Staged fracturing horizontal well technology is an important means of improving tight reservoir development efficiency. Taking a typical tight oil block in the Oilfield A as the studied area, the vertical well–horizontal well joint arrangement pattern is adopted in this study. The energy supplementary development effects of multiple permeability scales, different arrangement spacing, and different media (H2O, CO2) are discussed through the numerical simulation method. Combined with the principles of petroleum technology economics, the economic evaluation model for staged fracturing horizontal wells in tight oil reservoir development is proposed, thereby determining the technical boundary and economic boundary of supplementary energy development with different media. Studies indicate that the technical boundary and economic boundary of water-flooding development in the Oilfield A are 0.4 and 0.8 mD, respectively, and the technical boundary and economic boundary of CO2-flooding development are 0.1 and 0.4 mD, respectively. This study provides theoretical support for field operation of Oilfield A and guidance for selection of development mode for tight oil reservoirs.

中文翻译：

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致密油藏分段压裂水平井补充能源开发边界

水平井分段压裂技术是提高致密油藏开发效率的重要手段。本研究以A油田典型致密油区块为研究区，采用垂直井-水平井联合布置方式。通过数值模拟方法探讨了多渗透尺度、不同排列间距、不同介质（H2O、CO2）的能量补充开发效果。结合石油技术经济学原理，提出致密油藏开发阶段压裂水平井经济评价模型，从而确定不同介质补充能源开发的技术边界和经济边界。研究表明，A油田注水开发技术边界和经济边界分别为0.4和0.8 mD，CO2驱开发技术边界和经济边界分别为0.1和0.4 mD。该研究为A油田的现场作业提供了理论支持，为致密油藏开发模式的选择提供了指导。