Title: Analysis on Influencing Factors of Water Flooding in Volcanic Oil Reservoir of Huangshatuo Oilfield
Abstract: Huangshatuo oilfield is a fractured volcanic trachyte one with edge and bottom water.It has fracture-pore media reservoirs.After the water flooding in Huangshatuo oilfield,reservoir energy was supplied,but controlling degree,sweep area and water injection response of the water drive were difficult to control and there were no obvious stimulation results.In order to provide foundation for the next adjustment in the oilfield,the influencing factors of water flooding were analyzed including development degree of the fractures , relative position of injector and producer,producing situation of the oil well,oil displacement efficiency,injection time and water intake per unit thickness.The results show that the main influencing factors are the development degree and trend of the fractures and pores.In the developed fracture area,oil wells have high productivity with rapid breakthrough and response and water cut increasing;in the underdeveloped fracture area,the situation is on the contrary.In the same well group,the wells with small well spacing and injection height difference have rapid response of water flooding,so is the reverse.The oil wells with more than 10t/d of average daily liquid production and more than 2t/d of average daily water production have good response.Recovery efficiency of oil reservoir is not high for thin oil-water two-phrase region and low movable oil saturation.Longer injection time brings higher water intake and more response of water flooding in well group.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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