安丰油田开发后期挖潜技术

Technologies of tapping the potential at later development stage of Anfeng oilfield.

安丰油田 1987年投产以来 ,由于高含水及套损影响 ,油田长期处于低产、低效、高成本、半停产状态。 2 0 0 1年年产油量仅 0 .87× 10 4t,油、水井利用率仅 38.1%。近年来 ,通过深化地质认识及油藏工程研究 ,以老井开窗侧钻技术为导向 ,进一步落实了构造及储量 ,挖掘井间及构造高部位剩余油 ,同时应用水平井技术进一步提高了油藏最终采收率 ,新增原油生产能力 2× 10 4t。

Anfeng oilfield is in the state of low production, low efficiency, high cost and semishutdown due to high water cut and casing failure since putting into production in 1987. Yearly oil production in 2001 is only 0.87 ×10 4t. Utilization factor of oil and water wells is only 38.1%. In recent years, the structure and reserves are determined further using sidetrack drilling in old wells by deepened geological knowledge and reservoir engineering research. The remaining oil among wells and at high position of the structure is found out. Ultimate oil recovery of oil reservoir is improved using horizontal well technology with 2×10 4t of newly increased oil productivity.