Study On The Application And Forecast Of Reservoir Fracture Of C5 Area In Low-Permeability Oilfield

A Oilfild is a low-permeability fractured reservoir,the existence of fractures aggravates the aeolotropism of the reservoir, it also effects the distribution of remaining oil and the establishment of oilfild development plan.so establishing a technique to forecast,characterize fractures,raveling the developed characterizion of fractures are valuable for enhancing the oilfild development effectiveness.Based on the core anylysis,well logging,seismic and dynamic data,this article studied the Application and forecast of reservoir fracture.The tectoclase are developed in the regain of interest,trending nearly NS and nearly WE.the WE fractures are open as the NS fractures are closed.The fracture mechanism study shows that the lithology,thickness and assemblage of the reservoir layers are the internal factors for thedevelopment of fractures, while the tectonic movement is responsible externally. Vertical and sharp angled fractures are dominated in the sandstone, while bedding fractures are formed in the mudstone.The fractures in the sandstone are characterized by low microspherically focused resistivity and high acoustictime.we adopted fracture types assembling-point to point monitoring techniques to characterize fractures,the characterizing results are well characterize to the core anylysisand dynamic data..Under control of the studies on correlation between fractures developing and fault throw,flexural strength, seismic data,the fracture intensity model about the regain of interest was builded.After it,the fracture discrete model was builded to characterize fractures by three-dimensional space..By means of the dual porosity numberical model,it has quantified the remaining oil and optimized the oilfild regulate plan.it is expected that the recovery can be raised.