Researchers have successfully integrated petrophysical characterization and reservoir evaluation of the Kafr El Sheikh formation, focusing on optimizing hydrocarbon extraction at the Sapphire field off the Nile Delta coast of Egypt. Through innovative analysis using iso-parametric maps, the study delves deep and reveals significant reservoir potential.
The Kafr El Sheikh formation has emerged as attractive for hydrocarbon recovery, with effective porosity ranging between 14% and 34%. The research, which directly evaluates four key wells—Sapphire 1, Sapphire-Da, Sapphire-Deep 1, and Sapphire-Dh—uses well log data components like gamma ray, caliper, density, neutron, and resistivity to gauge reservoir characteristics. These elements are fundamental for assessing the quality of the reservoir and its productivity potential.
Hydrocarbon saturation levels were observed to be quite promising, capturing the gas content in the formation at rates varying from 55% to 85%. Notably, the findings showed the net pay thickness within this formation ranges widely from 0.46 m to 23.8 m along the field lines.
"The Kafr El Sheikh Formation, identified within the study area, stands out as a highly promising reservoir rock, showcasing a nuanced range of petrophysical parameters," say the authors of the article. This extensive variety of effective porosity coupled with significant gas saturation reveals the productive capacity of the formation, making it not only viable but also urging for future exploration and development endeavors.
This research is particularly important because of the historical underutilization of well logs and comprehensive petrophysical data, which has previously hampered effective recovery strategies. With significant gas prospects identified, particularly at the Sapphire Da well—flagged as the most favorable with 85% gas saturation—the study insists on capitalizing on opportunities to boost productivity.
While the historical data suggested only limited efficacy of some regions within the Sapphire field, fresh insights drawn from the latest analyses highlight specific developmental trends, primarily directed toward the central and northwest-southeast trajectories. These sections indicate higher effective porosity and hydrocarbon saturation, signaling zones ripe for operational advancements.
Understanding the lithological characteristics of the reservoir—largely consisting of sandstone and shale—clarifies the dynamic between water saturation, gas reserves, and recovery efforts. The shale volume significantly influences reservoir classifications, with levels lower than 35% indicating productive zones.
"Insights from iso-parametric maps are ... for future exploration and development within the Sapphire Field," the researchers add, emphasizing how careful delineation of productivity zones could inform drilling strategies and subsequent operations. These plans are pivotal for maximizing hydrocarbon output and ensuring the economic feasibility of projects within the Nile Delta region.
Given the complex geological setup and the potential for high gas yields, the study asserts the necessity for continued exploration efforts across the Sapphire field. The wealth of hydrocarbon reserves points to promising developmental opportunities, offering favorable prospects for improving productivity rates. This comprehensive analysis expands the frontier of hydrocarbon research and highlights the impact of sound geological studies on industry practices.