Mechanism and Applicability of AICD Water Control in Fractured Bottom Water Heavy Oil Reservoir

doi:10.11885/j.issn.1674-5086.2023.04.06.04

Abstract

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

CLC Number:

TE53

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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