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老君庙油田 L 油层综合含水已高达88.9%,预计含水98%时采收率可达到48%。利用岩心驱油效率与试油时的含水率作出的关系曲线进行测算,当含水98%时,水驱油效率可达57%以上。二者的差距主要原因是注入水波及体积造成,其影响因素主要是注水方式、水洗程度、油层平面和剖面上渗透车的组合及油层孔隙结构的不均匀性。为了提高 L 油层采收率,对高渗透层 L_3,拟通过单独井网开采、改变液流方向、加大排液量等手段提高水洗程度;对中低渗透层 L_(1、2),拟通过加密井网、增加注水井点、改善剖面吸水状况、提高注水量等办法扩大水驱体积。
Laojunmiao Oilfield L reservoir integrated water has been as high as 88.9%, the expected 98% water recovery of up to 48%. Using the relationship between the displacement efficiency of the core oil and the moisture content of the test oil, the water displacement efficiency can reach 57% when the water content is 98%. The main reason for the difference between the two is the influx of water and volume. The main influencing factors are the waterflooding method, washing degree, the combination of seepage vehicles on the reservoir plane and section, and the heterogeneity of the pore structure of the reservoir. In order to improve the oil recovery of L oil reservoir, it is proposed to increase the water washing degree by adjusting the direction of liquid flow and increasing the liquid discharge rate for the high permeable layer L_3. For the low permeability layer L_ (1,2) By enlarging the well pattern, increasing the injection well point, improving the water absorption in the profile and increasing the water injection, etc., the water flooding volume is expanded.