辽河油田水平井化学堵水技术研究与应用

发布时间：2018-05-08 19:39

  本文选题：水平井 + 堵水　； 参考：《东北石油大学》2015年硕士论文

【摘要】：水平井开发技术作为复杂油藏开发中一项重要技术,如今被广泛应用于国内外各大油田,但由于缺乏行之有效的堵水技术,导致众多水平井在出现恶性产水问题后被迫带病生产、间歇生产或关停,这已成为一个困扰水平井正常生产和可持续开发的迫切问题。本文针对辽河油田水平井出水特点及油藏条件,设计了三种水平井用堵剂体系,对堵剂的影响因素、适应条件和封堵性能进行了系统评价,得出结论如下:(1)LH-Ⅱ型液体桥塞堵剂是利用液体桥塞的暂堵、保护作用,实现水平井段脚跟部位堵水,耐温性可达180℃,突破压力梯度可达9.65MPa/m,200℃以上完全破胶;(2)环空封隔材料借助水平井化学注入工艺管柱,在筛管与井壁之间形成化学封隔层的封隔材料,达到隔离环空区域的目的,成胶后耐温能达280℃,蒸汽条件下分解渗透率恢复率在90%以上;(3)二次交联深部调堵剂体系主要用于地层深部封堵,降低区块汽窜影响程度,成胶强度在10000m Pa2s以上,封堵率在92%以上;(4)通过统计分析辽河水平井出水特点和部位,结合堵水剂类型,设计出液体桥塞、管外环空封隔两种堵水工艺,并开展了现场试验,取了良好的增油降水效果,为辽河油田水平井稳油控水提供了技术保障。
[Abstract]:Horizontal well development technology, as an important technology in complex reservoir development, is widely used in various oil fields at home and abroad. However, due to the lack of effective water shutoff technology, As a result, many horizontal wells are forced to produce with disease, intermittent production or shutdown after the occurrence of malignant water production, which has become an urgent problem that puzzles the normal production and sustainable development of horizontal wells. According to the characteristics of horizontal well water and reservoir conditions in Liaohe Oilfield, three kinds of plugging agent systems for horizontal wells are designed in this paper. The influencing factors, adaptive conditions and plugging performance of plugging agents are systematically evaluated. The conclusions are as follows: the liquid bridge plug plugging agent type 1: 1 / 1 is a temporary plugging and protective effect of liquid bridge plug, and the water shutoff at heel of horizontal well can be realized, and the temperature tolerance can reach 180 鈩，

本文编号：1862804