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天然气与石油 NATURAL GAS AND OIL
2017年8月
致密油碎屑岩储层分类方法探讨中国石油西南油气田公司勘探开发研究院，四川成都610041
摘要：中国石油行业常规碎周岩储层分类是按孔隙度的倍数分类，面致窑油等非常规油气藏还没有一个统一的致密储层分类行业标准。一般来说，石油对于碎屑岩具有非润遥性，水对于辞屑岩具有润湿性，因此，油、水在致窑储层孔喉与外界间会产生毛细管压力，推动油、水的相互流动，流动量的大小与孔喉直径、毛细管压力高低以及浮力大小育较大关系，由此产生油饱和度和水饱和度随孔隙度起伏变化，在变化的拐点、极值点或突变点可作为致密油储层的分类界点。因此，把常规储层分类中的特低孔隙度特低渗透率储层作为致密储层重新调整分类界点，并进一步细分为流体束缚、毛细管和油水平衡三类致窑储层。
关键词：致密油；碎屑岩储层；分类标准；孔隙度；饱和度 DOI:10. 3969/ j. issn. 1006 5539. 2017. 04. 010
DiscussionontheClassificationMethodof
TightOil Clastic RockReservoirs
Jin Tao, Zou Juan, Zhou Chunlin, Chen Long, Le Yuan, Li Xiuqing, Li Yucong
Exploration and Development Research Institute of PetroChina Southwest Oil &
Gasfield Company, Chengdu, Sichuan, 610041, China
Abstract : The classification of conventional pyroclastic rocks in Chinese oil industry is often classified by the multiples of porosity. But unconventional oil and gas reservoirs, such as tight oil, have no uniform industry standard for tight reservoir classification. Generally speaking, oil has non-wettability and water has wettability for pyroclastie rocks. Therefore, oil and water will produce capillary pressure between the pore throat of tight reservoir and external environment which will promote oil and water flow. The flow rate is related to pore throat diameter, capllary pressure and buoyancy, which will cause the variation of oil and se pan aq ee od oe ro od aae od oaa sod ogees ae boundary point of tight oil reservoir classification. Thus, the tight oil reservoir in the Sichuan basin can be divided into three kinds of tight reservoirs :; fluid binding, capillary and oil-water balance.
Keywords : Tight oil; Pyroclastic rock reservoirs; Classification standard; Porosity ; Saturation
收稿日期：20170303
作者简介：金涛（1969－），男，四川自贡人，高级工程师，学士，主要从事测井及油气勘探综合研究。
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