Abstract
Changing down-hole conditions observed during hydrocarbon exploration can be divers. Some desired ones concern oil/gas shows while others may vary from borehole/drilling fluid association and pressure situations. Managing pressure variations and geopressure zones while drilling has been an issue of concern which has yield generic positive results over the years. However pre-pressure zones (i.e. zones above pressure zones), can display characteristics that are worthy of note in view of the underlying rock potential. Pore pressure and fracture pressure has been evaluated using Eaton’s equations amongst others on data for some reservoir of Agbada formation in the petroliferous Niger Delta. This is in view of knowing the potential of this pre-pressured zone with effective porosity and water saturation necessitated by production operations and well re-entry processes. These computations adopted various pressure models and have yielded good result presented as plots. It was observed that depth of rock units is the main indicator of rock shrinkage leading to increase in fracture due to increase in production and hydraulic fracturing. Adequate attention must be paid to the integrity (density) of the explored formation as they become sandwiched with under-compacted argillaceous sediments.
John, R & TaiyeOlushola, A (2021). Pore Pressure And Fracture Gradient Assessment From Well Log Petrophysical Data Of Agbada Formation, South-East Niger-Delta. Afribary. Retrieved from https://afribary.com/works/pore-pressure-and-fracture-gradient-assessment-from-well-log-petrophysical-data-of-agbada-formation-south-east-niger-delta
John, Rotimi and Adeoye TaiyeOlushola "Pore Pressure And Fracture Gradient Assessment From Well Log Petrophysical Data Of Agbada Formation, South-East Niger-Delta" Afribary. Afribary, 19 May. 2021, https://afribary.com/works/pore-pressure-and-fracture-gradient-assessment-from-well-log-petrophysical-data-of-agbada-formation-south-east-niger-delta. Accessed 26 Apr. 2024.
John, Rotimi, Adeoye TaiyeOlushola . "Pore Pressure And Fracture Gradient Assessment From Well Log Petrophysical Data Of Agbada Formation, South-East Niger-Delta". Afribary, Afribary, 19 May. 2021. Web. 26 Apr. 2024. < https://afribary.com/works/pore-pressure-and-fracture-gradient-assessment-from-well-log-petrophysical-data-of-agbada-formation-south-east-niger-delta >.
John, Rotimi and TaiyeOlushola, Adeoye . "Pore Pressure And Fracture Gradient Assessment From Well Log Petrophysical Data Of Agbada Formation, South-East Niger-Delta" Afribary (2021). Accessed April 26, 2024. https://afribary.com/works/pore-pressure-and-fracture-gradient-assessment-from-well-log-petrophysical-data-of-agbada-formation-south-east-niger-delta