Quantitative Identification Method of Injection Production Dominant Channel in a Marine Sandstone Reservoir

Abstract

Good sweep improvement in waterflooding reservoirs requires an understanding of the dominant channel between injector and producer during tertiary recovery process. In this context, marine reservoirs present unique challenges. The insulating layer of a marine sandstone reservoir is very poor, which leads to interlayer channeling and fast water-cut rising. The complex relation between oil movement and water movement contributes to profile modification challenges. In this study, a quantitative method using an ensemble of static data such as logging interpretation data, characterization data of sedimentary lithofacies and interbeds between wells, and dynamic data like production data, perforation data, waterflooded layer interpretation data, and testing data was first established to understand the predominant connection relationship between injector and producer. The proposed method was used to identify the injection production dominant channels of seven well groups in a marine sandstone reservoir. The results showed that the channel development mode can be classified into two types of development in the same layer and development across the layer, and the ratios were 53.57 and 46.43%, respectively. The development depth of injection production dominant channel could be identified to 1–2 m inside layer. The identification results could provide a practical guidance during profile modification in the tertiary recovery process.

Copyright 2017, Shaanxi Petroleum Society.

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