The Characteristics and Distribution Pattern of Seafloor Sinuous Pockmark Train in the Niger Delta Basin, West Africa

The sediment of #3 Well of the Greater Ughelli Depobelt are represented by sand and shale intercalation. In this study, lithofacies analysis and X-ray diffraction technique were used to characterize the sediments from the well. The lithofacies analysis was based on the physical properties of the sediments encountered from the ditch cuttings. Five lithofacies types of mainly sandstone, clayey sandstone, shaly sandstone, sandy shale and shale and 53 lithofacies zones were identified from 15 ft to 11295 ft. The result of the X-ray diffraction analysis identified that the following clay minerals – kaolinite, illite/muscovite, sepiolite, chlorite, calcite, dolomite; with kaolinite in greater percentage. The non-clay minerals include quartz, pyrite, anatase, gypsum, plagioclase, microcline, jarosite, barite and fluorite; with quartz having the highest percentage. Therefore, due to the high percentage of kaolinite in #3 well, the pore filing kaolinite may have more effect on the reservoir quality than illite/muscovite, chlorite and sepiolite. By considering the physical properties, homogenous and heterogeneous nature of the #3 Well, it would be concluded that #3 Well has some prospect for petroleum and gas exploration.

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Sedimentary facies and petrographic analyses of Miocene nearshore deposits, Central Swamp Depobelt, onshore Niger Delta Basin: implications for reservoir quality

Journal of Sedimentary Environments ◽

10.1007/s43217-021-00076-1 ◽

2021 ◽

Author(s):

Joseph Nanaoweikule Eradiri ◽

Ehimare Erhire Odafen ◽

Ikenna Christopher Okwara ◽

Ayonma Wilfred Mode ◽

Okwudiri Aloysius Anyiam ◽

...

Keyword(s):

Niger Delta ◽

Sedimentary Facies ◽

Reservoir Quality ◽

Petrographic Analyses ◽

Niger Delta Basin

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Evaluation of Reservoir’s Petrophysical Parameters, Niger Delta, Nigeria

International Journal of Advanced Geosciences ◽

10.14419/ijag.v5i1.7456 ◽

2017 ◽

Vol 5 (1) ◽

pp. 19

Author(s):

Ubong Essien ◽

Akaninyene Akankpo ◽

Okechukwu Agbasi

Keyword(s):

Niger Delta ◽

Gamma Ray ◽

Water Saturation ◽

Petrophysical Parameters ◽

Niger Delta Region ◽

Average Porosity ◽

Irreducible Water Saturation ◽

Open Hole ◽

Bulk Volume ◽

Niger Delta Basin

Petrophysical analysis was performed in two wells in the Niger Delta Region, Nigeria. This study is aimed at making available petrophysical data, basically water saturation calculation using cementation values of 2.0 for the reservoir formations of two wells in the Niger delta basin. A suite of geophysical open hole logs namely Gamma ray; Resistivity, Sonic, Caliper and Density were used to determine petrophysical parameters. The parameters determined are; volume of shale, porosity, water saturation, irreducible water saturation and bulk volume of water. The thickness of the reservoir varies between 127ft and 1620ft. Average porosity values vary between 0.061 and 0.600; generally decreasing with depth. The mean average computed values for the Petrophysical parameters for the reservoirs are: Bulk Volume of Water, 0.070 to 0.175; Apparent Water Resistivity, 0.239 to 7.969; Water Saturation, 0.229 to 0.749; Irreducible Water Saturation, 0.229 to 0.882 and Volume of Shale, 0.045 to 0.355. The findings will also enhance the proper characterization of the reservoir sands.

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