Study on Extra-low permeability Chang 3 reservoir rational injection and production ratio and development countermeasures

Chang 3 reservoir is lithology reservoir formed by lake delta with obvious low permeability.After six years development of the area,the research on rational injection and pro-duction ratio has been made,and the technological measures as early micro facies identification,fine injection,measure for tapping potential has been carried out,which proved the successful development of the reservoir and achieved good result as:three development index continues to drop,good the water flooding and high ultimate recovery.