Parameter Optimization And Effect Evaluation Of Repeated Volume Fracturing In Vertical Well In W Area

With the continuous exploitation of low-permeability reservoirs in Xinjiang,the output of many old blocks has dropped significantly.Under the existing water injection development mode,conventional fracturing is difficult to further improve the development level,and it is urgent to explore new ways to improve the development efficiency of such reservoirs.The pressure of the formation pressure in the X group reservoir in W area is obvious,and the production is difficult.The initial output is high,the decline is fast,and the water content continues to rise.In the past,the conventional fracturing process was adopted,the construction displacement was low,and the construction scale was small.Aiming at the problems existing in the development of target blocks,the repeated volume fracturing research of vertical wells was carried out: the geological characteristics of the reservoirs and the production dynamics were analyzed,the wells were selected by repeated volume fracturing,the parameters of repeated volume fracturing cracks were optimized,and The fracturing material is preferred to achieve the desired effect of volumetric fracturing.The field experiment was carried out using the designed repeated volume fracturing optimization scheme,and the preliminary results were obtained,which provided a new model for the development of the old well difficult to use reservoir,which has important reference for the economic and effective development of low permeability/extra low permeability reservoirs.