新沟非常规油藏开发探索与实践

Exploration and Practice of Unconventional Reservoir Development in Xingou Oilfield

根据泥晶白云岩的油藏特征,对新沟油田新下Ⅱ油组非常规油藏制定了相应的开发策略:大面积实施老井试油复查评价油藏含油性、新钻探井滚动评价油藏含油面积的分布;水平井、大斜度井评价产能及建产;大规模压裂及水平井分段压裂-采用可钻桥塞和射孔联作工艺技术;经注水开发可行性论证,开展注水开发试验,并制定相应的动态监测方案辅助研究注水井组;同时以经济效益为中心,控制投资,实现降本增效开发。在对其开发方式不断的探索与实践中,新沟非常规油藏已形成年产油1.2×104 t的规模。

According to dolomicrite--bearing reservoir features, the development strategies for unconventional reservoir of Lower Xin2 in Xingou Oilfield have been adopted. The first is to evaluate oil--bearing characteristics of the reservoir by implementing large--sized maturing well testing for oil and evaluate the distribution of oil--bearing area through progressive exploration. The second is to evaluate capacity and production of horizontal wells and highly-- deviated wells. The third is to introduce the technology of drillable bridge plug and perforation combining operation. The fourth is to launch water--flooding development experiment and establish relevant dynamic monitoring program to assist the research on injection well group, and the last is to control investment to realize cost decreasing and benefit increasing.