Victor Towoju | Ekiti State University, Ado-Ekiti, Nigeria (original) (raw)

Uploads

Papers by Victor Towoju

A good and profitable development of an oil and gas field starts with a good understanding of the... more A good and profitable development of an oil and gas field starts with a good understanding of the subsurface rock types and its structures. Subsurface map are maps that depicts geologic data or features below the earth surface. Many types of subsurface maps are in use in the petroleum industry, some of them are for special purposes; but those which are indispensable are the structure contour maps and the Isopach maps. Structure Contour map shows line of equal elevations relative to some horizontal datum, it is used in identifying structural traps for petroleum and water, and to determine the subsurface configuration of its aquifer; Isopach maps show the line of equal thickness for a single stratum or a group of strata, it is used in estimating the volume of a reservoir. The main objective of this work is to show that subsurface maps are important tools in oil and gas exploration.
Data from well logs, seismic data, sequence stratigraphy amongst all, are used in generating these subsurface maps; well logs as an example are used to delineate the boundaries of subsurface units for the preparation of variety of subsurface maps, one of such is the property map.
A case study of structural and stratigraphic mapping of Emi Field, offshore Niger Delta was considered and it was concluded that anticlinal closures and fault assisted closures regarded as good hydrocarbon prospect areas were delineated using the structure contour maps.
Therefore, it can be concluded that subsurface map is a very vital tool in the Oil and Gas industry.

Drafts by Victor Towoju

Reservoir characterization efforts focus on estimating the properties of subsurface rock units wh... more Reservoir characterization efforts focus on estimating the properties of subsurface rock units which are important in hydrocarbon exploration and exploitation using geologic, geophysical, petrophysical, and engineering disciplines, including uncertainty analysis of geologic and engineering data and spatial variations to describe petroleum deposits and the nature of the rocks that contain hydrocarbon. This work would evaluate the potential and use of 3D seismic data and well logs data interpretation to delineate potential reservoirs, map structures favorable to hydrocarbon accumulation, and mapping reservoir stratigraphy. Well data in reservoir characterization process provides direct measurement of reservoir properties such as porosity, water saturation, permeability, net pay, and lithology. Whereas seismic data are now commonly used for detailed stratigraphic interpretations, reservoir descriptions, and inputs for geologic modeling. The integration of both can aid in the delineation of stratigraphy, reservoir extension and modelling petrophysical properties of the reservoir.
A case study of an Integrated Approach to Optimal Reservoir Characterization of Z–Oil Field, Niger Delta by Nwankwo et al. (2017) was considered. From the study, it can be concluded that the integration of seismic and well log data can be a valuable tool in characterizing reservoirs.

2-D subsurface imaging was carried out with the dipole-dipole technique of geophysical survey

Thesis Chapters by Victor Towoju

Stratigraphy and the oil industry are intricately intertwined and have been so ever since the ear... more Stratigraphy and the oil industry are intricately intertwined and have been so ever since the early days of hydrocarbon exploitation. Stratigraphic understanding forms the basis for all upstream activity from basin exploration through field evaluation to reservoir development and production. In the quest for hydrocarbons, both the exploration and exploitation programs can be greatly enhanced by applying stratigraphic analysis. This technique provides the explorationist with the capability to recognize, discover and evaluate new hydrocarbon reservoirs and to reduce the risk in management's decision-making.
Stratigraphic approach to hydrocarbon studies can make use of high-resolution biostratigraphic and pale bathymetric data, well-log signatures and seismic-reflection profiles, and well core data to determine the lithostratigraphy, lithofacies, depositional sequences, and the sequence boundaries.
This study explores the integration of seismic and well-log data for stratigraphic studies. The identification of depositional environments from well logs is based on the principle that well log responses are related to changes in thickness, texture, grain size, and lithology along the well path, while the relection pattern recorded on seismic sections can be interpreted in term of depositional environment and lithofacies.
A case study of the Sequence Stratigraphy of Akos Field in the Coastal Swamp Depobelt of the Niger Delta was considered. From which it can be concluded that the integration of seismic and well log data for stratigraphic studies is a valuable tool for oil and gas exploration.

The geochemistry of stream sediments deals with the study or the comparison of major and trace el... more The geochemistry of stream sediments deals with the study or the comparison of major and trace element concentrations of an area using the stream sediments of the studied area. Stream sediments contain fragments that are derived from the erosion of weathered rocks by stream or river water. Depending on their particle size and stream water velocity, they are transported in suspension, by saltation or by creeping along the stream bed. Thus, they represent the source catchment area of the stream drainage network. Collected stream sediment samples can be analyzed and used to study various geochemical factors such as provenance studies and detection of mineral resources for mining.
Since stream sediments usually give an indication of all the minerals available upstream, they are usually used for low-cost reconnaissance survey for mining explorations.
A case study of a stream sediment geochemical survey of the Ganga River headwaters in the Garhwal Himalaya by Mukherjee et al, (2007) was considered. From the review, it can be concluded that stream sediments are indeed useful in the study of the distribution of mineable materials and also for the production of geochemical maps.

