论文部分内容阅读
基于大量钻井、测井、录井、试油及研究资料,结合岩心观察、薄片鉴定及物性分析等多项数据,运用最新非常规油气地质理论,通过综合研究陇东地区长7油层组储层特征、油藏形成条件和主控因素,认为陇东地区长7油藏属于“准连续型”致密砂岩油藏,受岩性特征、储层物性特征、沉积相特征和运移动力等因素影响,石油经短距离运移近源成藏.其长7致密砂岩油藏具有平面上呈条带状准连续分布、分布规模较大、储层致密、孔喉结构复杂等特征.下部泥页岩有机质丰度高、有机质类型好、厚度大,具有很强的生烃潜力,为该区优质的烃源岩,与大面积分布的厚层储集砂体垂向上叠置互层,对油藏的分布具有主要控制作用.陇东地区致密油资源潜力巨大,勘探前景很广阔.
Based on a great deal of data of drilling, well logging, logging, oil testing and research, combined with core observation, sheet identification and physical property analysis, and using the latest unconventional hydrocarbon geology theory, through comprehensive study on the reservoir of Chang 7 oil layer in Longdong area Characteristics, reservoir formation conditions and main controlling factors, it is considered that the Chang 7 reservoir belongs to the “quasi-continuous” tight sandstone reservoir and is affected by lithologic features, reservoir physical properties, sedimentary facies and migration motive force Due to the influence of factors, the petroleum migrated near source in a short distance, and the Chang 7 tight sandstone reservoir has the characteristics of a banded quasi-continuous distribution on the plane, a large distribution, compact reservoirs and complicated pore-throat structure. Shale has high abundance of organic matter, good organic matter type, large thickness and high potential for hydrocarbon generation. It is a high-quality source rock in this area and vertically overlaps with a large-area distributed thick sand body. The distribution of the reservoirs has the main controlling effect.The tight oil resources in Longdong area have great potential and the exploration prospect is very broad.