In China,crucial advance was obtained in experimental technologies of natural gas development.Five technical series were constructed,namely,core sample preparation,tests on reservoir physical properties and core pore-throat structure,evaluation on reservoir sensitivity,study on fluid occurrence and gas-water seepage characteristics,and physical simulation on gas reservoir production.Experimental methods and apparatus for 1D,2D and 3D system-matching physical simulation were developed to accomplish the assessment on in-house reconstruction of gas reservoir geology,reproduction of gas reservoir production pattern,and analogue simulation on the whole process of gas reservoir development,in order to provide the conditions and safeguard for fundamental research on gas reservoir development.Over ten thousand times of basic experiments and tests on more than ten gas fields of five inland basins in China were completed by nearly two decades of continuous basic experiments and theoretical studies.Systematic understandings on reserve production mechanisms for low-permeability,water-bearing and tight sandstone reservoir and development mechanisms for water control in water-bearing gas reservoir were formed to establish theoretical basis for high-efficiency development of gas fields in the Ordos Basin,Sichuan Basin and Songliao Basin.At present,the dilemma of both discovery difficulties of good-quality resources and widespread difficult production of water-bearing reserve occurs in Chinese gas field development.Enhanced gas recovery is a key guarantee for continuous production addition or steady production.Based on current gas development experimental technologies,it is necessary to further accelerate new EGR experimental technologies and strengthen the combination of in-house experiments and in-field tests to promote fundamental theory study to field application and practices.
natural gas developmentbasic theoryphysical simulation experimentenhanced gas recovery(EGR)application practice
维普
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