Dense Oil Displacement Study Combined With NMR

For dense oil reservoir water drive development of more and more become an important source of oil and gas,this article selects the typical kinds of dense core,test of core permeability and porosity basic physical property characteristics of clay minerals,combined with the NMR and centrifugation test movable fluid saturation,combining with the pore size distribution of constant speed mercury intrusion method,centrifuge method was used to study the water displacement efficiency,achieved good results.Comparison in different areas the movable fluid content and distribution of dense reservoir characteristics,analysis of movable fluid and the correlation of porosity,permeability and the content of clay minerals,studies the influencing factors of movable fluid saturation,the future of dense reservoir of NMR in different parts of the movable fluid research provides a theoretical basis.Constant speed mercury injection method is used to get the pore structure parameters combination of nuclear magnetic resonance T₂ spectrum,by converting T₂relaxation time distribution of pore size distribution method,and the converted aperture distribution compared with mercury intrusion pore throat size distribution,verify the feasibility of the method,in order to further study between partitions within the pore movable fluid and fluid provides data support.Combining with the oil displacement efficiency of NMR and centrifugation,gas centrifuge and water centrifugal two experiments respectively,comparing the experimental results,the partition between statistics,movable oil saturation of remaining oil saturation and oil displacement efficiency.Combined with the actual oilfield development data,the factors that influence the experimental results are analyzed to provide theoretical support for further water injection development in the oilfield.