Geological Characteristics of the Potential Injection Production Dominant Channel in Marine Sandstone Reservoir—Taking Donghe Sandstone in Tarim Basin for Example

Abstract

Compared to the eastern sandstone reservoir, the internal interbed of marine sandstone reservoir is not continuous, so interlayer channeling and water cut are rising fast after long-term water flooding. Interlayer channeling is too serious to lead to the complex relation between oil and water movement, so the injection production dominant channel identification is more difficult than that of the eastern sandstone reservoir, but up to now the identification of this kind of reservoir is so rare. At present, the development of this kind of reservoir is just step into the middle or high water-cut stage, and the remaining reserves potential is huge, so accurately and efficiently identified and characterized of dominant channel has the vital significance for subsequent efficiently development of marine sandstone reservoir. In this paper, based on the marine sedimentary facies of Donghe sandstone in Tarim basin, using pair well method of core analysis, the pressure displacement experiment and core thin section observation, through comparing the reservoir property changes of different stages of waterflooding involving reservoir permeability, pore throat structure, in-layer heterogeneity, and shale content, obtain the geological characteristics of the potential injection production dominant channel in marine sandstone reservoir. The application result proved the research could judge the potential injection production dominant channels of different well groups and layers from the aspect of static geological characteristics, and has a good consistency with the dynamic development characteristics.

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.