双台阶水平井在塔里木盆地超深超薄边际油藏开发中的应用及效果评价

THE APPLICATION AND EFFECTIVENESS EVALUATION OF DOUBLE-STEP HORIZONTAL WELLS IN SUPER-DEEP AND SUPER-THIN MARGIN RESERVOIR OF TARIM

塔里木盆地哈得薄砂层油藏为双层、超深、超薄油藏,储量丰度特低,被评价为边际油藏。若采用常规方式开采,毫无经济效益,而利用双台水平井可大大增加泄油面积,可提高单井产量,实现“稀井高产”的开发效果。开发动态跟踪表明,双台阶水平井对全区稳定分布的深层双层层状边水油藏具有较好的适应性。

Tarim＇ s HaDe thin-sand reservoir which is named margin reservoir is a double-layer, superdeep, super-thin,particular-low-abundance reservoir. If we adopt normal methods to exploit, we can not have any economic benefit, but＇if we adopt double-step horizontal wells, it can increase drainable area greatly,enhance individual well producing rate, achieve the Tarim Oil field＇s exploiting rule of＂wide spacing, high production＂. According to the exploiting-dynamic-tracing research, double step horizontal wells have good adaptability for the stable distributed deep zone double layer banding margin reservoir of all the area, exploiting effect is very good, economic benefit is obvious. According specialists＇ appraise, the utilizing of the double-step horizontal wells in exploiting Tarim＇ s HaDe thin sand reservoir attained the technique standard of ＂international leading, domestic classic＂.