超稠油蒸汽辅助重力泄油与蒸汽驱联合开采技术研究

发布时间：2018-05-29 14:07

  本文选题：蒸汽辅助重力泄油 + 蒸汽驱　； 参考：《东北石油大学》2015年硕士论文

【摘要】：超稠油常规吞吐采收率低,为探索超稠油开发方式转换,进一步提高油藏采收率,2006年9月在曙一区杜84块开展了蒸汽吞吐辅助重力泄油(SAGD)先导试验。转入SAGD开发以来,部分井组始终没有达到方案设计指标,主要表现为产量低、油汽比低、储量动用状况差、注采井间汽窜频繁。通过油藏研究结合动态分析,认为以下两方面因素影响了SAGD的开发效果:一是兴Ⅵ组先导试验区内局部夹层较为发育,蒸汽不易上覆,夹层上方储量难动用。二是转SAGD前注汽井射孔井段区域采出状况差,蒸汽不易扩展,未形成蒸汽腔,泄油通道狭小,易发生汽窜。为改善SAGD井组生产效果,在广泛调研、精细研究、深刻论证的基础上,创新提出了重力泄油与蒸汽驱联合开采方式,所谓联合开采是指在同一区域、同一层位,在注汽直井与水平生产井之间以重力泄油为主,在注汽直井与生产直井之间以蒸汽驱为主的复合驱动,其目的是动用夹层上方储量;创新提出了由注汽直井连续注汽调整为间歇轮换注汽,其目的是抑制汽窜、促使蒸汽腔扩展,形成稳定的泄油井点。开展两项试验:一是在夹层发育的区域,注汽井夹层上下分别射孔、注汽,动用夹层上方储量,同时优选边部直井参与生产,与注汽井形成蒸汽驱开采,动用边部储量。二是针对蒸汽腔压力高,易与水平井汽窜的注汽井,采取轮换注汽,培养蒸汽腔,抑制汽窜。此项技术在杜84块兴Ⅵ组先导试验区实施,有效动用了兴Ⅵ组先导试验区夹层上方的储量,极大改善了兴Ⅵ组先导试验区的生产效果,全面达到方案设计指标,取得了较好的经济效益。
[Abstract]:The conventional huff and puff recovery of super heavy oil is low. In order to explore the conversion of development mode of super heavy oil and further improve oil recovery, steam huff and puff assisted gravity discharge pilot test was carried out in du 84 block of Shu 1 district in September 2006. Since the development of SAGD, some well groups have failed to reach the project design targets, mainly as follows: low production, low oil / gas ratio, poor reserve production and frequent steam channeling between injection and production wells. Through reservoir research and dynamic analysis, it is concluded that the following two factors affect the development effect of SAGD: one is that the local intercalation is relatively developed, the steam is not easy to overlay, and the reserves above the interlayer are difficult to be used. The second one is that the region of perforation section of steam injection well before SAGD transfer is poor, the steam is not easy to expand, the steam cavity is not formed, the oil discharge channel is narrow, and the steam channeling is easy to occur. In order to improve the production effect of SAGD well group, on the basis of extensive investigation, fine research and deep demonstration, the combined production mode of gravity drain and steam drive is innovated. In order to produce reserves above intercalation, gravity oil discharge is the main factor between vertical steam injection wells and horizontal production wells, and steam drive is the main driving force between steam injection and production straight wells. It is proposed to adjust continuous steam injection from steam injection straight well to intermittent rotation steam injection, the purpose of which is to restrain steam channeling, to promote the expansion of steam cavity and to form a stable well discharge point. Two tests were carried out: first, in the area where the intercalation developed, the steam injection wells were perforated separately, steam injection was injected up and down, and the reserves above the interlayers were produced. At the same time, the best side selection of straight wells was involved in production, and steam drive production was formed with steam injection wells, and the reserves of the producing side were produced. Secondly, for steam injection wells with high pressure of steam chamber and easy to steam channeling with horizontal wells, rotation steam injection is adopted to cultivate steam cavities and restrain steam channeling. This technology was implemented in the pilot test area of Xing鈪，

本文编号：1951152