曙一区杜84块超稠油油藏增产技术对策研究

发布时间：2018-03-04 18:10

本文选题：超稠油　切入点：蒸汽吞吐　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：辽河油田曙一区杜84块超稠油油藏1976年发现,随着油田勘探开发的深入,各个阶段暴露出不同的开发矛盾。投产初期注汽压力高,易出砂;中期易引起较严重的井间干扰或汽窜,后期周期生产时间长、日产油峰值低,排水期长,汽窜加剧,平面矛盾、层间矛盾加剧,井下技术状况变差。超稠油单井日产水平不断降低。本文针对吞吐中后期的各种矛盾,立足超稠油油藏高效开发和超稠油油藏采收率提高,通过对研究区域地质体重新认识并结合蒸汽吞吐中后期存在的矛盾,摸清超稠油油藏蒸汽吞吐中后期的主要开发矛盾和单井日产量变化规律,采取适合超稠油油藏蒸汽吞吐阶段的组合式注汽,水平井挖潜及蒸汽吞吐后的SAGD方式转换等特色技术。现场实施,单井日产上升至8t/d,水平井日产达到直井单井日产的3倍,蒸汽吞吐和SAGD的最终采收率达到60%左右,最终实现油藏的高效开发。
[Abstract]:In 1976, the super heavy oil reservoir of Block du 84 in Shu-1 area of Liaohe Oilfield discovered that with the deepening of exploration and development of the oil field, different development contradictions were exposed in each stage, with high steam injection pressure and easy sand production at the early stage of production. It is easy to cause serious inter-well interference or steam channeling in the middle period, long production period in later period, low peak oil production per day, long drainage period, intensified steam channeling, plane contradiction and interlayer contradiction. The downhole technical condition has become worse and the daily production level of single well of super heavy oil has been decreasing continuously. In view of various contradictions in the middle and late period of huff and puff, this paper bases on the high efficiency development of super heavy oil reservoir and the improvement of oil recovery in super heavy oil reservoir. Based on a new understanding of the regional geological bodies studied and the contradictions existing in the middle and late stage of steam huff and puff, the main development contradictions and the variation law of daily production of single well in the middle and late stage of steam huff and puff in super heavy oil reservoir are found out. The combined steam injection technology suitable for steam huff and puff stage of super heavy oil reservoir, the tapping of horizontal well and the conversion of SAGD mode after steam huff and puff were adopted. The daily output of single well increased to 8 t / d and the daily output of horizontal well reached 3 times of that of single well in vertical well. The final recovery of steam huff and puff and SAGD is about 60%, and the reservoir is developed efficiently.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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