The Experimental Study Of Hydraulic Fracturing Control Fracture Height Of Bottom Water Reservoir

In the development of bottom water reservoir,there may be put through the end of thebottom water while conventional hydraulic fracturingcause water channeling,therefore,we needto control the fracture height.Among all the methods to control bottom water reservoir hydraulicfracture height containment,the technology of artificial barrier to control fracture height iseffective and widely applied.Whereas,the present investigation of fracture height controltechnology by placing an artificial stress barrier is primarily focused on principle analysis of theconcept and numerical simulation,so it is necessary to carry out theory analysis systematicly,andit is necessary to performance evaluation and optimize the sinking divertint of controllingfracture height and carrying fluid.Firstly,analysis the mechanism of controlling the fracture height by artificial barrier,dicussthe settlement rule of sinking divertint in the cracks,analysis the influence of the concentration ofsettlement divertint and the viscosity of carrying liquid through software simulation,and givesthe requirements of the sinking divertint.Secondly,evaluate the performance of sinking divertint’s carrying fluid,measuring theviscosity-temperature resistance,broken plastic,surface tension,the residue content and particlesize of carrying liquid by laboratory experiments,the results show that the concentration of0.4%guar gam carrying liquid’s performance works well.By measuring the different sinkingdivertint’s sedimentation rate of sinking divertint,sealing properties and conductivity,ultimatelypreferred the TC-1quartz sand as control of fracture height growth sinkingdivertint,sedimentation velocity is0.97mm/s,the filtration coefficient is7.42×10-4m/min1/2,helpsto control fracture height.Finally,according to the reservoir of Yan9,Yan10in Wuqi oilfield,it has bottom waterproblems,optimizing and designing the parameters of controlling fracture height growth.throughsoftware simulation shows that the perforation location at the upper part of reservoir couldensure the crack extends in producing layers.By combining of theoretical calculation andconstruction experience,the injection rate of0.5~0.8m3/min could control the fractureheight.Through the theoretical calculation and experimental simulation,when the concentration is 10%~15%.could form an effective artificial barrier.According to the laboratory test results,conducted2wells field test,and succeed,achievedgood yield.It is showed that the results of this study have guidance significance for thedevelopment of bottom water reservoir.