Characteristics and Control Factor of Preferential Water Drive Channel in Meandering River Sandstone

Abstract

In the process of long-term waterflooding development of sandstone oil fields, preferential water drive channels will be developed in the reservoir which cause uneven waterflood sweep and influence oil field development effect. Taking M-I-1 single sand layer in the Kumkol South Oil Field in South Turgay Basin, Kazakhstan, as an example, using logging interpretation, fine geological characterization, and reservoir numerical simulation method, this article studied static geological and dynamic development characteristics as well as control factor of preferential water drive channel of meandering river sandstone. In meandering river sandstone, the point bar sand is thick sand with lateral accretion shale beddings developing inside, so the injected water sweeps preferentially along the bottom part of the sand, causing the bottom part to be strongly waterflooded. And the bottom part of point bar sand is preferential water drive channel, which is strong water-intake (or strong liquid production) interval in injection water (production) profiles. Overbank sand is thin sand with low heterogeneity and therefore is non-weakly waterflooded, so overbank sand is not preferential water drive channel. The study confirms the fact that sandstone architecture control formation of preferential water drive channel and provides a basis for further potential tapping of meandering river sand bodies.

Copyright 2017, Shaanxi Petroleum Society.

This paper was prepared for presentation at the 2017 International Field Exploration and Development Conference in Chengdu, China, 21–22 September 2017.

This paper was selected for presentation by the IFEDC&IPPTC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC&IPPTC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC&IPPTC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC&IPPTC. Contact email: paper@ifedc.org or paper@ipptc.org.