鱼骨刺柔性管在碳酸盐岩缝洞型油藏应用的数值模拟研究

发布时间：2018-09-19 19:28

【摘要】：塔河油田碳酸盐岩缝洞型油藏水平井酸压投产时,存在笼统酸压效果不理想,分段酸压难度大、工具选择困难、裂缝走向难控制等问题,为此,采用数值模拟方法分析了碳酸盐岩缝洞型油藏水平井采用鱼骨刺柔性管完井时的增产效果及经济性。结果表明:鱼骨刺柔性管未连通有效缝洞体时,单井产油量随着鱼骨刺柔性管装置数量增加而增加,但是平均单套装置的增油量呈现先增加后减小的趋势,连通缝洞体概率较低的井建议采用6~10套鱼骨刺柔性管装置进行完井作业;连通单个有效缝洞体时,产油量随缝洞体的体积增大而增加;连通多个缝洞体且缝洞体总体积相同时,累计产油量随着连通缝洞体的数量增加而增大;连通1个以上缝洞体即可取得较好的经济效益。研究结果表明,塔河油田碳酸盐岩缝洞型油藏水平井可以采用鱼骨刺柔性管完井。
[Abstract]:When acid fracturing is put into production in horizontal wells of carbonate fracture-cavity reservoirs in Tahe Oilfield, there are some problems, such as the general acid-fracturing effect is not ideal, the acid fracturing in sections is difficult, the tool selection is difficult, the fracture strike is difficult to control, and so on. In this paper, numerical simulation method is used to analyze the effect of increasing production and economy of horizontal wells in carbonate fractured and cavernous reservoirs when they are completed with fishbone spiny flexible tube. The results show that the oil production of single well increases with the increase of the number of fish bone piercing flexible tube devices when the fish bone spiny flexible tube is not connected with the effective fracture cavity body, but the average oil increment of the single set of devices increases first and then decreases. In the wells with low probability of connected fractures and cavities, it is suggested that six or ten sets of fish bone piercing flexible tube devices should be used for completion operations. When a single effective fracture cavity body is connected, the oil production increases with the increase of the volume of the fracture cavity body, and when multiple fractures and cavities are connected and the total volume of the fractures and cavities is the same, the oil production increases with the increase of the volume of the fractures and cavities. The accumulative oil production increases with the increase of the number of connected fractures and cavities, and better economic benefits can be obtained by connecting more than one jointed cavity body. The results show that the fishbone spiny flexible tube can be used for the completion of horizontal wells in carbonate fracture-cavernous reservoirs in Tahe Oilfield.
【作者单位】：中国石化石油工程技术研究院;页岩油气富集机理与有效开发国家重点实验室;中国石化西北油田分公司工程技术研究院;
【基金】：中国石化科技攻关项目“自适应调流控水完井技术推广及工业化应用”(编号:P16117)资助
【分类号】：TE257

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