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本文提出了研究聚驱后剩余油分布规律的新思路,即立足于对典型区块进行层内建筑结构解剖,对主力油层聚驱后剩余油再认识,从而进行聚驱后剩余油挖潜,实现由层间深入到层内,由层内深入到结构单元的跨跃,最大限度地挖潜聚驱后剩余储量。首先,明确了某区块主力油层后续水驱阶段平面上因废弃河道遮挡形成剩余油富集区;其次认清了该区域纵向因侧积夹层遮挡形成剩余油的原理和富集井区;确定了适合主力油层后续水驱阶段剩余油挖潜的长胶筒配套工艺;并且制定了长胶筒封堵挖潜的选井选层原则和标准。矿场实践证明长胶筒封堵是挖潜聚驱后剩余油的有效方法,可推广到前期控注控液的高关井治理和处于含水回升后期的其它注聚区块。
This paper presents a new way to study the distribution of remaining oil after polymer flooding. That is, based on the anatomical study of the typical building block structure and the re-understanding of the remaining oil after the polymer flooding, the remaining oil tapping potential is realized From the layers deep into the layer, from the layer deep into the structural unit of the leap to maximize the potential reserve after tapping potential accumulation. First of all, it is clear that the remaining oil-rich area is obstructed by abandoned river courses in the subsequent water-flooding stage of the main oil reservoirs in a certain block. Secondly, the principle of reserving residual oil longitudinally due to the lateral-intercalated interbeds and the enrichment well are identified. A suitable long rubber tank for the main oil reservoir water diversion stage tapping the length of the long rubber cylinder matching process; and developed a long plastic tube tapping potential of the well selection and selection criteria and standards. The practice proved that the long rubber tube blockage is an effective method for tapping the remaining oil after latent flooding. It can be extended to the high-shut-in well control of pre-charged control liquid and other agglomeration blocks in the late stage of water-bearing recovery.