Long-distance transportation method for Fengcheng Ultra-heavy Oils blended with diesel

In allusion to the characteristics of Fengcheng ultra-heavy oil produced in Xinjiang Oilfield and its problems in long-distance pipelining, considering the current process requirements of Karamay Petrochemical Company, the advantage and disadvantages in common diluents used in blending transport technology are analyzed and a new transport method of the ultra-heavy oils diluted with ^#0 diesel to reduce their viscosity is proposed. Regarding Fengcheng's 010-Well and 59-Well as a research subject, the basic compositions and properties, rheological behaviors and viscosity-temperature behaviors of their samples with and without water were tested and analyzed using the rheological and bottle-test methods and related test standards, and the dehydration of two ultra-heavy oils and viscosity reduction of their samples with and without water under the dilution of ^#0 diesel were evaluated. The results showed that two Fengcheng oils belonged to typical ultra-heavy oils, and choosing light diesel as their diluent had distinct safety and economic advantage. Diluting the heavy oils with ^#0 diesel could not only reduce their viscosity significantly, but also was helpful for their dehydration. The heavy oils diluted with 20 v%~25 v% ^#0 diesel showed a good flowability and pumpability under the temperature range of 80~90 ℃.