摘要
随着油田的开采,储层段的地层压力逐渐降低,若保持生产压差不变,必然会导致油井出砂,为了防止油井出砂而影响油田的产量,研究压力衰减对临界生产压差的影响就显得尤为重要。以岩石力学中岩石的破坏准则为基础,分析了影响临界生产压差的主要因素,建立了压力衰减后的临界生产压差计算模型,并结合油田的实例,计算了原始地层压力下的临界生产压差与压力衰减后的临界生产压差并绘制图表进行对比,从计算结果中可以看出,随着地层压力的逐渐衰减,临界生产压差逐渐变小,这符合油田的实际情况,从而为油田的实际生产决策提供指导。
With the exploitation of the oilfield, the formation pressure of in the reservoir reduced gradually. If the production pressure differential is kept steady, it must lead to sand production in the oil wells. In order to prevent oil wells producing sand, it is very important to research the influence of pressure attenuation on the critical production pressure differential. Based on the destructive criterion from the rock mechanics, the major factor of influence on the critical production pressure differential are analyzed, the computing model of the critical production pressure differential after pressure attenuation is established, and the same time, we combine with the actual example of oilfield and compute the critical production pressure differential of original formation pressure and the critical production pressure differential of after pressure attenuation, and protract chart to contrast their difference. From the calculative consequence we can see, with the formauion pressure attenuation, the critical production pressure differential reduced gradually, it was consonant with practical condition of the oilfield. As a result, it can offer the guidance for actual production of the oil field.
出处
《钻采工艺》
CAS
北大核心
2006年第3期40-41,共2页
Drilling & Production Technology
关键词
压力衰减
出砂
临界生产压差
pressure attenuation, sand production, critical producing pressure differential
