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濮城油田开发时间长,主体沙二下多油层中渗油藏含水上升、产量下降的开发趋势,从沙二下油藏的注水状况来看,一是贼层单层突进明显;二是一类层和二三类层的吸水层的平均吸水强度差距大于十倍以上;三是仍有47.5%层数和55.9%的厚度不吸水;四是上述认识是在开井分注率55.26%的基础上得出的,说明目前的分注工艺没有完全达到分层注水的目的。究竟是分层注水认识问题还是目前工艺达不到分层注水要求,需要一种比较客观的技术手段来进行认识和评价。
Pucheng oilfield development time is long, the main reservoir of sand two sub-reservoir oil reservoir water rise, production decline in the development trend, from the second sand reservoir water injection situation, one thief layer sudden jump obvious; second is a The difference between the average water absorption strength of the water absorption layer of the two or three kinds of layers is more than ten times or more; third, there is still 47.5% of the layers and the thickness of 55.9% is not absorbent; Fourth, the above understanding is that the open injection rate is 55.26% Based on the conclusion that the current dispensing process does not fully achieve the purpose of stratified water. Whether it is the problem of stratified waterflooding or the current technology can not meet the requirements of stratified waterflooding requires a more objective means of technology for understanding and evaluation.