Establishment of Electrical Standard to Judge the Effective Thickness in P Oil Formation in J Oilfield in Hailaer Basin

The geological structure is extremely complex in the J oilfield in hailaer basin,China.The reservoir zones are various.The lithology is mainly composed of sandstones,sandy conglomerates,tuffaceous sands and sedimentary tuff.Besides,the physical property in the reservoirs is always changing.As a result,it's quite difficult to exactly divide and evaluation the reservoirs with conventional logging data.Taking the geological features of the study area into consideration,the lower limit standard of the physical property in different reservoir by using,formation test method,experiential statistical method,oil-bearing occurrence method and other methods is identified.What's more,on the basis of the lower limit standard,the electrical standard is established to divide the effective thickness of reservoirs by carefully choosing those logging curves that are sensitive to the lithology,the physical property and the oil bearing property.This is definitely to improve the logging interpretation accuracy on the effective thickness in this area,which consequently contribute to developing the oilfield.