Gas-generative potential for the post-Messinian megasequence of Nile Delta Basin: a case study of Tao Field, North Sinai Concession, Egypt

Abstract

The main aim of the article is to evaluate the gas potentiality for the post-Messinian megasequence in TAO Field, North Sinai Concession, offshore Nile Delta Basin. The detailed petrophysical analysis for three deviated wells in the study area (Tao-3 ST1 Well, Tao-5 STA Well and Tao-7 Well) revealed that the Pliocene Kafr El-Sheikh Formation includes eleven gas-bearing zones. These zones were named: A, B, C in Tao-3 ST1 Well and D, E, F in Tao-5 STA Well. In Tao-7 Well, the interesting zones are named G, H, I, J and K. All of these sandy intervals are relatively shallow in depth and differ in thickness between 4 and 56 m. These zones are characterized by shale volume (10%), total porosity (30–40%), effective porosity (30–35%), gas saturation (50–90%), high effective permeability to gas and low permeability to water. The seismic data displayed that listric faults and the associated rollover folds have an important role in forming structural traps for the examined gas-bearing zones in Tao Field and its surroundings. This work revealed that the success rate in discovering new gas prospects within the Pliocene–Pleistocene succession at North Sinai Concession is very high.

The potential of offshore Nile Delta Basin natural gas reserves: a case study of Messinian reservoir in Baltim field

“…On the other hand, the gas-holding intervals in Tao field (Fig. 16) vary in thickness between 4 and 56 m. The computed properties for these reservoirs display highly auspicious characteristics for gasproduction; little shale volume (around 0.10); high effective porosity (0.30-0.35), low water saturation (0.10-0.50), low bulk volume water, high values of relative permeability for gas and low in relative permeability to water (Sarhan 2021b). Furthermore, the presence of listric faults and linked rollover folds played an important part in the formation of structural traps for gas-bearing intervals in the Tao Field and its surroundings (Sarhan 2021b).…”

A New Method for Determining Economic Well Pattern Density and Infilling Time of Tight Gas Reservoirs

“…Effective gas and water permeability reflect the expected fluid flow through the production process from hydrocarbon reservoirs. The increase in values of gas permeability means the reduction in water permeability to flow out from the reservoir (accordingly, the extracted fluid during production will be gas) and vice versa [24]. An accurate understanding of pore pressure distribution is crucial for casing design, mud optimization, and safe and successful drilling [25].…”

Petrophysical Evaluation of Wakar Formation, Port Fouad Marine Field, Offshore Nile Delta

“…The structural trends of the Nile Delta were recognized by four major groups of faulted trends northeast-southwest trend (Rosetta trend, pelusium trend, Qattara-Eratosthenes line), northwest-southeast trend (Temsah trend and Bardawil line), E-W Coastal fault trend (Tethyan trend and hinge zone) and minor fault trend dividing the Nile Delta into provinces; The South Delta province, The North Delta province, The Nile cone and Western and Eastern Delta province (Zaghloul, 2001: Sestini, 1995: Said, 1990: Sarhan and Hemdan, 1994. Temsah trend separates the Eastern sub-basin from the central sub-basin.…”