Day 1 Wed, March 15, 2023最新文献

{"title":"A Subcool Reactive ICD for Optimization of SAGD Wells","authors":"Oscar Becerra Moreno, Alex Kendall","doi":"10.2118/212774-ms","DOIUrl":"https://doi.org/10.2118/212774-ms","url":null,"abstract":"\u0000 A novel Flow Control Device (FCD) for Steam Assisted Gravity Drainage (SAGD) production wells is presented. This device increases the thermal efficiency of the process and accelerates bitumen recovery by passively increasing its flow resistance as the produced fluid's subcool decreases.\u0000 Passive FCDs have been widely employed in SAGD applications to reduce the cumulative steam/oil ratio (C-SOR) and increase bitumen production. These passive devices react to density and/or viscosity changes of the produced fluid but do not select against steam. However, the novel FCD presented in this paper reacts specifically to the subcool of the produced fluid and offers a greater restriction as the produced fluid approaches the saturation curve and attains a steam component. Computational fluid dynamics (CFD) and experimental data have been used to minimize frictional pressure loss through the FCD while inducing subcool choking in pressures and flow rates typical of SAGD wells.\u0000 Selected test data clearly shows that the novel FCD increases its resistance sharply as the subcool approaches zero and as a steam component becomes present in the produced fluid. From initial hot water testing and extensive steam testing, a mechanistic model has been developed that uses physics and geometry to predict the performance of the device under a wide variety of thermodynamic conditions. The test data and this model were fed into numerical reservoir simulators to visualize the effects of this device in a typical SAGD completion. These simulations clearly show improved C-SOR and a more fully developed steam chamber for completions that utilize this novel FCD.\u0000 The novelty of this FCD is its proactive, yet passive, means of preventing steam production in SAGD wells. By preferring more subcooled fluid – either cooler or higher pressure – steam breakthrough and hot-spotting will be prevented or controlled, downhole equipment will be protected, and the SOR will be reduced. The thorough, mechanistic model for the new FCD allows for accurate interpolation and meaningful extrapolation, along with seamless integration with reservoir simulators to evaluate deployment strategy on a case-by-case basis.","PeriodicalId":437231,"journal":{"name":"Day 1 Wed, March 15, 2023","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128599153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective Thermal Conductivity of Tight Porous Media","authors":"S. Ghasemi, Geragg Chourio Arocha, A. Fayazi, A. Kantzas","doi":"10.2118/212747-ms","DOIUrl":"https://doi.org/10.2118/212747-ms","url":null,"abstract":"\u0000 Fluid and heat flow in complex porous media is widely used in various sciences such as medicine, environmental engineering, geoscience, and petroleum engineering. Understanding flow and heat transfer is may be difficult unless the pore geometry is well understood. The focus of this study is the determination of effective thermal dispersivity by both conduction and forced convection. For this purpose, experimental measurements and simulation results of heat and momentum transfer are presented. Experiments are conducted in a sand pack with various surrounding temperatures and injection rates. A 3-D heat transfer model was developed with and without fluid flow with three components. First component is mobile or stagnant fluid in the pore space, second component is the sandstone continuous matrix, and the third component is another solid that has a separate thermal conductivity and will mimic the constant temperature boundary. The transfer of the heat through the solid and fluid and also from the solid to the fluid is related to the composition and connectivity of the solid in the geometry. However, when there is forced convection, the key factor is the Peclet number. The velocity of the fluid can change the effective thermal conductivity up to four orders of magnitude. For the experiments, a sand pack 48cm long was used at temperatures of 40 - 60 °C and water injection rates of 1 - 100 cc/min. The model is augmented by numerical calculations of heat transfer parameters such as effective thermal conductivity and effective thermal advection by monitoring the Peclet number of the process. The variability of thermal dispersion of tight systems under specific composition and pore topology was presented.","PeriodicalId":437231,"journal":{"name":"Day 1 Wed, March 15, 2023","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121587900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}