| Low permeability oil and gas reservoirs in China have great development prospects,and low permeability oil and gas reservoir resources are the most realistic field of unconventional oil resources,and is also the most important exploration area of oil exploration and development in the future.With the continuous improvement of technology innovation,engineering geological understanding and management,China's oil industry will continue to develop rapidly in the direction of the low permeability reservoir,making a significant contribution to the protection of national oil and gas energy security.First of all,from the perspective of different well types,mainly diamond shaped nine point well pattern about vertical wells and five point well pattern about horizontal wells,this article compares and analyzes the displacement law of the two;Secondly,from the perspective of different development methods,mainly the failure development and water injection development.Based on the theoretical model and the parameters of the dissolved gas to oil ratio,draw the chart of different dissolved gas oil ratio,compare and analyze the effective displacement law;Then,from the perspective of different development stages,consider the start-up pressure gradient and medium deformation,establish dynamic inflow models of vertical wells and horizontal wells about single-phase flow,oil-water two-phase flow,oil-gas two-phase flow and oil gas water three-phase flow;Finally,combined with the actual production situation of the typical block BMN and Y284 in Changqing Oil field at present,analyze the dynamic production of vertical well and horizontal well,effective displacement rule,put the reservoir properties into the inflow dynamic models,then draw IPR curves about multi phases flow,and present the reasonable bottom hole pressure according to the IPR curve.It has great guiding significance for the development of low permeability reservoirs. |
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