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在对油水接触面形态和油水过渡带厚度的分布规律进行定量分析的基础上,以苏北盆地花17断块为例,结合油井生产动态特征分析了构造-岩性油藏中油水分布规律,并探讨了其影响因素。结果表明,在实际油藏中油水接触面是一个呈波状起伏的面,其在自由水面以上的高度随残余油饱和度下的毛管压力增大而抬高;油水过渡带厚度仅与束缚水饱和度和残余油饱和度下的毛管压力有关,二者相差越大,过渡带厚度越大;构造-岩性油藏产纯油带、油水过渡带的分布并非平行于构造等高线,油水分布除受构造位置控制外,还受由沉积作用所引起的岩性、物性和孔隙结构差异的影响。
Based on the quantitative analysis of the distribution pattern of oil-water contact surface and the thickness of oil-water transition zone, taking the block of Hu17 in the Northern Jiangsu Basin as an example, the oil and water distribution in structural-lithologic reservoirs was analyzed based on the dynamic characteristics of oil well production. And discusses its influencing factors. The results show that the contact surface of oil and water in a real reservoir is a wavy undulating surface whose height above free water surface increases with capillary pressure of residual oil saturation. The thickness of oil-water transitional zone is only saturated with irreducible water Degree and residual oil saturation capillary pressure, the greater the difference between the two, the greater the thickness of the transition zone; tectonic - lithologic reservoirs producing pure oil zone, the distribution of oil-water transition zone is not parallel to the tectonic contour line, oil and water distribution In addition to being controlled by the tectonic position, it is also affected by the lithology, physical properties, and pore structure differences caused by sedimentation.