Feasible Research Of Using Horizontal Well For Tight Oil At Chang7

In recent years,the global resource consumption has soared.The energy that was produced in conventional oil and gas field was insufficient,therefore development of unconventional energy is particularly important.there is a mass of tight oil in the world and it is one of unconventional energy.we had found tight oil about 35.5~40.6×108t in chang7 of Ordos Basin but the permesbility only was 0.1mD and porpsity is less than 10%.For difficult development of tight oil and the problem of low recovery efficiency we study the feature of tight oil and use the technology of 3D modeling and numerical modeling combining with the typical case of using horizontal well to analyze the feasibility of using horizontal well in the development of oil.Results show that the tight oil of chang7 ues horizontal well at the same time combines with horizontal section is 800 m long and half length of fracture is 300 m.there will produce tight oil about 3×105m3 and the recovery rate of oil filed was 11.80%.the recovery factor is about two times of using the vertical Wells or directional well.so the horizontal well development of tight oil is feasible.The conclusion is significance.for us to development tight oil...