了高性能的FAD综合添加剂,前置酸,后置酸和主体酸的性能评价结果表明,在80℃下静置48h后,无异常变化,动态腐蚀速率为6.23g/m^2.hm(80℃),表面张力为25.96mN/m;20min内完全破乳,先后进行了3口井的酸化,酸后表皮系降低,产油量明显提高。 相似文献