Because the complexity of the geology, the exploitation faces many series difficulties including: incomplete hole pattern, difficulty in adjustment, fast increasing of water ratio, low degree of pressure level maintaining, large scope of natural degression.
由于油藏地质条件复杂，目前油田开发面临着局部井网不完善、调整难度大、含水上升速度加快、压力保持水平整体偏低、自然递减大等严峻的开发形势。
参考来源 - 宝浪油田宝北低渗透油藏水淹层识别及水淹规律研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N a decrease by stages 递减
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