Abstract
High pour point oil reservoir contains various typical properties; such as a kind of high freezing point, high paraffin content and high cloud point temperature reservoir, while the temperature is regarded as high sensitive parameter for oil reservoirs. The current research aim is to develop and assess the effect by cold water flooding, the structure and properties model was built with the combination method of reservoir geological modeling and simulation. Various degrees of cold damage have deep relation with paraffin deposition and reservoir channel plug due to decline of temperature below the cloud point temperature. Precipitated paraffin has changed the rheological properties of crude oil, which can increase filtration resistance and reducing the oil displacement efficiency. Furthermore, model simulation analysis results compared under two different conditions cold and hot water flooding and predicted the inter well temperature field distribution belongs to reservoir through the model numerical simulation. Present study depicts that the integrated method base on log, geological data and experiment can predict and analysis the temperature variation efficiently, while thermal displacement method has efficiently improved the high pour-point oil reservoir development effect, increasing oil mobility and enhancing oil recovery.
Highlights
High pour point oil reservoirs are usually part of the developed oilfields in various regions worldwide
Cold water damage is a consequence of paraffin deposition from decline of temperature at production and injection wells due to gas expansion and evolution (Ring et al, 1994) or cold water injection eventually causing low sweep and rapid water encroachment (Bedrikovetsky, 1997; Leontaritis, 2005, 1996)
Steam flooding is injected into light-oil low-permeability sand light-oil reservoir and enhances its oil recovery (Qiaoyun et al, 2013)
Summary
High pour point oil reservoirs are usually part of the developed oilfields in various regions worldwide. To evaluate the particular oil reservoir properties, such as high pour point oil, many scholars, at home or abroad, have carried out a series of thermodynamic studies using hot water flooding, steam flooding and so on, are necessary for safe investment. Present experiments and field tests are in the majority, temperature simulation analysis which was aimed at high pour point oil occupies little. Eng. Technol., 7(23): 4945-4965, 2014 study modeling and numerical simulation integration method for the effective displacement at different temperatures base on log, geological data and experiment was applied by the relevant software; during modelling the best injection temperature was establish which may provide some guidance for future oil exploitation and adjusting of oilfield. Due to sound reservoir description analysis oil development can be enhanced (Fig. 2)
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