Papers by Mohammed Albaroot
Journal of African Earth Sciences
Arabian Journal of Geosciences, 2019
The present study makes an attempt to utilize reservoir parameters which have been integrated int... more The present study makes an attempt to utilize reservoir parameters which have been integrated into Arc GIS to delineate hydrocarbon potential zones in Masila oil field, Yemen. Petrophysical analysis has been carried out for a set of well logs data using Schlumberger Techlog software. Reservoir parameters calculated from well logs analysis include effective porosity (PHIE), permeability (K), Net-Pay thickness (N-PTh), hydrocarbon saturation (Sh), water saturation (Swe), the volume of shale (Vsh), and fault system (Fs). Petrophysical parameters prepared as contour maps, converted into raster format, classified and visualized as 2D/3D on GIS platform. Frequency ration model has been used to assess weighting score for each parameter with the help of existing wells location. Themes of reservoir parameters are reclassified by using weightage score of frequency ratio model. The result obtained from analyses of reservoir properties concluded that total effective porosity ranges between 17 and 38%, permeability between 108.89 and 903.30 mD, net-pay thickness 25-189.30 m, volume of shale 9-27%, water saturation 14-77%, and hydrocarbon saturation 73-86%, which is mostly concentrated in NW and SW in the study area. These parts of oil field reveal promising reservoir characteristics and have more hydrocarbon potential due to high values of permeability, porosity, and hydrocarbon saturation and less values of water saturation and volume of shale. The area is categorized into five potential zones, viz., very high, high, moderate, low, and very low. Reservoir cross plots of hydrocarbon occurrence have been used to validate the new potential zones. The result of overlay has shown very good correlation with the present ground situation. The outcome of this research will contribute to the development of the existing oil fields; besides, it will provide a superior database and will lead to improvement in decision-making to achieve higher hydrocarbon exploration and production.
Demand for irrigation water increases day by day along with meteorological vagaries and extension... more Demand for irrigation water increases day by day along with meteorological vagaries and extension of irrigated area in the drought-prone Jahran district. The study is aimed at studying the morphometric parameters of the Qa#39 Jahran basin in Jahran district and on their relevance in water resource management. The drainage network was prepared from the ASTER (DEM) and verified with survey and mineral resources board of Yemenrsquos maps in GIS environment.Quantitative morphometric analysis was carried out for different sub basins for linear aspects, areal aspects and relief aspects.The results of the morphometric analysis reveal that the QarsquoJahran basin is of dendritic pattern, high erosion activity, basin is underlined by uniform materials, basin is flat, Drainage density is moderate spacing streams, permeable sub soil materials with dense vegetated cover and low relief (alluvial plain), susceptible to flooding, gully erosion, enhanced ground water recharge potentiality, Form fac...
Egyptian Journal of Petroleum, 2018
This chapter is proposed to give the principal learning on the application of the formation of pe... more This chapter is proposed to give the principal learning on the application of the formation of petroleum source rocks and hydrocarbon generation to exploration activities. The evaluation of petroleum source rocks and hydrocarbon generation is a very important skill for explorationists todefinethelocationandtypeofpetroleum prospects in a region. In this chapter, subsurface samples from case study (Sayun-Masilah basin) were used to determine the source rock characteristics and petroleum generative potentials of prospective source rocks. Qualitative and quantitative evaluation of the source rock in this basin was done by means of geochemical and geophysical approaches for four rock units. It is clear that Madbi Formation is considered the main source, in which the organic carbon content reached up to more than 5.2 wt%. The types of organic matter from rock-eval pyrolysis data indicated that type I kerogen is the main type, in association with type II, and a mixture of types II and III kerogens. The study of the different maturation parameters obtained from rock-eval pyrolysis, such as T max and vitrinite reflectance, reflects that the considered rock units are occurred in different maturation stages, ranging from immature to mature sources. One-dimensional basin modeling was performed to analyze the hydrocarbon generation and expulsion history of the source rocks in the study area based on the reconstruction of the burial and thermal maturity histories in order to improve our understanding of the hydrocarbon generation potential. Calibration of the model with measured vitrinite reflectance (%Ro) and borehole temperature (BHT) data indicates that the paleo-heat flow was high at Late Jurassic. The models also indicate that the early hydrocarbon generation in the Madbi source rock occurred during late Cretaceous and the main hydrocarbon generation has been reached approximately at Early Eocene. Therefore, the Madbi source rock can be considered as generative potentials of prospective source rock horizons in the Sayun-Masilah basin.
