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Articles by Ghulam Abbas
Total Records ( 5 ) for Ghulam Abbas
  S. Kumar , Mariyamni Bt. Awang , Ghulam Abbas and Shuaib Ahmed Kalwar
  In Alkaline-Surfactant-Polymer (ASP) flooding, mobility control is one of the important factors for improving tertiary oil recovery. It is achieved by using polymeric mobility control agent such as partial hydrolyzed polyacrylamide (HPAM). However, polymer is highly degradable when subjected to high temperature; high salinity and high shear rates. These limitations of polymer adversely restrict the extension of ASP in such reservoirs conditions. In order to overcome these limitations, Wormlike Micellar (WLM) solution can be studied as a potential alternative. This study presents a review on application of WLM solution as mobility control agent for chemical EOR. It discusses the current limitations with existing polymers, comparison between WLM and polymerr.
  Ghulam Abbas , Sonny Irawan , Sandeep Kumar , Khalil Rehman Memon and Shuaib Ahmed Khalwar
  Polymers have been used in oil well cementing for improving the properties of cement slurry. Polysaccharides and their derivatives are mostly used as multifunctional additive in cement slurry. But these polymers present number of limitations at high temperature. Polysaccharides do not reveal an appropriate thickening of viscosity in cement slurry at high temperature which turn gives the fluid loss, gas migration and loss of economics. It is necessary to use such type of polymer in cement slurry that increases viscosity at high temperature. Therefore, this study present Hydroxypropylmethylcellulose (HPMC) polymer that is able to increase viscosity at high temperature and improve the properties of cement slurry. Laboratory experiments were performed to determine the characteristics of HPMC based cement slurry. The viscosity of 2 wt.% solution of HPMC polymer was determined at various temperatures. Further 0.20-0.50 gallon sack-1 concentration of HPMC polymer was used in cement slurry to evaluate the API properties of HPMC based cement slurry in term of rheology, free water, fluid loss, thickening time and compressive strength. It was observed that HPMC polymer was stable at high temperature and increases viscosity at elevated temperature. In cement slurries HPMC polymer resulted less than 50 mL of fluid loss; zero free water and predictable thickening time as well as enhanced final compressive strength with some other additives. The experimental result showed that HPMC has significantly improved the properties of cement slurry at high temperature.
  Khalil Rehman Memon , Muhannad Talib Shuker , Muhammad Khan Memon , Arshad Ahmed Lashari and Ghulam Abbas
  The Knowledge of the behaviour of cement slurries under elevated temperatures is necessary to understand properly cement rheology in moderate to deep-well cementing operations. The design of optimum cement slurry for oil well is highly challengeable for high temperature wells because slurry stability is a major requirement for successful oil well cementing the main objectives of cementing include, control abnormal pressure, zonal isolation, prevent from caving and wash out holes, support casing. For this purpose to understand rheological behaviour of cement slurry is essential for proper displacement and optimum placement at different temperature condition. Silica fume commonly available and cost-effective having sufficient quantity of amorphous substance to improvements in the physical and mechanical properties of cement slurry also a play very important role in strength development and increase rate of hydration. This paper describes to development of a cement slurry composition under laboratory condition to investigation the phenomena of optimum pump- ability through different concentration of silica fume from atmospheric condition to high thermal condition. Laboratory experiments showed that cement slurry is probably the more influenced by temperature; as temperature increased the changes occur in placing of cement slurry and the effect of high temperature decreasing plastic viscosity and yield point with the increasing temperature. The formulated cement slurry had advantages of low density, high strength, excellent rheology and high temperature tolerance, controlling the rheological behaviour of cement slurry can help to improve the relevant movement between particles, the stability and substitutability; according to the API standard.
  Sohail Jamil Qureshi , Ghulam Abbas and Sofia Bano
  A study was conducted to investigate the soil fertility status of Quaid -I- Azam University Campus Islamabad for the provision of guidelines to researchers and farmers for better crop production. A total of thirty composite soil samples were collected, analyzed and classified for texture, soil pH, electrical conductivity (EC), organic matter, available phosphorus and potassium. Texture of the soil varied, sandy loam (10%), loam (47%), and clay loam (43%). The pH values ranged between 6.9-8.5.Out of total all soil samples were normal with no hazard of salinity. Organic matter was deficient or poor in 93% samples and satisfactory in 7% samples. Available phosphorus was poor in 77% samples, satisfactory in 3% samples and adequate in 20% samples. In available potassium 60% soils in Quaid -I- Azam University have satisfactory level and 40% samples fall in adequate level. Fertilizer recommendations were advised according to soil condition and fertility status of the soil.
  Ghulam Abbas , Muhammad Yousaf and Rizwana Aleem Qureshi
  The present study has been conducted to determine the water quality and estimation of heavy metals of Fim Kassar Nallah. The water quality parameter including Hardness, Alkalinity, Total Suspended Solids and pH. The water samples were collected from the selected site for the period of six month from January to June 2005 on monthly basis. The data indicates that the amount of total suspended solids and electrical conductivity is not suitable for aquatic life. The values of pH were found more or less same during the six months. The values of total suspended solid were found to be higher during the month of June while there is no significance difference could be found between dissolved oxygen. The heavy metals including Copper, Zinc, Lead and Cadmium were tested by using Atomic Absorption Spectrophotometer. The data show that there is no significance difference among the concentration of heavy metals. The level of Copper and Zinc were found to be tolerable range which is 2 and 5 mg L-1 respectively, while the values of Cadmium and Lead were found higher than tolerable range for aquatic life which were 0.005 and 0.015 mg L-1, respectively.
 
 
 
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