裂缝性底水稠油油藏水平井AICD控水技术研究

doi:10.11885/j.issn.1674-5086.2023.04.06.04

摘要/Abstract

摘要： 裂缝性底水稠油油藏微裂缝发育、原油黏度高、含水上升快，常规水平井开发难以确保开发效果，水平井控水开采此类底水能力强的油藏一直是开发主攻方向。南海L油藏为该类的典型，投产二十多年，采出程度不到12%，而综合含水已达96%以上。高角度裂缝发育是油田底水快速上升、开发效果差的主要原因，同时储层基质中的原油难以得到有效动用，大量剩余油仍存在于基质与孤立的溶孔溶洞中。历史增产措施采用化学堵水、常规ICD控水等技术效果较差。通过分析AICD控水技术的机理，结合物理模拟、数值模拟以及现场实际应用情况研究了其适用性，认为AICD技术能够提高该类油藏水平井有效生产井段的生产，进而改善开发效果。通过矿场选井评价了AICD可以利用其机理自主抑制微裂缝高渗带流量，均衡水平井供液剖面，提高水平井波及系数，从而达到增加有效井控储量的控水增油目的，具有较好的推广应用价值。

关键词: 裂缝, 底水, 稠油, AICD控水, 控水增油

Abstract: Fractured bottom water heavy oil reservoir is the characteristic of micro-fracture development, high viscosity of crude oil and rapid rise of water cut. It is difficult to ensure the development effect by conventional horizontal well development. The development of such reservoir with strong bottom water control ability by horizontal well is always the main direction of development. Nanhai L Reservoir is a typical reservoir of this type. And has been put into production for more than 20 a, with recovery less than 12%, and comprehensive water cut more than 96%. The results of chemical water plugging and conventional ICD water control are poor. The development of high angle fractures is the main reason for the rapid rise of oilfield bottom water and poor development effect. At the same time, the crude oil in the reservoir matrix is difficult to be effectively used, and a large number of remaining oil still exists in the matrix and isolated karst caves. We analyze the mechanism of AICD water control, studies its applicability in combination with physical model, numerical model and field application, and conclude that AICD technology can improve the production of effective production intervals of horizontal wells in this kind of reservoir, and thus improve the development effect. According to the evaluation of well selection, AICD is a mechanism of controlling water and increasing oil production by controlling the flow of micro fracture and high permeability zone independently, balancing the liquid supply profile of horizontal well, improving the sweep efficiency of horizontal well and increasing the effective well control reserves.

Key words: fracture, bottom water, heavy oil, AICD water control, water control and improve oil

中图分类号:

TE53

杨勇, 孙常伟, 江任开, 李小东, 刘远志. 裂缝性底水稠油油藏水平井AICD控水技术研究[J]. 西南石油大学学报(自然科学版), 2025, 47(2): 105-114.

YANG Yong, SUN Changwei, JIANG Renkai, LI Xiaodong, LIU Yuanzhi. Mechanism and Applicability of AICD Water Control in Fractured Bottom Water Heavy Oil Reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(2): 105-114.

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