https://repository.sustech.edu/handle/123456789/1319 2026-04-06T16:12:22Z 2026-04-06T16:12:22Z Ahmed, Mustafa Mohammed Mustafa Mohammed Supervisor, -Elradi Abbas Mohamed Nour https://repository.sustech.edu/handle/123456789/27043 2022-03-08T07:11:56Z 2021-04-20T00:00:00Z

Experimental Investigation of Using Steam Flooding in Fula North East Reservoir – Sudan Ahmed, Mustafa Mohammed Mustafa Mohammed; Supervisor, -Elradi Abbas Mohamed Nour Thermal recovery methods and especially steam flooding have long been considered as the most effective methods to extract heavy oil reservoirs. These highly viscous hydrocarbon deposits are proven to constitute a huge proportion of total world oil reserves. Large volumes of heavy oil in Fula North East Oilfield SUDAN have a high viscosity (2019 centipoise at reservoir temperature 43°C) are located in heterogeneous porous media containing high permeable wormholes or non-permeable shale barriers. The main objective of this study is to investigate the feasibility of using Steam Flooding in Fula North East (FNE) - Sudan. FNE reservoirs are high porosity (30%), permeability (1000-3500 mD), and unconsolidated in nature. the fluid properties include a viscous crude range from 15 to 17.7 API. The corresponding viscosity is 2019 cp at reservoir conditions (Temperature 43C and Reservoir Pressure 571 Psi). The research-based on physical simulation to scale of a Steam flood using one core sample from well#FNE-135 to represent the reservoir, steam core flood experiments were conducted By (STEAMFLOOD 700) station in Petroleum Labs, Research and Studies (PLRS), to study the efficiency of Steam flood in order to decrease the viscosity and improve oil recovery. The core sample was aged with crude oil at 43°C for 21 days to conduct the best conditions before the experimental. The experimental of steam flooding in core scale showed that the oil viscosity decreasing from 2019 cp at reservoir temperature 43° C to 1.5cp due the steam injection, which the mobility ratio was improved, furthermore, the residual oil saturation reducing from 80.1% by water flooding to 53.8% by steam injection, as well, the recovery factor RF increasing by steam flooding from 8.6% to 30.1%, moreover, the displacement sweep efficiency ED improved from 9% by cold production to 38% by steam flooding, also the experiment showed clear incremental in formation volume factor due to effect of the steam injection compared to cold production. Thesis

2021-04-20T00:00:00Z Said, Reela Mubark Salim Supervisor, -Abbas Musa Yagoub https://repository.sustech.edu/handle/123456789/26881 2021-12-21T09:16:56Z 2020-12-12T00:00:00Z

Borehole Image Log Analysis for Sedimentary Environment and Fractures Identification in Jake East Field Said, Reela Mubark Salim; Supervisor, -Abbas Musa Yagoub The borehole imaging technology has great advantages to provide more information for subsurface formations for exploration wells in Sudan. The electrical image log tool Stimu Taneous Resistivity Imager (STAR) used in this case study for an exploration well in Jake East oil field. The electrical image log tool (STAR) includes 144 electrodes which measure the formation microresistivity and the log is displayed as an image of the borehole. Necessary preparations including log data processing and corrections on the (STAR) log Checked the data quality of log record before image log before started the data processing and interpretation. All corrections are used to enhance the log quality, locate the image data in the correct depth position and match the image log with the conventional logs. According to image log result well section has been divided into four different sections in Abu Gabra formation, for the interpretation used special petrohysical software (Cif Log Geomatrix) .Image log interpretation is carried out in the information about different types of fractures developed. In this study the electrical image logs and conventional logs together with mud logging datawere studied. The purpose of this work is to interpreted the reservoir sedimentary environment .lithofacies and fractures analysis. In addition a quantitative analysis of sedimentary features like bedding, faults and fracture dip angle and azimuths were studied. This is an integrated study combined independent Image Log interpretation data for single well with others logs to accurate analysis for the reservoir in Abu Gabra Formation. The result is used for identification of the sedimentary bedding features, depositional settings andstructural elements in the image log. Plenty of geologic features detected 753 Cross beddings, 241 Bed boundaries, 541 Laminasand few Erosional layers. The statistics of sedimentary geological features in the STAR showed very rich laminas and cross beddings developed in the logged interval, which indicate the sedimentary facies of the logged interval.The dip magnitudes and dip azimuths reflect the structure features or sedimentary environment. Lithofacies and possible depositional environment have been interpreted first based on the mud logging samples description from master logs combined with conventiallogs. The depositional environments, from Abu Gabra 3, Abu Gabra 2e, Abu Gabra 2d to Abu Gabra1 group, indicated by lithofacies, sedimentary structure and bedding on the GR curveand the image, were probably shallow lacustrine to delta facies. Finally different types of natural fractures were detected in case study well in Jake East area around 3 conductive fractures and 35 discontinuous conductive fractures interpreted with highdip angle in Abu Gabra Formation. Thesis

2020-12-12T00:00:00Z Abdorhman, Hussam Eldeen Ahmed Mohammed Supervisor, -Assistant Professor. Fatima Ahmed Elberir https://repository.sustech.edu/handle/123456789/26657 2021-10-06T12:12:54Z 2020-10-12T00:00:00Z

Production optimization of Sufyan Oil Field in Sudan Abdorhman, Hussam Eldeen Ahmed Mohammed; Supervisor, -Assistant Professor. Fatima Ahmed Elberir Production problems encountered during field life vary in its complexity and its. Production optimization is considered vital factor in which production challenges are analyzed and several proposals are considered to tackle problems. Many Sudanese oil field suffer from production decline due to various problems such as artificial lift malfunctions and design difficulties. Therefore, Sufyan field was selected to this study due to sharp production decline caused by such problems. The Sufyan field is located is western side of Block 6, Sudan. Sufyan area for the time being, the field consist of twelve structures with proved oil. Production started on Mar.15, 2015 from Suf-1 and EPF Start pumping fluid on 20. Apr, 2015. The research studied the artificial lift performance in Sufyan wells after production network model was initiated, considering artificial lift factors; in which pump sizing was main factor. The low performance pumps were replaced and multiple scenarios were applied to optimize and conclude the best remedy action to be proposed. Optimum scenario was therefore selected; consider overall production increment by 2000 BOPD and 14 % decrement in cost due to artificial lift change. Thesis

2020-10-12T00:00:00Z Mohemmed, IbrahimElmahdyAbdelaziz Supervisor, -ElradiAbassMohamedNour https://repository.sustech.edu/handle/123456789/26656 2021-10-06T11:46:24Z 2021-06-15T00:00:00Z

A Study of WaterInjection Applicationfor increasing oil Recovery in South AnnajmaOil Field-Sudan Mohemmed, IbrahimElmahdyAbdelaziz; Supervisor, -ElradiAbassMohamedNour Water flooding is the most widely used secondary recovery process in the world today. Along with the recent decades, water injection is still a promising technique for improving oil recovery. The main objective of this work is to ascertain the optimal water injection arrangement to vertical water flooding at the South Annajma oil field using a reservoir simulation model (ECLIPSE) commercial software. This work came out with analyses of oil production rate, water cut, reservoir pressure drop, accumulated oil production, and recovery factor for the South Annajma reservoir as a heterogeneous model. The result of this simulation work showed the effectiveness of eight years of water flooding in the enhancement of production performance. However, South Annajma reservoir heterogeneity would introduce an uncertainty of geological model, which could bring a mismatch between the simulated case and a real case, the increase in oil recovery achieved throughout the model scenarios is 32%. Thesis

2021-06-15T00:00:00Z