The method of identification of abandoned channel by dense well pattern and its application in A Oilfield

Reservoir evaluation room of Geological Research Institute, the fifth oil production plant, Daqing Oilfield, China

Abstract

The existence of abandoned channel represents the end of the evolution history of single river channel. Taking the C layer in B area, A oilfield as an example, synthesizing the logging response characteristics, plane distribution pattern and the relative depth map method of sand top of abandoned channels, abandoned channels were identified under the guidance of modern deposition theory. In the three-dimensional window, a multi-angle observation and analysis of connected well profiles was carried out by using the underground dense well pattern data, and a total of 10 parts were identified in the research area, including s-type and pen-moon abandoned channel.