大庆油田南一区块多轮次调剖技术研究

发布时间：2018-06-29 09:50

本文选题：多轮次 + 调剖技术　；参考：《东北石油大学》2015年硕士论文

【摘要】：大多数国内油田的油层是陆相沉积储层,层间矛盾、层内矛盾和平面矛盾比较大。当油田进入注水开发期,注入水优先进入高渗透率大孔道,导致纵向上和平面上注入水的推进不均匀,使其提前突进入油井,导致油田提前进入水淹状态。多轮次调剖作为一种注水井调剖,是对油藏进行不同目的多轮次调剖,以改善油藏非均质状况。通过多轮次调剖,层间渗透性差别得到改善,进而实现使注水窜流情况得到有效调控、水驱波及系数得到提升、层间吸水情况得到调节。本课题以石油工业行业标准为依据,评价了调剖剂的性能;筛选调剖剂时,根据变换调剖剂影响调剖剂性能的因素诸如矿化度、温度、pH值等,来优选出最适用于大庆油田南一区块现场实际情况的调剖剂配方;应用了岩心实验,探究了针对岩心不同渗透率,调剖状况的差异,重点整体评估稳定性、抗温性,进而使调剖轮次得到改进、优化。最终结果显示,通过在恰当的时间采取多轮次调剖,并且适时地衔接各轮次调剖,可实现高含水期提高采油率、稳油控水的期望目标。
[Abstract]:In most domestic oil fields, the reservoir is continental sedimentary reservoir, interlayer contradiction, intra-layer contradiction and plane contradiction are relatively large. When the oil field enters the stage of water injection development, the injection water enters into the high permeability large pore channel first, which leads to the uneven propulsion of the injection water in the longitudinal and the plane, which makes the injection water burst into the oil well ahead of time, leading to the oil field entering the water flooded state ahead of schedule. As a kind of profile control in water injection wells, multi-turn profile control is used to improve reservoir heterogeneity. Through multiple rounds profile control, the difference of permeability between layers is improved, which can effectively regulate the water injection channeling, improve the sweep coefficient of water drive, and adjust the water absorption between layers. Based on the industry standard of petroleum industry, this paper evaluates the performance of profile control agent, and according to the factors such as salinity, temperature and pH value, when selecting profile control agent, according to the factors that influence profile control agent performance, such as salinity, temperature and pH value, etc. The formula of profile control agent, which is most suitable for the actual field situation in Nanyi block of Yu Daqing oilfield, is selected, and the core experiment is used to explore the difference of profile control condition according to the different permeability of core, and the emphasis is to evaluate the stability and temperature resistance of the core as a whole. Then the profile control cycle is improved and optimized. The final results show that the desired goal of improving oil production rate and stabilizing oil and water control can be achieved by adopting multiple rounds profile control at the right time and connecting each round profile control timely.
【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】：TE357.6

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