长堤断裂带北部地区剩余油控制因素与挖潜对策

从油藏非均质性和开发非均质性两方面入手，对长堤断裂带北部地区宏观剩余油分布的控制因素进行了分析，并根据不同因素控制的剩余油分布模式提出了相应的挖潜措施：结果表明，剩余油的控制因素包括沉积模式、断层、微构造、原油性质、井网完善性及储量动用不均衡性等：对断裂带附近及断层边角处、油层有效厚度较大的正向微构造或河流相正韵律沉积厚油层的顶部等剩余油富集区，可采用特殊结构井挖潜：对井网不完善区，可实施补孔或打新井方式挖潜；对距原始油水界面较远且处于微构造高点的井，可选择提液带油的方式挖潜；对强水淹层剩余油，可采用堵水调剖、降粘等配套工艺措施挖潜。

Control factors of remaining oil distribution and potential exploitation measures in the northern part of Changdi fault belt

Taken the reservoir of the northern part of Changdi fault belt as an example, the control factors of remaining oil distribution were analyzed from reservoir heterogeneity and exploitation heterogeneity. And the potential exploitation measures were put forward according to the remaining oil distribution pattern controlled by different factors. The results show that control factors of remaining oil distribution including deposition model, fault, microstructure, fluid property, well pattern perfection and no equilibrium of reserves put to use. The special structure well can be adopted in the abundance remaining oil zones such as along the fault and the corner of fault, the positive microstructure with large effective thickness, the top of the positive rhythm and thick reservoir bed of fluvial facies. Reperforation or drilling a new well should be implemented in the zone with imperfect well pattern. The well, which is far away from the original oil water contact and located the high point of microstructure, is chosen to enhance the quantity of liquid to get more oil. The accessory technological measures such as Well plugging and injection profile adjustment, viscosity reduction are used for the strong waterlooded layer. The methods have reference to the remaining oil exploitation of the same kind reservoir.