鄂尔多斯盆地致密油资源潜力详解.docVIP

鄂尔多斯盆地致密油、页岩油特征及资源潜力 摘要：①致密块状砂岩储层；②砂岩-泥岩互层型储层；③油页岩型致密储层。鄂尔多斯盆地长6和长7油层组致密油分布广泛，初步预测致密油总资源量约30×108 t，其中长7油层组页岩油资源量超过10×108 t，长7油层组致密砂岩油资源量约9×108 t，长6油层组致密砂岩油资源量约11×108 t。致密油资源是长庆油田实现年产油气当量5000×104 t并长期稳产较为现实的石油接替资源。 关键词： 中图分类号：TE1.14 文献标识码：A Characteristics and resource prospects of tight oil and shale oil in Ordos BasinYang Hua1,2 Li Shixiang2,3 Liu Xianyang2,3 (1. PetroChina Changqing Oilfield Company, Xi’an 710018, China; 2. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Gas Fields, Xi’an 710018, China; 3. Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi’an 710018, China) Abstract: Changqing oilfield company has been realized efficient and scale development of the super low permeability reservoir which permeability is situated between 0.3mD and 1mD. Considering the petroleum exploration and development practice of Ordos Basin, the tight oil refers to air permeability of reservoir less than 0.3mD, and an oil that accumulates in oil shale and tight sandstones interbedded with or adjacent to source rocks. Generally, this oil accumulation has not yet experienced a large-scale, long-distance migration. The tight oil include tight sandstone oil reservoir and tight shale oil reservoir. The tight oil of Yanchang Formation is mainly developed in the half deep lacustrine to deep lacustrine zone, for the typical to oil shale and tight sandstone of Chang 7 interval, tight sandstone of the central lake of Chang 6 interval. Tight oil has characteristics of wide distribution, hydrocarbon source rock condition is superior, sandstone reservoir density, pore throat structure complexity, poor physical properties, high oil saturation, better oil property and low pressure coefficient. Nano-sized pore-throat system widely development is the fundamental characteristics of oil and gas continuous accumulation of tight oil. Most of the connected pore-throat diameter of tight sandstone reservoir o