Petroleum Engineering
Permanent URI for this communityhttps://repository.ui.edu.ng/handle/123456789/563
Browse
3 results
Search Results
Item Effect of Guinea corn husk ash with the addition of basic oil well additives under downhole conditions on oil well cementing(Elsevier Inc., 2023) Akintola, S.A.; Akintola, A.O.Primary cementing is one of the most important aspects of completing an oil well. In Nigeria, most of the raw materials used are imported. There is therefore a need to source locally for feasible alternative raw materials which are available, cheap in conversion and environmentally friendly. The aim of this research is to investigate the effect of the partial replacement of Class G cement with Guinea Corn Husk Ash (GCHA) when cementing oil wells. Basic oil well additives are added during the process and the slurry is tested under downhole conditions. The compressive strength tests were carried out at Bottom Hole Circulating Temperature (BHCT) of 1400C using the Ultrasonic Cement Analyzer (Chandler- Model 4265). The fluid loss tests were carried out using the Filter Press (Chandler- Model 8340).The High Pressure High Temperature Consistometer (Chandler Model 8340) was used to obtain the thickening time of the various slurries and the rheological properties determined using the Rheometer. The result obtained from the various experiments conforms to the recommendations in the American Petroleum Institute recommended practice 10B –2/ISO 10426–2. The compressive strength values were more than 3.45 MPa. The Fluid Loss was below 5 x10-5m3. The Plastic Viscosities was in the range of 3.0 MPa.S – 10.0 MPa.S and the Yield Point was in the range of 10.0 lb/100ft2 – 30.0 lb/100ft2. The values of the thickening time were between 2.43 hrs and 11.53 hrs. More experiments should be carried out to determine the effect of GCHA on Class G cement Slurry as an extender when cementing oil wells.Item Evaluating the effect of drying methods on the properties of a water base drilling mud(Science Publishing Group, 2021) Akintola, A.S.; Arigbe, T.E.It is important to understand the properties influencing the efficiency of a drilling fluid while drilling for oil and gas. As a result, drilling fluid must be designed in order to comply with three important requirements which are easy to use, cost effective and being environmentally friendly. Several studies have been carried out on the use of local materials as suitable substitute for imported additives. This study focuses on the use of starch processed from local cassava (Manihot esculenta Crant), (TME 419) using the process of wet milling and dried using three different methods namely: oven drying, direct heating and sun drying Due to this short coming resulting from the use of native starch, the starch was chemically modified using the process of esterification before being used as additive for treatment of the water-based drilling. The mud samples were prepared using Wyoming bentonite and distil water as the base fluid. Varying concentration of additives (0.5, 1.0 and 1.5 g) were added to the different mud samples and the laboratory test carried out in accordance with the API Recommended Practice 13B at varying temperatures (30, 50.70 and 90°C). The various mud samples rheological properties was determined using a Fann35A rheometer and the filtration properties using a low –Temperature and High –Pressure API Filter Press at 100 psi with a 3.5” filter paper. The mud samples labelled labeled A, B and C were treated with oven dry, direct heat and sundry modified starches, respectively. While two control mud samples were prepared using low viscous Carboxymethyl cellulose for mud sample D and extra high viscous CMC in sample E. Although the Viscosity and fluid loss profiles result of the mud samples, comparable performance with that of the commercial CMC’s. However, mud samples treated with oven dried starches presented the best results in their rheological as well as fluid loss properties.Item Evaluating the effect of drying methods on the properties of a water base drilling mud(Science Publishing Group, 2021) Akintola, A. S.; Arigbe, T. E.It is important to understand the properties influencing the efficiency of a drilling fluid while drilling for oil and gas. As a result, drilling fluid must be designed in order to comply with three important requirements which are easy to use, cost effective and being environmentally friendly. Several studies have been carried out on the use of local materials as suitable substitute for imported additives. This study focuses on the use of starch processed from local cassava (Manihot esculenta Crant), (TME 419) using the process of wet milling and dried using three different methods namely: oven drying, direct heating and sun drying Due to this short coming resulting from the use of native starch, the starch was chemically modified using the process of esterification before being used as additive for treatment of the water-based drilling. The mud samples were prepared using Wyoming bentonite and distil water as the base fluid. Varying concentration of additives (0.5, 1.0 and 1.5 g) were added to the different mud samples and the laboratory test carried out in accordance with the API Recommended Practice 13B at varying temperatures (30, 50.70 and 90°C). The various mud samples rheological properties was determined using a Fann35A rheometer and the filtration properties using a low –Temperature and High –Pressure API Filter Press at 100 psi with a 3.5” filter paper. The mud samples labelled labeled A, B and C were treated with oven dry, direct heat and sundry modified starches, respectively. While two control mud samples were prepared using low viscous Carboxymethyl cellulose for mud sample D and extra high viscous CMC in sample E. Although the Viscosity and fluid loss profiles result of the mud samples comparable performance with that of the commercial CMC’s. However, mud samples treated with oven dried starches presented the best results in their rheological as well as fluid loss properties.