Pore pressure detection and risk assessment of OBL oil field, offshore Niger delta, Nigeria
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ABSTRACT
The Niger Delta is a prolific petroleum sedimentary
basin in the Gulf of Guinea and is posed with a major
challenge of overpressure development in many of its
fields. Integrated study, utilising 3D seismic data and
well logs from four wells, namely; OBL_1, OBL_2, OBL_4
and OBL_5 was carried out in the offshore Niger Delta.
The study aims at evaluation of structural influences
on pressure development, detection of overpressure
zones and consequently examining the risk involved
in drilling. Log signatures show decrease in density log
values and corresponding increase in sonic log readings in wells OBL_1, OBL_2 and OBL_4. Well OBL_5, reveals increase density log values but decrease sonic log
readings. Two regional and few minor faults observed
to penetrate the overpressure zones were mapped out
and integrated with the surfaces of the tops of the over
pressured zones to generate three stratigraphic zones.
Aside from under compaction mechanism, the regional faults penetrating the surfaces generated across the
overpressure intervals could have influenced pressure
development in the wells.
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The Public Access, L (2021). Pore pressure detection and risk assessment of OBL oil field, offshore Niger delta, Nigeria. Afribary.com: Retrieved April 10, 2021, from https://afribary.com/works/pore-pressure-detection-and-risk-assessment-of-obl-oil-field-offshore-niger-delta-nigeria
Library, The Public Access. "Pore pressure detection and risk assessment of OBL oil field, offshore Niger delta, Nigeria" Afribary.com. Afribary.com, 01 Apr. 2021, https://afribary.com/works/pore-pressure-detection-and-risk-assessment-of-obl-oil-field-offshore-niger-delta-nigeria . Accessed 10 Apr. 2021.
Library, The Public Access. "Pore pressure detection and risk assessment of OBL oil field, offshore Niger delta, Nigeria". Afribary.com, Afribary.com, 01 Apr. 2021. Web. 10 Apr. 2021. < https://afribary.com/works/pore-pressure-detection-and-risk-assessment-of-obl-oil-field-offshore-niger-delta-nigeria >.
Library, The Public Access. "Pore pressure detection and risk assessment of OBL oil field, offshore Niger delta, Nigeria" Afribary.com (2021). Accessed April 10, 2021. https://afribary.com/works/pore-pressure-detection-and-risk-assessment-of-obl-oil-field-offshore-niger-delta-nigeria