江汉盆地盐间页岩油油藏特征及开发对策

Characteristics of and Development Strategies for Intersalt Shale Reservoir in Jianghan Basin

江汉盆地盐间页岩油藏具有储层易结盐、堵塞,直井生产有效期短,累油量低等特点,开发效果较差。但该盐间页岩油藏以富碳纹层状泥质云岩相为主,具有较好的烃源、储集、含油性条件,储层具有强速敏、强应力敏,可以采用长水平段体积压裂、控速生产以及保持合理的生产压差等方法,多措并举,有效改善开发效果,为同类型油藏的开发提供借鉴。

The intersalt shale reservoir in Jianghan basin is characterized by easy salt formation and blockage,short production period of vertical wells and low accumulated oil,leading to poor development effect.But it,with rich carbon grain laminated shale lithofacies,has good conditions of hydrocarbon source,accumulation and oiliness.The reservoir has high speed sensitivity and strong stress sensitivity.Many methods can be used to effectively improve the development effect and serve as a reference for the development of similar reservoirs.The methods include using long horizontal section volume fracturing and controlling production speed and maintaining reasonable production pressure differential.