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本文研究了油层微型构造对油井生产的控制作用。油层微型构造系指在油田总的构造背景上,油层本身的微细起伏变化,相对高差在10米以内、构造范围在0.3平方千米以内的小构造,包括正向微型构造如小高点、小鼻状凸起和小构造阶地等,为剩余油富集区;负向微型构造如小向斜和小沟槽等,为严重水淹区。直接以油层顶面(或底面)为准绘制小等高线间距(1—5米)构造图,可显示出微型构造特征。胜坨、孤岛油田实践证明,凡位于正向微型构造区的井生产好,负向微型构造区的井生产差。在制定调整方案时应充分考虑微型构造因素,即尽可能把加密井钻在正向构造区,负向构造区只能钻注水井,这对油田增产挖潜将取得良好效果。
This paper studies the control effect of oil layer micro structure on well production. Reservoir micro-structure refers to the overall structural background in the oil field, the oil layer itself changes in fine undulation, the relative elevation difference within 10 meters, the structure range of 0.3 square kilometers within the small structures, including the positive micro-structures such as small high point, small nose Shaped bumps and small structural terraces, which are the remaining oil-rich areas. Negative micro-structures such as small synclines and small trenches are severe flooded areas. Drawing directly on the top surface (or bottom surface) of the reservoir, the structure map of small contour spacing (1-5 m) can show the features of micro structure. Sheng Tuo, Gudao Oilfield has proved that where well is located in the positive micro-structure well production, negative micro-structural zone well production is poor. When formulating the adjustment plan, micro structural factors should be fully taken into account. That is, the infill wells should be drilled in the forward tectonic zone as much as possible and the negative tectonic zone only to drill the water well, which will have a good effect on increasing production and tapping the potential of the oil field.