按照“油层下面找油层”的思路，江苏油田的勘探开发逐步向深层进军，苏北深层致密、特低渗油藏已逐步成为油田增储建产的重要领域。受复杂构造、沉积、裂缝等因素影响，苏北深层致密储层效益开发难度大。围绕苏北深层致密油藏储量有效动用进行了研究：“甜点”描述方面，针对苏北深层致密油藏特点，通过融合地质、物探、油藏、工程、经济等多学科的资料，形成了地质-地震一体化致密砂岩储层表征方法、多参数综合表征和评价方法，实现了致密储层的精准刻画，有效地指导了致密储层分类与“甜点”优选；体积压裂方面，通过采用提高压裂缝控体积、暂堵转向提高裂缝复杂程度、组合加砂提高裂缝充填体积等工艺，并结合区块储层特征开展针对性优化，初步形成了适合江苏深层致密储层特征的体积压裂改造技术；技术政策优化方面，通过开展井型、开发方式、压裂参数的优化和井网方案的迭代优选，保障致密油藏稳产；钻井高效提速配套方面，通过优化钻井工艺和布井方案，实现了提速降本、节约投资。研究成果有效指导了矿场试验，在X17、F125、Y48区块部署实施7口常规井和1口水平井。其中，常规井单井平均产油量超过6 t/d，水平井产油量稳定在10 t/d以上，实现了苏北深层致密油藏储量有效动用，研究方法和现场试验可以为其他致密油藏储量的开发提供技术参考和借鉴。

In line with the strategy of “finding oil layers beneath oil layers”, exploration and development in the Jiangsu Oilfield have progressively extended into deeper formations. Deep, tight, and ultra-low permeability reservoirs in northern Jiangsu have become key targets for reserve enhancement and production expansion. However, due to complex structural settings, sedimentary conditions, and natural fractures, the effective utilization of these reservoirs remains highly challenging. This study conducted research on the effective utilization of deep tight reserves in northern Jiangsu. For “sweet spot” characterization, an integrated geological-seismic approach was developed by synthesizing multidisciplinary data from geology, geophysics, reservoir engineering, engineering, and economics. A multi-parameter comprehensive characterization and evaluation methodology was established for tight sandstone reservoirs, accurate delineation of tight reservoirs and effectively guiding reservoir classification and “sweet spot” selection. For volume fracturing, engineering techniques were implemented such as increasing fracture-controlled volume, using temporary plugging and diversion to enhance fracture complexity, and employing combined proppant injection to increase fracture filling volume. These techniques were further optimized based on the characteristics of specific reservoir blocks, resulting in a preliminary volume fracturing technology tailored to the deep tight reservoirs of Jiangsu. To optimize development strategies, well types, production methods, fracturing parameters, and well pattern designs were systematically refined to ensure stable production. For more efficient and cost-effective drilling, improvements in drilling techniques and well placement schemes were introduced, achieving accelerated drilling speed and cost reductions. The study provided effective guidance for field implementation. A total of 7 conventional wells and 1 horizontal well were drilled in block X17, block F125, and block Y48. The average daily oil production per conventional well exceeded 6 tonnes, while the horizontal well maintained a stable daily output of over 10 tonnes. The results demonstrate the effective utilization of deep tight reserves in northern Jiangsu. The research methodology and field practices can provide technical references for the development of other tight oil resources.