Demand for irrigation water increases day by day along with meteorological vagaries and extension... more Demand for irrigation water increases day by day along with meteorological vagaries and extension of irrigated area in the drought-prone Jahran district. The study is aimed at studying the morphometric parameters of the Qa#39 Jahran basin in Jahran district and on their relevance in water resource management. The drainage network was prepared from the ASTER (DEM) and verified with survey and mineral resources board of Yemenrsquos maps in GIS environment.Quantitative morphometric analysis was carried out for different sub basins for linear aspects, areal aspects and relief aspects.The results of the morphometric analysis reveal that the QarsquoJahran basin is of dendritic pattern, high erosion activity, basin is underlined by uniform materials, basin is flat, Drainage density is moderate spacing streams, permeable sub soil materials with dense vegetated cover and low relief (alluvial plain), susceptible to flooding, gully erosion, enhanced ground water recharge potentiality, Form fac...
HYDROCARBON RESERVOIR CHARACTERIZATION USING WELL LOG IN HALEWAH OILFIELD, MARIB-SHABWA BASIN, 2017
The purpose of this study was to decipher some petro physical properties of studied wells in Hale... more The purpose of this study was to decipher some petro physical properties of studied wells in Halewah Oilfield, block-5, Marib-Shabwa basin, Yemen. Reservoir characterization of hydrocarbon reservoirs using well logs have been carried out in order to evaluate the field's hydrocarbon prospectivity, delineate hydrocarbon and water bearing zones and petro physical properties of the Alif reservoir. Alif reservoir is mainly made up of sandstone sediments with bands of shale that contain a substantial amount of proven oil in the Halewah Oilfield. Data from four wells comprising of gamma ray, resistivity, neutron, density logs were used for the study. Gamma ray log was used for lithology differentiation, Resistivity log was used to identify form the response of resistivities of various zones. High resistivity denotes hydrocarbon bearing zone while low resistivity value indicates water bearing zone or shaley zones. The combined density and neutron logwas used for the identification and differentiation of the various fluids (Oli and Water) in the reservoir. Computer-assisted log analyses were used to evaluate the petro physical parameters such as shale volume, total porosity, effective porosity, water saturation, hydrocarbon saturation, flushed zone saturation and reservoir and pay flags. Cross-plots of the petro physical parameters versus depth were illustrated. The results from the study showed that the Alif reservoir is capable of yielding appreciable hydrocarbon. The Upper Jurassic Alif reservoir reflects that the matrix components are mainly quartz and shales. Moreover, the lithological-geologic model reflected that these shales are strongly affecting the porosity and, consequently, the fluid saturation in the Alif reservoir, especially in the lower part of reservoir. The results from the study showed that the maximum Net-Pay is 64.79 m recorded around Halewah-02 well whereas minimum is 3.78 m recorded around Halewah-09 well. The evaluated petrophysical parameter indicated that effective porosity (PHE) ranges between (13-34%), water saturation (SWE)range between (13-31%), hydrocarbon saturation SH range between (69-88%), and permeability (220-12250).The Alif reservoir reveals promising reservoir characteristics especially the upper reservoir unit. The northwestern area should be taken into consideration during future development of the oilfield area. Copyright©2017, Albaroot et al., This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
NextGen Publication, 2018
Abstract— Demand for irrigation water increases day by day along with meteorological vagaries a... more Abstract— Demand for irrigation water increases day by day along with meteorological vagaries and extension of irrigated area in the drought-prone Jahran district. The study is aimed at studying the morphometric parameters of the Qa' Jahran basin in Jahran district and on their relevance in water resource management. The drainage network was prepared from the ASTER (DEM) and verified with survey and mineral resources board of Yemen's maps in GIS environment.Quantitative morphometric analysis was carried out for different sub basins for linear aspects, areal aspects and relief aspects.The results of the morphometric analysis reveal that the Qa'Jahran basin is of dendritic pattern, high erosion activity, basin is underlined by uniform materials, basin is flat, Drainage density is moderate spacing streams, permeable sub soil materials with dense vegetated cover and low relief (alluvial plain), susceptible to flooding, gully erosion, enhanced ground water recharge potentiality, Form factor and circularity ratio results represent an elongated shape, have a flatter peak flow for longer duration and drainage system were subject to less structurally controlled on the drainage development in over all the basin, low relief for most portion of the basin, high surface runoff and high susceptibility of the basin for both soil erosion and flooding.The higher slope gradient in the study area is contributed by the eruption of basaltic flow in northern, eastern and western parts. Higher slope gradient results in rapid runoff with potential soil loss or erosion. The Qa' Jahran basin relief value is 110m for sub basin 1 to 640m for sub basin 2 indicates low infiltration and high runoff conditions. The ruggedness number ofthe subbasins 1 and 2 indicates higher soil erosion susceptibility.
