Technology of compound fracturing in Tong47 block

The yield aim expected is not achieved in prophase fracturing of Tong47 block.Therefore,in allusion to geological properties of strong water sensitivity of reservoir,compound fracturing technology of guanidine gum and clean fracturing fluid is selected preferentially.Guanidine gum has better ability of temperature resistance and forming fissure.And clean fracturing fluid is of low pollution,strong clay expansion inhibition ability and relatively strong sand-carrying ability.In reservoir of high temperature and water sensitivity,the advantages of clean fracturing fluid and guanidine gum fracturing fluid are combined perfectly,which achieves good yield effect.Indoor experiment of system property and optimal selection experiment of field construction parameters and fracture geometric form having good yield effect are done,where construction success rate reaches 100%,that is,all wells achieves self flowing after stress.