敖362-98区块剩余油分布特征及潜力研究

发布时间：2018-06-01 06:05

本文选题：数值模拟 + 剩余油分布　；参考：《东北石油大学》2017年硕士论文

【摘要】：通过分析区块地质构造特点、储层发育状况以及裂缝发育情况,综合分析注水动态反映,通过应用数值模拟方法,研究区块剩余油分布特征及类型,在此基础上,针对不同剩余油井区存在问题,制定有针对性的治理对策。针对不同类型低效井制定治理对策,改善区块开发效果,为敖南低渗透裂缝性油田后期调整提供合理的依据。建模网格精度达到25m×25m×0.25m。全区综合含水拟合误差1.31%、日产油误差1.91%、日产液误差1.37%和累积产油误差1.34%,单井拟合符合率达到81.23%。平面上,剩余油主要分布在主体席状砂体和非主体席状砂体,占总剩余储量的92.69%;并统计分析不同井组剩余油,剩余储量在10×104t以下的井组,占总剩余储量的84.93%,同时,明确了6个剩余油富集区,富集区占总剩余储量52.89%。纵向上,剩余油主要分布在PI11、PI22、PI32和PI42沉积单元,占总剩余储量的69.14%;并统计分析了不同厚度级别剩余油,主要分布在小于1m有效厚度级别内,占总剩余储量的85.2%。总结出6种剩余油类型:滞留区型、差油层型、注采关系不完善型、裂缝水淹型、断层边部型和砂体边部型。依据不同剩余油类型,制定了相应的油水井组合挖潜模式,并针对整体和剩余油富集井区,分析了措施调整潜力,并提出了目前可实施措施类型。
[Abstract]:By analyzing the geological structure, reservoir development and fracture development of the block, and synthetically analyzing the dynamic reflection of water injection, the distribution characteristics and types of remaining oil in the block are studied by using the numerical simulation method. Aiming at the problems existing in different remaining oil well areas, the corresponding countermeasures are formulated. According to different types of low efficiency wells, the countermeasures are made to improve the block development effect, which provides a reasonable basis for the late adjustment of Aonan low permeability fractured oil field. The precision of modeling grid is 25m 脳 25m 脳 0.25m. The integrated water cut fitting error of the whole area is 1.31, the daily oil production error is 1.91, the daily liquid yield error is 1.37% and the cumulative oil production error is 1.34. The fitting coincidence rate of single well is 81.23. On the plane, the remaining oil is mainly distributed in the main sheet sand body and the non-main sheet sand body, accounting for 92.69% of the total remaining reserves, and the remaining oil in different well groups is statistically analyzed, the remaining reserves are less than 10 脳 10 4 t, accounting for 84.93% of the total remaining reserves. Six remaining oil accumulation areas are defined, which account for 52.89 percent of total remaining reserves. Longitudinally, the remaining oil is mainly distributed in the PI11 / PI22PI32 and PI42 sedimentary units, accounting for 69.14 of the total remaining reserves, and the remaining oil of different thickness levels is statistically analyzed, which mainly distributes within the effective thickness level of less than 1m, accounting for 85.2 percent of the total remaining reserves. Six types of remaining oil are summarized: retention zone type, differential reservoir type, imperfect injection-production relationship, waterflooded fracture type, fault edge type and sand body edge type. According to the different remaining oil types, the corresponding oil / water well combination potential tapping model is established, and the adjustment potential of the measures is analyzed for the whole and remaining oil enrichment well areas, and the types of measures that can be implemented at present are put forward.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE327

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