疏松砂岩油藏乳化柴油体系封堵分流实验研究

摘要

针对渤海油田疏松砂岩油藏油层厚度大、非均质性严重、酸化后含水率上升的问题,开展了乳化柴油封堵分流能力实验研究.物理模拟实验表明,以油水体积比3:7制备的乳化柴油体系具有选择性封堵高渗透层,对低渗油层的封堵能力较弱.应用该体系后可有效将后续液体分流到低渗层,且对高渗水层的渗透率有较大幅度降低,而对低渗油相渗透率影响很小.与常规酸化解堵措施相结合,可起到均匀酸化与控水增产的目的.%Research on the technique of emulsified diesel temporary plugging and diversion capacity was carried out in this paper.The new technology attempted to improve acidizing effectin Bohai oilfields,which was unconsolidated sandstone reservoirs with thick oil layers,serious anisotropy and high water-cut after acidification.The physical model lab test indicated that the emulsion diesel system with oil-water ratio 3:7 had a good capacity of selectively plugging in high permeability layers and little plugging effect on the low permeability layers.This can lead following fluids steering to the lower permeability layer. Integrated with conventional acidizing treatments, the emulsion diesel system can also conduce to uniformly acidizing treatment,water control and stimulation.