一种非均质油藏高含水期调堵效果的简易测算方法

发布时间：2018-05-01 05:29

本文选题：高含水阶段 + 水侵优势通道　；参考：《断块油气田》2017年05期

【摘要】：具有优势水侵通道的注水开发油藏在油井高含水期仍存在大量剩余油,可通过对水淹大孔道的调堵,实现对该类油藏的挖潜。然而,目前仍难以定量描述和表征注采井之间的大孔道对注水开发的影响情况,因此对调堵效果的预测具有较大的不确定性。文中将注采井之间的油藏流动区域视为相对均质的油藏与大孔道的并联,分别采用渗流和管流模型计算油井的无因次采液指数与含水率,通过生产数据的拟合,建立快速测算图版,确定大孔道的等效孔径,进而计算大孔道封堵后油藏的流动能力及油井再次达到特高含水期的驱油效率。实例分析表明,该方法所需参数较少,能够实现非均质油藏大孔道调堵效果的快速测算。
[Abstract]:There are still a large number of remaining oil in waterflooding development reservoirs with dominant water invasion channels during the high water cut stage of oil wells, which can be realized by plugging the large channels of water flooding and tapping the potential of this kind of reservoirs. However, it is still difficult to quantitatively describe and characterize the influence of large pores between injection-production wells on water injection development, so the prediction of plugging effect is uncertain. In this paper, the flow region between injection and production wells is regarded as the parallel connection between relatively homogeneous reservoir and large pore channel. The dimensionless recovery fluid index and water cut are calculated by using percolation and pipe flow models, respectively, and the production data are fitted. A fast measuring chart was established to determine the equivalent pore size of the large pore channel, and then to calculate the flow capacity of the reservoir and the oil displacement efficiency of the oil well to reach the extra high water cut period after the plugging of the large pore channel. The analysis of examples shows that the method requires less parameters and can be used to measure the plugging effect of large pore channels in heterogeneous reservoirs.
【作者单位】：西南石油大学油气藏地质及开发工程国家重点实验室;中国石油大庆油田责任有限公司开发部;
【基金】：国家科技重大专项课题“特高含水期多层非均质油藏渗流机理及水驱规律研究”(2016ZX05054-010)
【分类号】：TE357.6

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