Research On Percolation Mechanism And Development Mode Of Tight Reservoir

At present,tight reservoir development faces the following problems: 1)in the study on pore structure of tight reservoir,mainly concentrated in the laboratory physical simulation study,and most of the studies are based on low permeability and extra low permeability reservoir properties,not only the true nature and the tight reservoir and there is a deviation,and the conditions for the development of the oilfield is far from.Therefore,it is necessary to quantitatively study the effect of pore structure of tight reservoir on the seepage flow,and establish a comprehensive calculation method of various forces,which provide the foundation support for the analysis of the mechanical characteristics of tight reservoir seepage.2)at present,the development of tight oil reservoir has gradually entered the stage of large-scale,"factory" development mode has become a new hot spot."Factory" development is the main way of the exploitation and utilization of the elastic energy reservoir itself,the effect is applied to the dense reservoir is not the same,the same application development in different field conditions facing different challenges.Therefore,it is necessary to carry out the research of the numerical model of the failure mode in the development of tight reservoir with elastic energy,and put forward a method to predict the productivity of tight reservoir.3)with the continuous development of tight reservoir at home and abroad,the inevitable emergence of production decline,production decline,so it is necessary to improve oil recovery method for tight reservoir research.At the same time,because of the particularity of the tight oil reservoir,so the ordinary provided method is applied to dense reservoir must be adjusted and optimized,the applicability of the evaluation method to establish the dense reservoir provided way,given different restrictions provided mining method.Firstly,the multiphase flow model with boundary layer in tight reservoir is improved.Quantitative evaluation of the effect of water film on the water film of the dense reservoir water wetting nano pore Vander Ed Ley,electrostatic force and structure force,put forward that the electrostatic force is the key to influence the thickness of the water film;Secondly,the productivity evaluation method of the long horizontal well in the tight oil reservoir is established.It points out the limitation of the current well testing model and software,including the difficulty of describing the back line features,the ideal model of the well and the description of the actual sewing network.;Then on the basis of laboratory experiments,the adaptability evaluation method of reservoir is put forward.The factors affecting the production capacity and its influence degree are presented,and the mechanism of the successful development of the "well factory" is revealed,and the conditions for the development of tight reservoirs in China are not suitable for the well being.The following main innovations are obtained:Quantitative evaluation of dense reservoir water wetting Vander Ed Ley,static electricity and nano pore structure of water film effect,proposed the static electricity is the key to understanding the influence of water film thickness,and the quantitative comparison in larger pore radius;the well testing model and software limitations,including anti feature description well,the model is too ideal,the actual situation is difficult to describe the fracture network;put forward the tight oil well factory reservoir adaptability evaluation method.It reveals the mechanism of the successful development of the "well factory" in foreign tight reservoir,and puts forward the conditions for the development of tight reservoir in our country.