陕西靖边延长组长_2油层组成藏特征研究

研究陕西靖边地区延长组长2 油层组成藏的特征对指导油田开发和提高经济效益有直接作用 .对区内石油富集条件和油层“四性”关系的研究表明 :其油层的岩性、物性、电性与含油性有明显的相关关系 .区内局部隆起是石油的富集部位 ,其油藏规模为中—小型 ,其产油量较高、含水率亦较高 .区内油层“四性”关系的研究成果对指导油藏开发有重要意义 .

Study on the oil accumulating characteristics of Chang 2 oil-bearing sand bodies of Yanchang Formation, in Jingbian, Shaanxi

The oil accumulating conditions, relationships between oil bearing characters and lithologic, physical and electric properties, and reservoir characteristics of Chang 2 oil bearing sand bodies are studied. The study shows that there are better constructive delta plain facies and oil accumulating conditions in Chang 2 oil bearing sand formation. Many lithologic oil reservoirs are formed. There are obvious interrelationships between oil bearing characters and lithologic, physical and electric properties. The local uplifts in the area are the places of oil accumulating, the sizes of oil accumulating are small or medium. But their oil production is higher, and water cut is also higher.