Horizontal Well Drilling Technology Research For Daqing Deep Conglomerate Layer

For expanding rift is larger in northern songliao basin fault depression,deep natural gas expanding area reservoir type is rich,deep in different strata exist dense sandstone and glutenite,volcanic rock,granite and metamorphic rock weathering crust and so on five big kind of reservoir.Rift zone sandstone and glutenite of edge is favorable reservoir,fault depression zone within the volcanic reservoir is one of the most important.At present,the deep gas reservoir is one of the main exploration targets in daqing oil field.Since 2000,the application of underbalanced drilling technology deep volcanic rock fracture gas reservoir breakthrough of exploration and development,various industrial air flow well.However,breccia under the denglouku group because of the large buried depth,strong diagenesis and generally contains tuffaceous,poor physical property as a whole,gas reservoir connectivity is poor,most of the reservoir for the low abundance reservoir,more than 6%below the lower limit of porosity,density 2.50 g/cm3,vertical Wells purpose layer bare area is relatively limited.In recent years,the periphery of the curvature radius horizontal Wells in daqing oil field in the thin poor reservoirs of low abundance oil fields has been applied,in,shallow horizontal well drilling technology already quite mature,and achieved good development effect.On reservoir protection,has been to porosity of sandstone gas layers,sandstone and fractured reservoir of volcanic rocks gas reservoir damage mechanism and protection measures to carry out the research,but there is no research work to the protection of conglomerate gas layers.However,because of daqing oil field of deep high geothermal gradient,hard formation,high level of rock drillability value,deflecting,tool selection and regional stratigraphic characteristics such as easy peeling and the difficulty,as one of improve the single well production and recovery technology of horizontal well technology in deep has not been carried out.Therefore,it is necessary to carry out damage and protection and research of conglomerate gas layers,deep conglomerate,horizontal well drilling technology research is the development of deep conglomerate gas reservoir to provide a new technical means,improve the level of deep horizontal well of daqing oil field drilling technology.The project test in 2 Wells,Sheng 1 deep horizontal well,Xu 1 deep horizontal well,.Try gas forecasting production of horizontal Wells is equivalent to 3.5 times that of vertical well the construction of a horizontal well is equal to the drilling of 3.5 production of vertical Wells.Horizontal well drilling cost about 147.34 million yuan/m,which is 2.51 times that of vertical Wells 58.7 million yuan/meters that construction of a horizontal well is equal to the drilling of 2.5 vertical well drilling cost.So,on the basis of the experimental results show,drill a horizontal well can drill a vertical Wells,less construction deep ping 1 well,deep 1-xu ping 1 well of two horizontal Wells,drilling two less 4000 meters deep vertical Wells,balance drilling cost 46.96 million yuan.The project investment of 7.66 million yuan,output 46.96 million yuan,39.3 million yuan in economic returns.Ratio of input and output:766/3930 = 1:5.13.After completion of the project research content,we can form a set of suitable horizontal well drilling technology for daqing deep conglomerate layer,daqing deep horizontal well drilling technology will be fully improved.