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应用油藏数值模拟技术,对陆梁油田陆9井区呼图壁河组K1h23油藏进行了全油藏和井组模拟。在建模时对主要生产层位进行了细分层,以较准确的描述油气水分布和注采对应关系。通过对全区及各单井主要指标的生产历史拟合,修正了地质模型和生产动态模型,更好地反映了该油藏的非均质性,进一步认识该油藏水驱油运动规律及剩余油分布特征。在此基础上,结合地质油藏工程研究成果,对薄层边底水油藏的开发方式、采油速度、合理产液量、合理压力保持程度、合理注采比等开采技术政策界限进行了研究。确定了该油藏应立足于注水开发,平均单井合理产液量约为20m3/d,合理采油速度应控制在1.6%,合理注采比为0.8左右,合理压力水平应在9.5Mpa以上。应用该数模研究成果,对油藏开发参数进行优化,油藏各项开发指标得到有效控制,并取得了良好的生产效果,油藏连续两年实现高产稳产,综合含水稳中有降,油田递减趋势明显减缓,区块地层能量得到恢复,预期采收率可提高3个百分点。
By using reservoir numerical simulation technique, a complete reservoir and well group simulation was carried out for K1h23 reservoir of Hutubihe Formation in Lu 9 well area of Luliang oilfield. During the modeling, the main production layers are subdivided to describe the distribution of oil, gas and water and the correspondence between injection and production more accurately. Through the production history fitting of the main indicators of the whole area and each single well, the geological model and the production dynamic model are amended to better reflect the heterogeneity of the reservoir and further understand the law of water displacement and oil displacement in the reservoir. Remaining oil distribution characteristics. On the basis of this, combined with the research results of geological reservoir engineering, this paper studies the development methods of the thin-bottom water-margin reservoirs, the oil production rate, the reasonable liquid production, the reasonable pressure maintenance, reasonable injection-production ratio and other mining technology policy boundaries . It is determined that the reservoir should be based on waterflood development. The average single-well production rate is about 20m3 / d. The reasonable production rate should be controlled at 1.6%. The reasonable injection-production ratio is about 0.8. The reasonable pressure level should be above 9.5Mpa. The results of numerical modeling are applied to optimize the reservoir development parameters. The development indicators of the reservoir are effectively controlled and good production results are achieved. The reservoir achieves high and stable yield for two consecutive years, The decreasing trend obviously slowed down and the energy of block formation was recovered. The expected recovery rate can be increased by 3%.