Study On Technology Of Steam Flooding Of Liaohe Oilfield Du 229 Block

Du 229 block structures located on the middle of western slope of western depression, Liaohe Basin. The reservoir type of blcok is medium-bedded edge and bottom water ultra-heavy oil reservoir. It has been developed in 1998with vertical well huff and puff method for the calibration recovery 23.4%. After 10 years of development, degree of blocks recovery reached to 21.1%, degree of recovery of recoverable reserves reached to 90.13%. Block development went into the final straight of vertical well huff and puff method. It is need to do Development Mode Conversion in order to achieve the stable of Du 229 block.The development method of heavy oil means mainly huff and puff, steam flooding, SAGD and burning oil. The relatively mature technologies are huff and puff, steam flooding and SAGD, in which the recovery of steam flooding and SAGD is over 60% or more much higher than 25% of huff and puff. By comparing three method filter criteria of reservoir parameters, analysis Du 229 block XinglongtaiⅣⅤGroup reservoir. Steam flooding has been developed with the implementation of the conditions after 10 years huff and puff. According to this understanding, four well pilot test of steam flooding has been carried out in central group in Du 229 block in June 2007. After two and a half of regulation, steam flooding pilot test achieved good results, and formed a plan of steam flooding technology dynamic control limits of ultra-heavy oil for improving the steam swept volume and prevent steam breakthrough. Du 229 block ultra-heavy oil steam flooding pilot's success, broke through the "forbidden zone" of steam flooding can not be used for ultra-heavy oil, offoring a new way for ultra-heavy oil development.