摘要
原始含油饱和度是影响地质储量可靠性的重要因素之一.目前确定原始含油饱和度的方法主要有油基泥浆取心法、压汞法、测井解释和经验公式等四大类,其中油基泥浆取心是确定原始含油饱和度的第一手资料,也是用其它间接方法进行研究工作的基础和对比验证的依据.在用油基泥浆取心资料分析原始含油饱和度时,要充分考虑取心井所处油藏构造部位、储层特征及油水系统等多种因素的影响,并结合测井资料建立原始含油饱和度解释图版,对尽可能多的有效储层进行解释,最后采用有效孔隙体积权衡法选取油藏的平均原始含油饱和度值.
The initial oil saturation is one of the important factors that can affect the reliability of original oil in place. Currently, there are four methods to determine the oil saturation: oil_base sealing core drilling, mercury injection, log interpretation and empirical formulas. The oil_base sealing core drilling can provide the firsthand data of oil saturation, making a research base for the indirect methods and a basis for comparison and validation. When the oil_base core data is used, however, several factors should be taken into account, such as the well structure position in reservoir, the reservoir properties and the oil_water system. Furthermore, the equation of interpreting initial oil saturation should be built in combination with log information, and the most effective pays should be interpreted if possible. Finally, an average value of initial oil saturation can be picked up for the reservoir using the weighted method of effective pore volume.
出处
《中国海上油气（地质）》
2003年第4期252-255,共4页
China Offshore Oil and Gas(Geology)
