Permeability Prediction from Log Data using Machine Learning Methods
Article in Press
In this paper, models for permeability prediction of oil reservoirs using a machine learning approach and petrophysical data are compared. Various machine learning methods, including such multi-resolution graph-based clustering, conventional artificial neural networks and Extreme Learning Machines are employed to have a comprehensive comparison. RCAL data from one of Iran's oil reservoirs was used to develop and test the...
Article in Press
In adverse drilling environments such as high-pressure high temperature (HPHT) wells, the elevated temperatures and pressures encountered downhole by drilling fluids may degrade their chemical constituents. This may undermine the drilling fluid’s ability to carry out its functions effectively and result in problems while drilling. Some of the challenges encountered by conventional drilling fluids in HPHT environment...
An Overview of Oil and Gas Production in Kenya – A Decade of Progress and Challenges
Article in Press
This paper is part of an ongoing Ph.D. research. It explores the overview of the upstream sub-sector of the oil and gas industry, specifically, the production division in Kenya as of March 2022, and highlights the current state, the impending progress, and obstructing challenges that must be overcome if Kenya desires to emulate the likes of Norway in managing its newly found oil resources. All the data in this paper has...
Article in Press
Guar and its derivatives are the most common biopolymer used in hydraulic fracturing fluid design. However, guar leaves residues behind in solution, it is not suitable at higher temperatures, and it is not immune to the market forces of demand and supply. This work is a step to sourcing alternative hydrocolloids for hydraulic fracturing fluid design. The rheological properties of Mucuna flagellipes, Cyamopsis tetragonoloba...
Article in Press
Explosions due to gas leaks from accidents and human errors are major concerns faced in natural gas and related industries. Understanding its formation and dissociation mechanisms at field conditions is keys to its successful prevention and management. In the present study, two different meshes with different sized flow channels were proposed to prevent and control methane combustion in a circular gas pipeline. The...
Article in Press
Oil reserves in the Niger Delta have being gradually decreasing due to the increased production. New large field discoveries are scarce therefore there is need to improve on the production from existing reserves. Low salinity surfactant flooding (LSSF) is a potential enhanced oil recovery process to increase oil production in the Niger Delta oil fields. In this study, sodium dodecyl sulphate and ethanol were used as...
Article in Press
Methane is the principal component of natural gas. In order to be liquefied, it is has to pass through a compression station where its’ temperature is lowered. An experimental investigation of the temperature drop behaviour of methane gas has been carried out. The test section is a horizontal circular tube with an inner diameter of 6 mm, an outer diameter of 8 mm and a length of 1500 mm. The physical parameters of the gas...
An Experimental Approach to the descaling of Production Tubing Using High Pressure Flat Fan Nozzles
Article in Press
The mechanical approach of utilizing high-pressure water for scale removal has gained wider acceptance by multinationals despite facing poor downhole performance challenges (cavitation) that need abrasion compensation (sand) with side effect of jeopardizing the integrity of the well completions. The replacement of sand with sterling beads was excellent with good post descaling well completion integrity at the expense of...
Performance Evaluation of oil based drilling fluid formulated with Castor Oil
Article in Press
Oil Based Muds are usually formulated with Diesel oil and despite being effective in executing its functions as a drilling fluid has proven to be quite expensive and environmentally unfriendly. Numerous research has been conducted using various types of oils with the aim of assessing their use as alternatives to diesel oil based mud and successes were observed. This current study focuses on investigating the suitability of...
Article in Press
Sheikhan crude oil faces obstacles during transportation from production wellsite to processing facilities due to high viscosity. To enhance the flowability, reducing the sheikhan crude oil viscosity is a promising approach. For this purpose, a heavy crude oil sample from Sheikhan oilfield was blended with various rate of industrial polar solvents such as (Toluene, methanol) and gas condensate at different...
Effect Of Improved Water And Gas Injection Schemes On Synthetic Oil Rim Models
Article in Press
Oil recovery in oil rim reservoirs are usually affected by reservoir and operational parameters. Placket Burman design of experiment was used to develop various models of oil rims with a broader range of uncertainties. Mensuration analysis was used to create the basic grid designs while the Eclipse software was used to incorporate PVT (pressure, volume and temperature) and solution properties to create a black oil model...
Testing and Analysis Rheological Properties of Water Based Mud Using New Organic Additives
Article in Press
Polymers which are used as fluid loss control agents are commonly organic and are used in both circulating as well as non-circulating phases of drilling operations. Drilling costs associated with these types of agents are very high contributing to 5 – 15% of total drilling costs and hence it is very important to find a substitute for these additives that can be used for same purpose but at lower drilling cost and at...
Laboratory study of rheological properties of novel drilling fluid
Article in Press
Rheological specifications of drilling mud which contains nano zinc oxide ( 1 gr) in high temperature – high pressure viscometer are considered in this work to simulate the drilling conditions occurred in deep wells. Shear stress, shear rate, effective viscosity, plastic viscosity and gel strength are measured versus temperature (30, 40, 50, 60, 70 and 80 C) and working time (0, 1, 3, 5, 7, 10, 12 and 15 days). Also,...
Article in Press
The drive for infill drilling is capacitated by the sudden quest for oil and gas development and optimization particularly in the Niger Delta has critical geotechnical constraints such as the favourable position, number of wells and even to know when the well should come on stream. The aim of this study is to apply the above statement with the view of determining the reasonable maximum cumulative gas to be produced and to...
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