Integrated Approach of Sealing Properties of Fault in Complex Fault Block Oil-Gas Field-An example of the lower member of Sha-2reservoir in Yong'an oilfield

It is significant effect of study in g the fault sealing properties,(i.e.lateral sealing factors such as filling compounds,allocated lithol-ogy of fault walls and syn genetic fault feature;a nd vertical sealing factors including the fault mechanics,geometry,stress fiel d,faulted overly-ing strata)on determi nation of the distribution of reservoi rs in complex fault block.The block sealing is not simply depen dent on the li thology of fault walls,but on the property of fault zones.This paper presents an integrated approach of block sealing analysis with applicability and practic abili ty.From the studies of oil-water contact in reservoir on two sides of t he fault,acoustic logging data from over-fault wells and shale smear factor(F ss ),the sealing status of fault is comprehensively estimated.A case is used to demonstrate the good effectiveness for ascertain-ing the lateral and vertic al sealing properties of the faults by applying this approach.