曙光油田氮气泡沫调剖技术研究与应用

发布时间：2018-01-11 21:23

本文关键词：曙光油田氮气泡沫调剖技术研究与应用　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：曙光油田稠油油藏地质构造复杂,含有多套含油层系,纵向上共探明六套含油层系“馆陶、兴隆台、大凌河、莲花、杜家台、古潜山”。目前主要开发方式为注高温蒸汽吞吐。由于稠油油藏埋藏浅、胶结疏松和非均质性等特点导致开发过程中存在油层纵向动用程度低、吸汽不均的问题,严重时会出现井间汽窜,影响油藏的开发效果。据测试资料显示,现在地层压力系数尽为0.3左右,地层能量严重不足。本课题通过大量的室内实验优选出适合稠油蒸汽吞吐的发泡剂、凝胶、助排剂和氮气形成的调剖体系。该药剂体系主要是利用泡沫通过地层孔喉时产生的贾敏效应来实现调剖作用的,通过研究发现体系中加入凝胶还可以能提高泡沫在地层中的稳定性。流变性的实验结果表明该体系与常规凝胶相比,有更强的耐温性。氮气的加入对高周期生产的油井起到增能保压的作用。开展的3D填砂模型的模拟实验结果显示该调剖体系能够有效改善注入蒸汽的剖面。设计的耦合内外旋流泡沫发生器能提高气体与泡沫凝胶溶液的发泡效率。曙光油田开展的氮气泡沫凝胶调剖技术于2014年初进入现场试验,累积实施60井次,为改善稠油蒸汽吞吐开发效果找到一条新的有效途径。
[Abstract]:The geological structure of heavy oil reservoir in Shuguang Oilfield is complex and contains multiple oil-bearing series. Six sets of oil-bearing strata have been proved vertically "Guantao, Xinglongtai, Dalinghe, Lianhua, Dujiatai." At present, the main way of development is to inject high temperature steam huff and puff. Due to the characteristics of shallow buried heavy oil reservoir, loose cementation and heterogeneity, there is a low degree of vertical production in the development process. The problem of uneven absorption of steam, when serious, cross-well steam channeling will occur, which will affect the reservoir development. According to the test data, the formation pressure coefficient is about 0.3. The formation energy is seriously insufficient. Through a large number of laboratory experiments, the foaming agent, gel, which is suitable for heavy oil steam huff and puff is selected. A profile control system formed by a drainage aid and nitrogen, which mainly uses the Jamin effect when foam passes through the formation pore and throat to achieve profile control. It is found that the stability of foam in the formation can be improved by adding gel in the system, and the experimental results of rheological properties show that the system is compared with the conventional gel. The results of 3D sand filling model show that the profile control system can effectively improve the profile of steam injection. The coupling internal and external swirl foam generator can improve the foaming efficiency of gas and foam gel solution. The profile control technology of nitrogen foam gel developed in Shuguang Oilfield was put into field test on early 2014. A new effective way to improve the development effect of heavy oil steam huff and puff is found.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE345

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