The selection of intervals to be perforated in naturally fractured reservoirs is often aided by the use of wellbore images.

The current trend in several mexican fractured reservoirs is to include an analysis of wellbore images to define production intervals.

Visualization of the rock texture is also possible from images, and differentiation of secondary porosity types can be defined. Standard logging techniques to detect fractures do not distinguish betwen unconnected vugs and open natural fractures. In tight carbonate formations, hydrocarbon production comes mainly from these fractures.

Other data that can be obtained from the images are the orientation and frequency of fractures, their relationship with the reservoir structure and porosity, and their distribution.

This paper includes examples and correlations betwen producing intervals and wellbore images.

You can access this article if you purchase or spend a download.