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英旺地区储层属于典型的低渗砂岩储层,油气富集规律复杂,通过岩心观察、测井资料、阴极发光和铸体薄片等分析化验方法对其沉积环境和沉积微相进行了研究。长2油层组为三角洲平原亚相沉积,主要由分流河道微相、天然堤微相、决口扇微相、泛滥平原微相组成;同时三个小层沉积微相的展布特征说明了沉积微相对油气富集的控制作用。沉积微相决定着砂体的成因,及砂体的几何形态,空间展布规律和内部特征,也是决定地下油水运动和富集规律的重要地质因素。
The reservoirs in Yingwang area are typical low-permeability sandstone reservoirs with complex hydrocarbon accumulation laws. The sedimentary environment and sedimentary microfacies of these reservoirs are studied by the methods of core observation, logging data, cathodoluminescence and cast thin films. The Chang 2 reservoir is deltaic subfacies sedimentary, mainly composed of distributary channel microfacies, natural dike facies, faulting fan microfacies and floodplain microfacies. The distribution characteristics of three small sedimentary microfacies indicate that sedimentary microfacies The relative control of hydrocarbon accumulation. Sedimentary microfacies determine the formation of sand body, and the geometry of sand body, spatial distribution and internal characteristics of the law, but also determine the underground oil-water movement and enrichment of the important geological factors.