A Study On Low Fluctuation Pump By Using Hydraulic Filter

With the massive exploitation of conventional oil and gas,oil and gas resources are gradually consumed,and unconventional oil and gas has gradually become a hot spot in oil and gas exploration and development.Among them,tight oil is a more realistic field in unconventional oil and gas exploration.Therefore,It is especially important to look for its sweet spot.On the basis of previous research,this paper comprehensively analyzes the core photos,logging data and physical property data of the Nanpi slope in the Cangdong Sag,and analyzes the sedimentary characteristics,reservoir development characteristics and tight oil enrichment factors of the second member of Kong 2 in the study area.And use multi-factor superposition analysis to evaluate and predict the sweet spots in the study area.The study shows that the study area mainly develops sedimentary microfacies such as braided river delta underwater distributary channel and mouth bar.the rock types are mainly feldspar sandstone and lithic feldspar sandstone,and the interstitial materials are mainly clay and calcite.Dissolution pores and residual primary pores are the main pore types.The average porosity is 9.05% and the permeability is 0.74 m D.Sedimentary reservoirs are the main factors for tight oil enrichment,among which the underwater distributary channels with well-sorted sand bodies are high-quality tight reservoir development areas,and the oil layers are relatively thick.Diagenesis controls the physical properties of the reservoir and further affects the development of the oil layer.Early compaction and cementation lead to low porosity and low permeability of the reservoir,resulting in the densification of the early reservoir.The development of the clay film inhibits the secondary growth of quartz and protects the seepage channel.Strong dissolution promotes the development of secondary pores,thereby improving the physical properties of the reservoir.The study area can be divided into type I sweet spot area,type II sweet spot area,and type III sweet spot area.The type I sweet spot area is dominated by underwater distributary channels,the porosity is above 12%,the permeability value is above 0.75 m D,and the thickness of the oil layer is high.More than 15 m,the residual intergranular pore phase develops optimally.