Weh油田T_2k_1组储量分布与挖潜目标选择

Reserves distribution and target selection in T_2k_1 formation of Weh Oilfield

Weh油田T2k1组油藏为低渗透、难开发油藏。运用砂体微相分析方法,采用储量分布模型建立技术,达到了弄清新疆Weh油田T2k1组低渗难采油藏储量分布特征和下一步挖潜靶区选择的目的。结果表明:油水界面受构造、断裂、砂体展布、物性和成岩后生作用等多因素控制,为一不规则的倾斜面;储量分布与扇三角洲平原亚相的辫状水道微相分布具有较好的相关性;辫状水道微相是下一步扩边挖潜的有利目标。上述工作对低渗难采油藏剩余油分布预测具有指导意义。

Reservoirs in T_2k_1 formation of Weh Oilfield are low permeable and hard to recover.The distribution of these reservoirs and potential targets are made clear by using sand micro-facies analysis method and reserves distribution modeling.The result shows that the oil-water contact is controlled by the structure,fault,sand distribution,petrophysical property and diagenetic epigenesist and is an irregular dip plane;reserves distribution is well related to the distribution of braided channel micro-facies in the fan delta plain;the braided channel micro-facies is a favorable target of extension in next step.This study is helpful to prediction of residual oil distribution in low permeable and hard-torecover reservoirs.