辽河油田LG块数值模拟与水平井优化设计

发布时间：2018-08-02 12:16

【摘要】：辽河油田LG块属于稀油底水油藏,该断块地质条件复杂,构造幅度大,总面积约1.02km2。该区块自1988年3月开始开采以来,截止到2012年10月底,该区块共有井24口,原油总采收率为16%。由于地质条件复杂、断块封闭以及构造幅度大等原因,导致该区块的主力油层剩余油分布不均匀。为了挖掘主力油层剩余油潜能,提高采收率,通过数值模拟研究和水平井参数优化,部署水平井4口。旨在通过LG块的水平井有效部署,为辽河油田的可持续发展及提高水平井产能方面提供技术支持。本文利用Petrel地质建模软件建立了LG块地质模型,在地质模型的基础上利用Eclipse数值模拟软件进行了水驱历史拟合及剩余油分布规律研究,详细分析了储层非均质性、断层封闭、构造以及注采井网不合理等原因对剩余油分布所造成的影响。利用Eclipse数值模拟软件,在拟合后的LG块实际模型中,进行了水平井参数优化:水平段纵向避底水厚度为16m;水平井平面位置为雷24-10井和雷25-11井北部的红色锥间内;水平井平面方位与构造等深线和沉积相平行,即沿着构造等深线的方向落在单一的主流河道内;水平井水平段长度为300m;水平井分段射孔完井方式为打开程度60%时,第1段和第3段避射;平面注采位置为直井与水平井趾部成45度角;注采井距为200m;水平井与直井纵向注采位置为水平井位于油层上部,直井位于油层下部;水平井排距为200m。根据水平井参数优化结果,在LG块实际模拟模型中,指导部署水平井4口。
[Abstract]:LG block in Liaohe Oilfield belongs to thin oil and bottom water reservoir. The fault block has complex geological conditions and large tectonic amplitude, with a total area of about 1.02 km2. By the end of October 2012, the block had 24 wells and a total oil recovery of 16 percent since it began production in March 1988. Due to complicated geological conditions, block closure and large tectonic amplitude, the remaining oil distribution of the main reservoir in the block is uneven. In order to excavate the residual oil potential of the main reservoir and improve the oil recovery, four horizontal wells were deployed through numerical simulation and the optimization of horizontal well parameters. The aim of this paper is to provide technical support for the sustainable development of Liaohe Oilfield and the improvement of horizontal well productivity through the effective deployment of LG block horizontal well. In this paper, the geological model of LG block is established by using Petrel geological modeling software. On the basis of geological model, the historical fitting of water flooding and the distribution of remaining oil are studied by using Eclipse numerical simulation software. The heterogeneity of reservoir and the sealing of fault are analyzed in detail. The influence of the structure and the unreasonable injection-production pattern on the distribution of remaining oil. Using Eclipse numerical simulation software, the parameters of horizontal well are optimized in the fitted LG block model: the thickness of vertical bottom water in horizontal section is 16 m, the horizontal well is located in the red cone in the north of Lei 24-10 well and Lei 25-11 well, and the horizontal well is located in the north of Lei 24-10 well and Lei 25-11 well. Horizontal well horizontal azimuth is parallel to structural isobath and sedimentary facies, that is, along the direction of structural isobath, it falls in a single mainstream channel; horizontal section length of horizontal well is 300 m; horizontal well is perforated and completed by opening degree 60 times, The position of horizontal injection and production is 45 degrees angle between horizontal well and toe of horizontal well; the distance between injection and production is 200 m; the horizontal well and vertical injection and production well are located in the upper part of oil layer and the vertical well is located in the lower part of reservoir; the horizontal well row distance is 200 m. According to the optimization results of horizontal well parameters, 4 horizontal wells are deployed in LG block simulation model.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE319;TE32

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