【摘要】 塔中东部奥陶系缝洞型油气藏以溶洞、裂缝为主要储运空间,储层类型有洞穴型、裂缝孔洞型和孔洞型,储层非均质性较强,流体分布关系复杂。对塔中东部目前投产的51口见水井进行分析,将其见水特征分为间歇降低型、基本平稳型、台阶变化型和暴性水淹型。根据见水类型特征曲线,认为间歇降低型见水对产油量的影响较小,而暴性水淹型会使水体短时间内淹没井筒,对产油量的影响极大。该区域处于中含水阶段。更多还原

【Abstract】 Fractured vuggy type reservoirs in the eastern Tazhong area feature with the main reservoir spaces of cave and crack,and three types of reservoir can be subdivided into: cave-type,fractured-cavernous type,pore-caven. Taking 51 oil wells in the eastern Tazhong area as examples in this paper,the water breakthrough characteristics include four types: fluctuating curve,steady increasing curve,stepped increasing curve and rapidly increasing curve. On the basis of water breakthrough curve,rapidly increasing curve has a bigger effect than the others,because the water will be flooding borehole in a short time,while the fluctuating curve has the least impact. This indicates this area is in the middle of water breakthrough period.更多还原