The Quantitative Study Method and Its Application to Dongdaohaizi Fracture Belt in Baijiahai Uplift,Junggar Basin

The vertical sealing ability of fault is mainly controlled by the closed degree of fault fracture and the lithology of fault filling material.According to quantitative calculation of positive stress on fault plane and shale percentage contents,the fault vertical sealing factor(Fvs) is defined as the product of normal stress on fault plane and shale percentage contents of fault filling material.The vertical sealing ability of fault can be quantitatively evaluated by the parameter.The article applies the parameter to Dongdaohaizi fracture belt on Baijiahai uplift in Junggar Basin,sets up the vertical sealing criterion for oil and gas,quantitatively evaluates the fault sealing property and analyses its control effect.As a result,it can be proved that the vertical sealing factor is an efficient index in studying the vertical sealing ability of fault.