陆梁油田低幅度中高渗薄层底水油藏井网调整方式

Well Pattern Adjustment of Thin and Bottom Water Reservoir with Low Magnitude and Mid-High Permeability in Luliang Oilfield,Junggar Basin

针对陆梁油田下白垩统呼图壁河组中高渗、低幅度、薄层底水油藏,充分利用密集的穿层井和2008—2012年位于注采井间的穿层井常规测井水淹层解释资料,建立了精细油藏地质模型和数值模拟模型。较好地处理了泥、钙质薄夹层规模及延伸方向和油水过渡带问题,获得了满意的生产动态历史拟合,模拟结果与实际水淹位置、厚度较吻合。准确地确定了薄层底水油藏剩余油分布和水驱规律,提出了薄层底水油藏合理优化的井网调整方式,为后续水驱体系改善、提高水驱效果及采收率奠定了基础,对类似油藏开发研究具有重要参考价值。

Based on the conventional well logging data of flooded layers interpretation from intensive translayer wells and injection-produc- tion interwell translayer wells in 2008--2012 in the thin and bottom water reservoir with low magnitude and mid-high permeability of Creta- ceous Hutubihe formation in Luliang oilfield of Junggar basin, detailed reservoir geological model and numerical simulation model were de- veloped, by which such problems as the size and extensional direction of thin mud and calcareous sandwich as well as the oil-water transi- tion zone were dealt with, obtaining satisfactory production history matching results and good agreement with the actual flooded location and thickness. And the remained oil distribution and waterdrive regularity of this reservoir are properly determined. Also, the reasonably optimizing well pattern adjustment mode for this reservoir is proposed for the first time. This will be helpful to the subsequent improvement of water flooding system, the waterdrive efficiency enhancement and EOR in this oilfield as well as a reference for study of similar reser- voirs development.