Application Of Well Test Method For The Inclined Well In X Wellblock

Y group oil deposit in the X well area is a large-scale nasal structure sheltered by two reverse faults.It has no edge or bottom water and the type of the reservoir is structural lithologic reservoir which is sheltered by faults.Part of the wells in the X area are inclined ones.Synchronous waterflooding is usually used,but the poor extraction effect,the considerably decreasing production from the initial stage to current,the rapidly rising rate of water content,the position of water injection front-edge,oil well pollution,water injection pollution,permeability changes and changes of formation pressure distribution are still urgent problems which need to be solved..In view of such problems,it is of great significance to carry out in-depth research on the efficient exploitation..First of all,the study of inclined well test has been done to obtain the inclined well data by the method of straight well model processing.Secondly,the dynamic monitoring data on the injection wells and production ones were collected and sorted out.The waterflooding front were studied by means of well test method and two-phase percolation theory(Beckley-Levitt)and the results studied of the two methods were compared,moreover the change rules of waterflooding front was comprehensively analyzed.Thirdly,the reservoir pollution was studied with the well test interpretation method,and the total interpretation epidermis of the well test was decomposed.The deposit true skin of the deposit pollution,the permeability of the pollution zone,the pollution radius as well as pollution status of Y group oil deposit in the X well area.In addition,the change rules of permeability and the change of formation pressure at Y group oil deposit in the X well area were studied.Through the study in this project,the study methods of inclined well test were obtained,and the waterflooding front,pollution condition,permeability change rule and pressure distribution status at Y group oil deposit in the X well area was known,which lays a foundation for the follow-up high efficient waterflooding and development of this oil deposit.