摘要
针对辽河油田曙四区曙22块生产时间长、含水率高、剩余油分布规律不清楚等特点,根据油藏类型以及渗流理论[1],利用Eclipse油藏数值模拟软件建立了该区块油藏数值模型,产量劈分考虑了实际射孔井段厚度及井底流动压力差,对该区块地质储量、压力、含水率及单井生产历史进行了拟合,地质储量拟合相对误差为5.1%,83%的单井历史拟合误差小于8%。油藏数值模拟结果表明,曙22块剩余油分布主要受层内非均质性、断层、井网不完善等因素的综合影响,形成剩余油的主要原因是井网不完善、断层的遮挡性以及层内非均质性引起的水驱见效的差异性。总体上,在断层的附近,尤其是断块的高部位,都有一定的剩余油富集。
In view of the unique feature of Block Shu-22 in Liaohe Oil field being on production for a long time, with high water cut and relatively unclear residual oil distribution pattern, Eclipse Black-Oil simulator was used to establish numerical model of the study block, and also the field perforation interval thickness and bottom hole flowing pressure along with drawdown are taken into account in the model. History matching was carried out on pressure, well production data as well as on water cut and in combination with oil reserves estimation. The relative error for reserves estimation was 5.1%, while 83% of the production wells matched had less than 8% relative error. The reservoir simulation indicated that Shu-22 residual oil distribution is mainly under the influence of horizontal heterogeneity and faults, with the combined influence of the well pattern not being completely uniform. Residual oil distribution is subject mainly to horizontal heterogeneity, whereas fault barrier property along with horizontal heterogeneity induced water-flood response order and direction. As a whole, nearby fault, especially the high parts of the fault-block are all bounded with high residual oil content.
出处
《工程地球物理学报》
2008年第1期108-114,共7页
Chinese Journal of Engineering Geophysics
