Three Blocks Of The Karamay Oilfield Heavy Oil Viscosity Reducer Development Mechanism

There are abundant heavy crude reserves in Karamay oilfield in Xinjiang Autonomous District, which is one of the four main heavy crude production units. Due to the complicated geologic settings and unsuitable production technology, production effects by cyclic steam injection are pretty worse. The phenomenon of sand production, earth production and gas channeling is very popular. We consigns us to develop a kind of reducing viscosity agent and takes charge its production and application.Research on the technology of reducing viscosity on heavy crude is a bit less all over the world. We carry out a lot of consultant on literatures, and draw up selection principles on surfactant in accordance with the theorems of oil emulsion and surfactant. Through a lot of experiments, we successfully develop YC series reducing viscosity agents and put them into field. Field experiments show that YC series reducing viscosity agents can make heavy crude to be O/W emulsion and decrease its viscosity. Because of decrease of coefficient of flow resistance, oil-well production increases greatly and a good benefit is awarded. Through field experiments, favorable economic impacts are not only be obtained, we have but also acquired a great deal of precious field application experience, which is the base on greatly popularizing the technology of reducing heavy crude viscosity.Furthermore, in order to probe into the principles of reducing viscosity, we carry out investigation in interfacial tension character, indoor core flooding experiments, infrared spectrum and chromatograph research, and conclusion is as follows:Through research on the principles of reducing viscosity by agents, it not only provides us with theory base and experience to further research on other kinds of heavy oil, but also takes on a promising prospect to exploit the heavy oil reservoirs.