Technique of heavy oil finite sand control completion

In this paper,the technical concept and technological measures of heavy oil finite sand control completion arc pres- ented for the character of heavy oil's flow fault and proppant -carrying capacity,and established are relevant mathematic models.The core is to improve the physical characteristics of heavy oil reservoir,to increase the drainage radius of oil well,and to raise the heavy oil production through the tech- niques as spigot product first and then sand PrOteCtion, coarse sand prevention and fine sand discharge under the ex- traction condition of sand control.The main point is to in- crease the flow path of heavy oil by making the space be- tween sieve and collar and the pore throat radius greater far and away than the throat radius of pore in oil reservoir on the base of the sand-carrying amount,the granularity distribu- tion of extruded sand,the median grain diameter of sand in oil reservoir,the statistical average of pore throat radius. The key is to select the base value in preset oil yield to choose the slot width of sieve tube,and to calculate the mini- mum length of spigot in the recovery processes of the indi- vidual reservoir and the multiplex reservoirs on the base of the cumulative weight perccntage of coarse sand grain and the porosity of natural pileup of coarse sand.The technique of heavy oil finite sand control completion is successfully ap- plied in No.six block in Sudan.