Abstract: This paper presents the geological design for horizontal drilling in a medium to thin-bed-ed heavy oil reservior in Le'an oilfield.The parameters for steam injection and productionwere optimized with numerical simulation.The actual production performance and effect ofhorizontal wells were analysed and evaluated,compared with that of the vertical wells,it hasbeen proved feasible to recover medium to thin-beded heavy oil reservoir by steam huff andpuff in horizontal wells with a fair economic benefit.

Key words: horizontal well, thin-beded, viscous crude, huff and puff, application

摘要： 论述了在乐安中-薄层稠油油层中钻水平井的地质设计方法,用数模手段研究、优选往采参数的结果,对水平井的实际生产动态、效果与直井进行了对比分析,并对经济效益进行了评价.实践证明,用水平井对乐安油田中-薄层稠油注蒸汽吞吐开采在技术上是可行的,经济效益也是好的.

关键词: 水平井, 薄层, 稠油, 蒸汽吞吐, 应用