Diagenetic impact on unconventional tight carbonate reservoir of AR-F Member from the Abu Gharadig Field, north Western Desert, Egypt: insights from integrated combined sedimentological, petrographic, and petrophysical dataset

Hakimi, Mohammed Hail; Alqudah, Mohammad; Hamed, Tamer E.; Lotfy, Naira M.; Kahal, Ali Y.; Rahim, Afikah

doi:10.1007/s13146-024-00932-x

Cited by 2 publications

(1 citation statement)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…28 These microfacies suggest an open marine environment from slope to deep-shelf settings. 28,19 The OAE2 of the C/T succession of the Abu Roash-F Member has been well documented using stable isotopes, as concluded by Ibrahim et al 17 and Zobaa et al 19 However, the Abu Roash (F) Members have dense organic-rich sediments and act as conventional and unconventional petroleum resources in the basin. 29,30…”

Section: Geological Settingsmentioning

confidence: 99%

Characteristics of Cenomanian–Turonian Oceanic Anoxic Event 2 and its Impact on Organic Carbon Accumulation in the Abu Roash (F) Organic-Rich Carbonate Rocks in the Abu Gharadig Field, Egypt

Hamed,

Hakimi,

Lotfy

et al. 2024

ACS Earth Space Chem.

Self Cite

View full text Add to dashboard Cite

The Cenomanian−Turonian was a period of climatic perturbations associated with extraordinary marine production of organic carbon during the redox conditions in the southern Neo-Tethys Ocean. The Abu Roash-F carbonates in the northwestern desert of Egypt were deposited during this period. This work revealed some organic and inorganic geochemical results combined with microscopic examinations of the carbonate rocks of the mid-Cretaceous Abu Roash-F Member from two exploration wells in the Abu Gharadig Basin, Egypt. This work was designed to understand the paleoenvironmental conditions during Cenomanian− Turonian oceanic anoxic event 2 (OAE2) and its impact on the organic carbon-rich accumulation in Abu Roash (F) carbonates. Geochemical proxies indicated that AR-F contains total organic matter and sulfur contents in the ranges of 0.89−3.32 and 0.30−2.73 wt %, respectively, confirming the marine environment for the studied samples. The presence of a marine environment, ranging from deep sea to slope and deep shelf, was also inferred by the large quantities of planktic forams and other marine skeletal assemblages, including bivalves and echinoderms, with rare ostracods. The Ni and V geochemical proxies, together with their ratios and enrichment factors, confirmed that these facies were mainly found in low oxygen environments, ranging from dysoxic to anoxic nonsulfidic conditions, thereby contributing to the preservation of organic matter. An Rb/Sr ratio of less than 0.1 indicated that the facies were accumulated in warm and humid climates, thereby resulting in an intensity of subaerial weathering. The dominant presence of warm-water plankton species (i.e., Globigerinoides sp.) together with a large number of primary producers (i.e., algae and dinocysts) in the Cenomanian−Turonian AR-F carbonate facies further suggested that warm climatic conditions occurred during OAE2. These warm climatic conditions can be the source of a mass influx of nutrients into the basins, which could be attributed to increased productivity of the water column. The high productivity was further supported by the presence of the shelf nannofossil taxon Zeugrhabdotus erectus. Such conditions resulted in high productivity and preservation of organic matter during OAE2, and thus, organic carbon-rich accumulation in the carbonate-rich sediments within the AR-F Member.

show abstract

Section: Geological Settingsmentioning

confidence: 99%

Characteristics of Cenomanian–Turonian Oceanic Anoxic Event 2 and its Impact on Organic Carbon Accumulation in the Abu Roash (F) Organic-Rich Carbonate Rocks in the Abu Gharadig Field, Egypt

Hamed,

Hakimi,

Lotfy

et al. 2024

ACS Earth Space Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

Delineation of the reservoir petrophysical parameters from well logs validated by the core samples case study Sitra field, Western Desert, Egypt

Mohamed,

Mabrouk,

Metwally

2024

Sci Rep

View full text Add to dashboard Cite

In the northern section of the Western Desert, there are many extremely profitable petroleum and natural gas deposits in the Abu EL-Gharadig Basin. This study aims to highlight the hydrocarbon potential of Abu Roash F Formation, which stands for high organic content unconventional tight reservoirs, and Abu Roash G Formation which stands for conventional sand reservoirs, in Sitra field located in the central-western part of the Abu EL-Gharadig Basin. The research employed well-log data from four wells to ascertain petrophysical properties combined with core samples of two wells for a comprehensive examination and description of lithology. Initially, we commenced the execution of petrophysical analysis, encompassing log quality control procedures. Subsequently, we identified and revealed zones of interest and hydrocarbon indicators in both formations. Additionally, we ascertained the three most influential parameters, shale Volume, effective Porosity, and water saturation, which serve as defining factors for reservoir quality. Subsequently, an examination of the core samples, which encompassed lithologic description, lithofacies analysis, paleoenvironmental interpretation, petrographic analysis, and porosity assessment is conducted. For the sake of a more accurate interpretation, we conclude our research with cartographic maps created to evaluate the geographical distribution of hydrocarbon potential based on petrophysical characteristics, Distribution of the net-to-gross ratio among wells by correlating the litho-saturation models (rock models) for the four wells. The foregoing results declare that The Abu Roash F carbonate-rich rocks are a contender for unconventional tight oil reservoir potential with thin secondary porosity and high organic content, which normally requires a kind of hydraulic fracturing for prospective oil extraction, Furthermore, the upper section of Abu Roash G formation, particularly in well sitra8-03, has highly favorable conventional reservoir characteristics.

show abstract

Diagenetic impact on unconventional tight carbonate reservoir of AR-F Member from the Abu Gharadig Field, north Western Desert, Egypt: insights from integrated combined sedimentological, petrographic, and petrophysical dataset

Cited by 2 publications

References 53 publications

Characteristics of Cenomanian–Turonian Oceanic Anoxic Event 2 and its Impact on Organic Carbon Accumulation in the Abu Roash (F) Organic-Rich Carbonate Rocks in the Abu Gharadig Field, Egypt

Characteristics of Cenomanian–Turonian Oceanic Anoxic Event 2 and its Impact on Organic Carbon Accumulation in the Abu Roash (F) Organic-Rich Carbonate Rocks in the Abu Gharadig Field, Egypt

Delineation of the reservoir petrophysical parameters from well logs validated by the core samples case study Sitra field, Western Desert, Egypt

Contact Info

Product

Resources

About