A good and profitable development of an oil and gas field starts with a good understanding of the... more A good and profitable development of an oil and gas field starts with a good understanding of the subsurface rock types and its structures. Subsurface map are maps that depicts geologic data or features below the earth surface. Many types of subsurface maps are in use in the petroleum industry, some of them are for special purposes; but those which are indispensable are the structure contour maps and the Isopach maps. Structure Contour map shows line of equal elevations relative to some horizontal datum, it is used in identifying structural traps for petroleum and water, and to determine the subsurface configuration of its aquifer; Isopach maps show the line of equal thickness for a single stratum or a group of strata, it is used in estimating the volume of a reservoir. The main objective of this work is to show that subsurface maps are important tools in oil and gas exploration.
Data from well logs, seismic data, sequence stratigraphy amongst all, are used in generating these subsurface maps; well logs as an example are used to delineate the boundaries of subsurface units for the preparation of variety of subsurface maps, one of such is the property map.
A case study of structural and stratigraphic mapping of Emi Field, offshore Niger Delta was considered and it was concluded that anticlinal closures and fault assisted closures regarded as good hydrocarbon prospect areas were delineated using the structure contour maps.
Therefore, it can be concluded that subsurface map is a very vital tool in the Oil and Gas industry.

Reservoir characterization efforts focus on estimating the properties of subsurface rock units wh... more Reservoir characterization efforts focus on estimating the properties of subsurface rock units which are important in hydrocarbon exploration and exploitation using geologic, geophysical, petrophysical, and engineering disciplines, including uncertainty analysis of geologic and engineering data and spatial variations to describe petroleum deposits and the nature of the rocks that contain hydrocarbon. This work would evaluate the potential and use of 3D seismic data and well logs data interpretation to delineate potential reservoirs, map structures favorable to hydrocarbon accumulation, and mapping reservoir stratigraphy. Well data in reservoir characterization process provides direct measurement of reservoir properties such as porosity, water saturation, permeability, net pay, and lithology. Whereas seismic data are now commonly used for detailed stratigraphic interpretations, reservoir descriptions, and inputs for geologic modeling. The integration of both can aid in the delineation of stratigraphy, reservoir extension and modelling petrophysical properties of the reservoir.
A case study of an Integrated Approach to Optimal Reservoir Characterization of Z–Oil Field, Niger Delta by Nwankwo et al. (2017) was considered. From the study, it can be concluded that the integration of seismic and well log data can be a valuable tool in characterizing reservoirs.

2-D subsurface imaging was carried out with the dipole-dipole technique of geophysical survey

Stratigraphy and the oil industry are intricately intertwined and have been so ever since the ear... more Stratigraphy and the oil industry are intricately intertwined and have been so ever since the early days of hydrocarbon exploitation. Stratigraphic understanding forms the basis for all upstream activity from basin exploration through field evaluation to reservoir development and production. In the quest for hydrocarbons, both the exploration and exploitation programs can be greatly enhanced by applying stratigraphic analysis. This technique provides the explorationist with the capability to recognize, discover and evaluate new hydrocarbon reservoirs and to reduce the risk in management's decision-making.
Stratigraphic approach to hydrocarbon studies can make use of high-resolution biostratigraphic and pale bathymetric data, well-log signatures and seismic-reflection profiles, and well core data to determine the lithostratigraphy, lithofacies, depositional sequences, and the sequence boundaries.
This study explores the integration of seismic and well-log data for stratigraphic studies. The identification of depositional environments from well logs is based on the principle that well log responses are related to changes in thickness, texture, grain size, and lithology along the well path, while the relection pattern recorded on seismic sections can be interpreted in term of depositional environment and lithofacies.
A case study of the Sequence Stratigraphy of Akos Field in the Coastal Swamp Depobelt of the Niger Delta was considered. From which it can be concluded that the integration of seismic and well log data for stratigraphic studies is a valuable tool for oil and gas exploration.

The geochemistry of stream sediments deals with the study or the comparison of major and trace el... more The geochemistry of stream sediments deals with the study or the comparison of major and trace element concentrations of an area using the stream sediments of the studied area. Stream sediments contain fragments that are derived from the erosion of weathered rocks by stream or river water. Depending on their particle size and stream water velocity, they are transported in suspension, by saltation or by creeping along the stream bed. Thus, they represent the source catchment area of the stream drainage network. Collected stream sediment samples can be analyzed and used to study various geochemical factors such as provenance studies and detection of mineral resources for mining.
Since stream sediments usually give an indication of all the minerals available upstream, they are usually used for low-cost reconnaissance survey for mining explorations.
A case study of a stream sediment geochemical survey of the Ganga River headwaters in the Garhwal Himalaya by Mukherjee et al, (2007) was considered. From the review, it can be concluded that stream sediments are indeed useful in the study of the distribution of mineable materials and also for the production of geochemical maps.