Application and Prospect of Fluid Mobility in Oilfield Development
The study on fluid mobility in micro-pore-throat is of great significance for accurate evaluation and efficient de-velopment of the reservoir,and it is also the necessary basis for enhanced oil recovery of oil-gas reservoir.According to the differences of research objects,the research methods of fluid mobility in pore throats are divided into three dimensions:mineral composition,pore structure and fluid production.NMR technology can quickly and accurately determine the commonly used movable fluid parameters such as movable fluid saturation,movable fluid porosity and irreducible water saturation,and then effectively evaluate and predict the productivity of various oil and gas reservoirs.At present,the major oil fields at home and abroad have adopted the method of combining NMR with other experimental means to determine the production law of fluid in the reservoir,and have achieved good application results in different types of reservoirs such as tight glutenite,carbonate rock,coal seam and oil shale.In addition,in order to achieve effective exploration and development of different types of oil and gas resources,it is necessary to clarify the control factors of fluid mobility in the reservoir.Based on the existing research results,the control factors of fluid mobility can be divided into macro and micro aspects.The macro factors include sedimentary environment,diagenesis and lithofacies type,while the micro factors include pore throat structure,reservoir physical properties,mineral composition,water film thickness and other factors.At present,although the research methods of fluid mobility have been abundant and have achieved good application results in the evaluation of different types of oil and gas resources,further research and exploration are needed for greater accuracy and wider coverage in its application.In the future development,new ideas and methods such as pore network model,reservoir numerical simulation,multi parameter evaluation index,simultaneous geochemical parameters and so on can be comprehensively applied so as to deeply reveal the percolation mechanism of mov-able fluid in the micro-pore-throat,and continuously improve the accuracy of comprehensive evaluation of movable fluid,to provide geological basis for the rational formulation of reservoir development plan,and to promote the efficient development of the petroleum industry.
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