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The Application of Well logging in Petrophysical Evaluation and Assessment of the Hydrocarbon Prospect in Abu Madi Reservoir, Abu Madi field, Onshore Nile Delta basin, Egypt

by : Fatma Gouda

Supervised by:

Dr. Ahmed Elbahrawy- Dr. Mohamed Sarhan

2022

Content

Exploration history

Exploration history

The first drilled well is Mit Ghamr-1

(Dry - reached the Upper Cretaceous)

Discovering the Abu Madi Field

(first success)

Rosetta-2 was the first well drilled offshore

First commercial discovery

Port Fuad (in Wakar formation)

Gas rights awarded

Raven and Satis Fields opened up the deeper Miocene-Oligocene trends

Phase 5 of exploration in Egypt, more in interest in Offshore Miocene play

Discovery of Zohr field

Figure 1. Nile Delta creaming curve and exploration advances.(Dolson.2018)

The Nile delta

Geological settings

  • One of the largest deltas in the world as it comprises an area of ca. 25,000 km2.

  • Represents a passive margin sedimentary basin that was initiated throughout the late-triassice early-cretaceous (may, 1991; dolson et al., 2001).

  • Its holding about 223 trillion cubic feet of gas reserves in more than126 fields scattered in the Nile Cone (Kirschbaum et al. 2010) , where there discoveries ranges from Oligocene to Quaternary.

lithology

  • The Nile delta’s depositional history was affected by Multiple tectonic activities and the changes of Mediterranean Sea level, as they controlled the Sediments supply and the accommodation area.

Tectonic and structure framework

Tectonic and structure framework

The offshore Nile Delta and northern Sinai have been subjected to many tectonic deformations during geological time (Abdel et al. 1994). During the Late Cretaceous Inversion, two-fold systems of the NE-SW and EW fold axes were created, each with differing sizes and amplitudes. A system of NE-trending fold axis is generated as a result of the transpressive movement of Rosetta and Temsah.

In the Mediterranean system, 9 fault trends (B fault systems) are recognized: •

  • ENE-WSW sinistral Pelusium mega-shear zone of pre-Cambrian.
  • E-W normal faults of Paleozoic).
  • NE-SW reverse faults of Late Cretaceous.
  • Arcuate normal fault zone (hinge zone Oligocene or older).•
  • NE-SW right-lateral transpressive movement (Rosetta fault trend-Early Miocene)
  • NW-SE right-lateral movement (Temsah trend -Middle Miocene).
  • N-S Baltim normal fault trend (late Miocene).
  • NW normal fault zone (Clysmic trend -Eocene-early Miocene)
  • NNE normal faults zone (Aqaba trend-Miocene to present).

Figure.4 Regional structural map of Nile Delta and gas-producing fields (Hanafy et al. 2017)

The hydrocarbon habitat

Source rock

Reservoir

net pay

seal and trap

Fig.5 Play schematic of the Nile Delta. Modified from Dolson et al. 2001

Significant newly found gas fields

Fig.6 Some of the hydrocarbon filed of Egypt (Source: Eni)

Zohr field

Zohr Gas Field

  • Zohr is the largest offshore natural gas in Egypt and the Mediterranean Sea.
  • The discovery could hold a potential of 30 trillion cubic feet of lean gas in place, according to drilling and seismic data.
  • The Zohr structure is located in sea depth of about 1500 metres.
  • The Zohr 1 NFW well was drilled to a total depth of 4,131 metres and encountered a 630-meter hydrocarbon column in a Miocene-aged carbonate sequence with good reservoir characteristics (430 metres plus of net pay).
  • In January 2018, production at the Mediterranean port of Zohr reached to 2 billion cubic feet per day (bcfd).
  • The hardships that exist in the pre-Messinian sequence, including the high pressure, the poor seismic imaging and the absence of direct hydrocarbon indicators (Dolson et al.2002).

Fig.7 Zohr play Concept (after Cozzi.et.al.2018)

The Nooros field

The Nooros field was discovered in the Nile Delta offshore area in July 2015 and put into production the following month in record time. It is currently Eni's most important gas-producing field in Egypt.The find fully demonstrates Eni's "near field" exploration strategy.

Nooros Gas Field

Practical work

Well name: AbuMadi_X

Location: onshore

Pay Zone: 3288-3321m (33m)

Belongs to Abu Madi Fm.

Fig.8 Petrophysical data with interpretation for zone A between depths 3279 and 3321 m in AbuMadi-X Well representing the highly promising characteristics for gas production

v

At depth 3288 m

Fig. 9 Petrophysical data interpretation at depth 3288m located at zone A in AbuMadi-X Well

Pickett plot

Fig.10 Pickett plot for zone A in AbuMadi-X Well

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