Exploring Study and Application on Volume Fracturing at Triassic Reservoirs Wucangbu Area

Chang 6,Chang 8 and Chang 9 oil formations which are being mined in Wucangbu area are characterized by low prosity,low permeability,low pressure,low production etc.In general,the well without fracturing always has no natural productivity.However,fracturing has been completed,there still exist some problems that hamper the oil efficient recovery such as lower single well production,rapidly declined production and unexpected situation for stable production.The paper takes examples of Chang 6,Chang 8 and Chang 9 formations that are mainly produce layers.We have drawn lessons from the advanced technical idea deals with the lower permeability and lower pressure tight reservoirs at home and abroad,combining with the practical experience of hydraulic fracturing during the process of exploration and development of WuQi Oilfield,based on the reservoir research,we make an analysis on the enhance mechanism of volume fracturing and investigate the feasibility of volume fracturing design patterns at Triassic reservoirs Wucangbu area,then explores the process design model of the volume fracturing for the Triassic reservoir.The study will be a beneficial reference for the volume fracturing performed on low permeability and low pressure tight reservoir in Wuqi oilfield.