Abstract
3D geometric modeling has received renewed attention recently, in the context of visual scene understanding. The reservoir geometry of the Baltim fields is described by significant elements, such as thickness, depth maps, and fault planes, resulting from an interpretation based on seismic and well data. Uncertainties affect these elements throughout the entire interpretation process. They have some bearing on the geometric shape and subsequently on the gross reservoir volume (GRV) of the fields. This uncertainty on GRV also impacts volumes of hydrocarbons in place, reserves, and production profiles. Thus, the assessment of geometrical uncertainties is an essential first step in a field study for evaluation, development, and optimization purposes. Seismic data are best integrated with well and reservoir information. A 3D geometric model of the Late Messinian Abu Madi reservoirs in the time and depth domain is used to investigate the influence of the reservoir geometry on the gas entrapment. Important conceptual conclusions about the reservoir system behavior are obtained using this model. The results show that the reservoir shape influences the seismic response of the incised Abu Madi Paleovalley, making it necessary to account for 3D effects in order to obtain accurate results.
Highlights
The Nile Delta Basin started to show its hydrocarbon potential in the early 1960s
The area of study is a part of Nile Delta offshore area (Figure 1), which is characterized by the presence of large number of gas fields that have a big amount of reserves from the hydrocarbon point of view [6, 7]
We have seen that the role of geometric modeling is becoming more important for exploring reservoir structures. 3D geometric modeling provided a useful means towards understanding the structure of Abu Madi reservoirs
Summary
The Nile Delta Basin started to show its hydrocarbon potential in the early 1960s. Since generations of geologists and geophysicists have applied different concepts and methodologies to explore this area, keeping pace with the latest available technologies. Regional gravity surveys were followed by extended 2D seismic surveys up to almost a routine 3D acquisition in the 1990s [1] Following this technological and conceptual evolution, the rate of technical success approached almost 100% in the last exploratory phase of the Abu Madi Formation when 3D seismic data and seismic attributes were extensively used to predict the sand distribution within the Abu Madi Paleovalley [1]. Baltim area lies to the north of the Nile Delta between latitudes 31∘3725 and 31∘5619N and longitudes 31∘112 and 31∘267E, about 25 km off the Egyptian Coast It covers an area of about 500 km, with a length of 25 km and a width of 18.75 km (Figure 1). The area of study is a part of Nile Delta offshore area (Figure 1), which is characterized by the presence of large number of gas fields that have a big amount of reserves from the hydrocarbon point of view [6, 7]
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