Research On The Horizontal Well Technology Of The Deep Volcanic Reservoir In Xushen Gas Field

Xushen gas field exploration evaluation and development dynamic show:the volcano rock reservoir has become the main natural gas stimulation in Daqing oilfield production.From the blocks that have already been submitted to the three grade geological reserves of natural gas.The physical property of the deep volcanic reservoir in Xushen gas field is poor,development only use vertical well,fracturing production of most of the gas,low production per well,poor stable yields,and some well field be difficult to use effectively.During the multidisciplinary and comprehensive study of the thesis the gas reservoir geology,3D geological modeling,adaptability evaluation of reservoir geological conditions,earthquake and gas reservoir engineering,many horizontal wells in volcanic reservoir were designed.Through exploration and research,optimization of the geology routing of the horizontal well in the deep volcanic reservoir,determine the direction of the horizontal section extends to optimize the horizontal technology.Through indoor electrical simulation experiments and theoretical calculations,we analysised the main factor of production mechanism and influencing factors of horizontal well;draw up a policy for horizontal well technology development;formed a set of adaptability evaluation of reservoir,three-dimensional geological modeling,horizontal well trajectory optimization design.The effective use of gas reservoir has laid a foundation.Up to now,more than twenty horizontal wells have drilled in Xushen gas.The gas testing and commissioning were seen obvious yield increasing effect Compared with vertical wells.Class II and III reservoir has been a major breakthrough.At the same time,the bottom water coning can be effectively controlled through the horizontal well.This means that it is feasible to develop volcanic reservoir with horizontal well technology in Xushen gas.It is expected to be the main development technology.