Fractured slope to deepwater carbonates in Papua New Guinea present significant challenges from the perspective of calculating hydrocarbons in place and assessing reservoir productivity. Given the heterogeneous nature of the carbonates, significant difficulties arise when attempting to determine productive intervals using only petrophysical evaluations and borehole image logs. This paper discusses how productive intervals are identified by integrating mobility from formation pressure testers.
To determine the role exerted by diagenetic processes (mainly cementation and compaction) on the fluid storage and migration pathways within the slope to deepwater carbonates, permeability structures had to be appraised. Over the past several decades, wireline formation testers have proved to be an efficient method of assessing mobility and inferred productivity, in addition to gathering representative fluid samples for accurate pressure, volume, and temperature (PVT) analysis. Recent advancements have further improved the efficiency of wireline testers in such environments by combining the benefits of straddle packer systems with enhanced probes.
In this paper, in-depth analysis is presented on the integration of a comprehensive pressure and productivity data set acquired using the latest-generation wireline tools with advanced formation evaluation and image logs. The revolutionary advances provided by a new multifrequency dielectric tool were also used to provide an Archie mn exponent log from continuous in-situ measurement of rock texture.