scholarly journals Quantitative prediction of overburden pressure and overpressure zones using well logs - a case study of an x-field in the Niger-delta basin, Nigeria

2018 ◽  
Vol 6 (1) ◽  
pp. 65
Author(s):  
Chidozie Opara ◽  
Michael Ohakwereze ◽  
Okechukwu Adizua
Keyword(s):  
Bulk Density ◽  
Niger Delta ◽  
Quantitative Prediction ◽  
Overburden Pressure ◽  
Exploration And Production ◽  
Vertical Effective Stress ◽  
Niger Delta Basin ◽  
Sonic Logs

Prediction and evaluation of overburden pressure are critical for the exploration and production of hydrocarbon reservoirs. Overburden pressure was estimated using well log (density and sonic) data obtained from two wells (B1 and B2) of an X - Field within the Niger Delta basin. Overburden pressure depends primarily on the bulk density data. Bulk density was extracted from density and sonic logs based on the log signatures. The bulk density was then used to determine overburden pressure using Eaton’s equation. The results reveal that overburden pressure increases linearly with depth, and an overburden gradient of 1.0 psi/Ft. was obtained. The overburden pressure was used to estimate pore pressure and vertical effective stress and thus enabled the determination of overpressure zones within the well.

scholarly journals Modeling the Chance of Commerciality of Petroleum Assets for Economic Development

2021 ◽  
pp. 40-61
Author(s):  
U. Georgeson Victor ◽  
Omowumi O. Iledare ◽  
Joseph A. Ajienka
Keyword(s):  
Economic Development ◽  
Case Studies ◽  
Building Block ◽  
Niger Delta ◽  
Petroleum Resources ◽  
Niger Delta Basin ◽  
Cost Implications ◽  
The Cost ◽  
New Framework

The chance to discover hydrocarbon volumes of economic quantity diminishes with progressive discovery in explored basins. Given the preponderance of smaller deposits in extensively explored basins and the cost implications of discovering deposits less than the required Minimum Economic Reserves (MER), explorationists and investors in exploration activities need a framework to evaluate the chance of a successful petroleum resources discovery to minimize the risk of unsuccessful exploration. This study develops a new framework to evaluate the chance of discovery of at least a minimum economic reserves volume in an extensively explored basin. It leverages on the postulation for the determination of probability of hydrocarbon economic success as a building block for the new framework. The model combines the concepts of Minimum Economic Reserves, Discovery Efficiency and Probability to derive an explicit analytical function for discovery efficiency and hydrocarbon probability for a commercial discovery. It digitalizes existing Risk Table to ease the complexity to obtain geological chance of success and hydrocarbon asset evaluation for commerciality. Nine Case studies from the prolific Niger Delta basin of Nigeria are used to validate the model. The result of the semi-digital solution of the model shows that three of the studied cases are commercial whereas the remaining six cases are sub-commercial. The study recommends the application of the new framework for hydrocarbon asset evaluation for chance of commerciality to complement models like the cream off curve to predict chance of commercial discovery of hydrocarbon assets.

Feasibility Study Of Cutting Injection Operation: A Case Study Of The Niger Delta Basin

2006 ◽  
Author(s):  
Abraham Okorodudu ◽  
Akinwale C. Akinbodunse ◽  
Louise Linden ◽  
Loveday Anwuri ◽  
Dozie Onyewuchi Irrechukwu ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Niger Delta ◽  
Niger Delta Basin

scholarly journals Estimation of overpressures from porosity based method : a theoretical approach applied to the central/coastal swamp depo-belts of the Niger delta basin

2017 ◽  
Vol 6 (1) ◽  
pp. 14
Author(s):  
Ubon Mkpese
Keyword(s):  
Bulk Density ◽  
Pore Pressure ◽  
Theoretical Approach ◽  
Niger Delta ◽  
Sonic Velocity ◽  
Pore Pressure Prediction ◽  
Formation Resistivity ◽  
Pressure Regime ◽  
Niger Delta Basin

The Depth-dependent compaction theory that variations in certain geophysical properties with depth; bulk density, formation resistivity together with sonic velocity being a reflection of the pressure regime is the basis for pore pressure prognosis study. Pore pressure prediction (PPP), when done accurately can be used to avert disaster and helps in safe drilling. A porosity-based model has been applied to predict overpressured zones in an onshore environment of the Niger delta basin. Zones with hard overpressures greater than a magnitude of 0.7 psi/ft are generally within 10000ft and below. Top of overpressures for studied wells ranges between 7000ft and 10000ft. Porosities in shale are of typical values ranging between 0.05 to 0.46. A robust concordance between PPP and MPP profiles for each of the wells validates the results here and confirms suitability of model to the studied area.

scholarly journals Regional and field assessments of potentials for geological storage of CO2: A case study of the Niger Delta Basin, Nigeria

2020 ◽  
Vol 77 ◽  
pp. 103195 ◽  
Author(s):  
Bappah Adamu Umar ◽  
Raoof Gholami ◽  
Prasanta Nayak ◽  
Afroz A. Shah ◽  
Haruna Adamu
Keyword(s):  
Niger Delta ◽  
Geological Storage ◽  
Niger Delta Basin
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