The Upper Jurassic samples of Jabal Ayban field, Sabatayn Basin, western Yemen were used to deter... more The Upper Jurassic samples of Jabal Ayban field, Sabatayn Basin, western Yemen were used to determine the source rock characteristics and petroleum generative potentials. Based on organic geochemical analysis , the Upper Jurassic source rocks have variable TOC content in the range of 0.82–13 wt%, indicating a fair to very good source rock generative potential. The bulk geochemical results showed that Safer Member contains Type III kerogen grading to mixed Type II–III, while the Lam and Meem members displaying generally Type II, mixed Type II–III and Type III kerogens, which have the ability to generate mixed oil and gas accumulations under thermal maturation level. Vitrinite reflectance in the range (0.35–0.78% Ro) and Tmax in the range (411–445 °C), generally proving that the Meem source rocks have sufficient thermal maturity for hydrocarbon-generation, whereas the Lam and Safer are immature source rocks. 1D basin modelling was performed to analyse the hydrocarbon generation and expulsion history of the study area. Calibration of the model with measured VR (% Ro) and (BHT) data shows that the paleo-heat-flow was high at Late Jurassic. The burial/thermal history models indicate that the source rocks in the Lam and Safer members are immature source rocks and the peak oil generation has not been reached yet. The models also indicate that the early hydrocarbon generation (0.64% Ro) in the Meem source rock occurred during late Jurassic at 150 Ma and the main hydrocarbon generation (0.79% Ro) has been reached approximately at 146 Ma. Therefore, the Meem Member can be consider as generative potentials of prospective source rock horizons in Jabal Ayban field, Sabatayn Basin.
Abstract-The accretion and breakup of supercontinent would form the dominant control on the geogr... more Abstract-The accretion and breakup of supercontinent would form the dominant control on the geographic position and timing of all tectonically intercede activity, and would there by profoundly influenced the tectonostratigraphic record of an area. This paper is summarized and discussed in detail the tectonostratigraphic events that correspond to the stratigraphic evolution in Yemen. In light of previous literatures papers, and proposed models of the formation of earth attempted has been made to re-arrange and re-ordered in a manner that be affected by or controlled by tectonics events and re-shaped formation in favor of these events. The objective of this paper is to elucidated the tectonostratigraphic of Yemen started from the Neoproterozoic time, when west Gondwana and east Gondwana collide ahead to the separation of India from afro-Arabia, ultimately to the last event represented by the opening of Gulf of Aden and Red sea and subsequent basins formed in or related to these events. All these events are effected the gross sedimentary accumulation, depositional environment and thickness of stratigraphy of Yemen.
ARTICLE INFO ABSTRACT The purpose of this study was to decipher some petro physical properties of... more ARTICLE INFO ABSTRACT The purpose of this study was to decipher some petro physical properties of studied wells in Halewah Oilfield, block-5, Marib-Shabwa basin, Yemen. Reservoir characterization of hydrocarbon reservoirs using well logs have been carried out in order to evaluate the field's hydrocarbon prospectivity, delineate hydrocarbon and water bearing zones and petro physical properties of the Alif reservoir. Alif reservoir is mainly made up of sandstone sediments with bands of shale that contain a substantial amount of proven oil in the Halewah Oilfield. Data from four wells comprising of gamma ray, resistivity, neutron, density logs were used for the study. Gamma ray log was used for lithology differentiation, Resistivity log was used to identify form the response of resistivities of various zones. High resistivity denotes hydrocarbon bearing zone while low resistivity value indicates water bearing zone or shaley zones. The combined density and neutron logwas used for the identification and differentiation of the various fluids (Oli and Water) in the reservoir. Computer-assisted log analyses were used to evaluate the petro physical parameters such as shale volume, total porosity, effective porosity, water saturation, hydrocarbon saturation, flushed zone saturation and reservoir and pay flags. Cross-plots of the petro physical parameters versus depth were illustrated. The results from the study showed that the Alif reservoir is capable of yielding appreciable hydrocarbon. The Upper Jurassic Alif reservoir reflects that the matrix components are mainly quartz and shales. Moreover, the lithological-geologic model reflected that these shales are strongly affecting the porosity and, consequently, the fluid saturation in the Alif reservoir, especially in the lower part of reservoir. The results from the study showed that the maximum Net-Pay is 64.79 m recorded around Halewah-02 well whereas minimum is 3.78 m recorded around Halewah-09 well. The evaluated petrophysical parameter indicated that effective porosity (PHE) ranges between (13-34%), water saturation (SWE)range between (13-31%), hydrocarbon saturation SH range between (69-88%), and permeability (220-12250).The Alif reservoir reveals promising reservoir characteristics especially the upper reservoir unit. The northwestern area should be taken into consideration during future development of the oilfield area. Copyright©2017, Albaroot et al., This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Uploads
Papers by Mohammed Albaroot