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油砂山油田K4标准层附近为高阻、低渗的致密储层;K41标准层以下为生油岩部分,属于滨浅湖-半深湖沉积,高阻层段基本不含油,岩性为灰、深灰色钙质泥岩夹粉砂岩、泥质粉砂岩,储层特性差、含油级别低,在油田历次的储量复算过程中均未包含K41标准层以下高阻层段。2013-2014年油砂山油田加强对过渡段致密储层的研究和试采力度,采用过路老井恢复和产能建设相对结合的方法,一方面对过路套损老井进行上返层调,另一方面结合产能建设加深钻探,并结合压裂和酸化储层改造措施,证实该段致密储层具备一定生产能力。
Near the K4 standard layer in Yansha Mountain Oilfield is a high-resistivity and low-permeability tight reservoir. Below the K41 standard layer is a source rock component, belonging to shallow-lake-semi-deep lake sediments. The high-resistivity layer is basically oil-free and the lithology is gray , Dark gray calcareous mudstone with silt sandstone and muddy siltstone, poor reservoir characteristics and low oil level. No high-resistance layer section below K41 standard layer was included in the previous recalculation of the oilfield. 2013-2014 Yinshaoshan Oilfield to strengthen the transitional section of tight reservoirs and trial mining efforts, the use of old-fashioned recovery and production capacity of the relative combination of methods, on the one hand, the old set of high-rise overpass turtles, the other one In connection with the capacity building to deepen drilling, combined with fracturing and acidizing reservoir reconstruction measures, confirmed that the tight reservoir with a certain production capacity.