PipePhase高级培训教程-2.pdf
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1、1 PipePhase高级培训第二部分: 段塞流和清管的计算 PIPEPHASE Slug and Pigging Models 秦云锋秦云锋 M: 159 2100 6157 E: 2 持液量和持液率 IPS Confidential 有关两相流的定义 L A G A ? 持液量 ? 持液率 ? 无滑移的持液率(vL= vG) ? 实际体积分率流量分率 H A AA L L LG = + H q qq LNS L LG = + V = VG+ VL A = AG+ AL 4 持液率的算例 ?Total Liquid Holdup为整个Link中液塞的总量。 ?ACM表示Actual Cub
2、ic Meter Name Devi ce Type Devi ce Seg No Slip Liquid Holdup Slip Liquid Holdup Total Liquid Holdup Name Devi ce Type Devi ce Seg No Slip Liquid Holdup Slip Liquid Holdup Total Liquid Holdup ACMACM P016PIPE Seg 60.0000.0000.000 P016PIPE Outle0.0000.0000.000 B006BEND Inlet 0.000 B006BEND Outlet 0.000
3、 P023PIPE Inlet 0.000 P023PIPE Seg 10.0000.0180.232 P023PIPE Seg 20.0000.0260.575 P023PIPE Seg 30.0000.0331.005 P023PIPE Seg 40.0010.0391.511 P023PIPE Seg 50.0010.0442.085 P023PIPE Outle0.0010.0492.644 Holdup and Velocity Report - Base CaseHoldup and Velocity Report - Base Case Seg 5的液体总量0.559339271
4、341827 m3 液相面积0.012693752 m2 管道横截面积0.259309724 m2 持液量0.048952085 H A AA L L LG = + = 2.644 - 2.085 = (2.644 - 2.085)/Seg5的长度= 1/4 * Pai * ID2 ID= 574.6 mm; Seg 5 = 44.064 m 5 流型图 IPS Confidential 6 Taitel-Dukler-Barnea流态图 Flow Pattern Map ?图形随倾角变化而不同 1.00 0.10 0.01 10.0 75.0 0.11.010.0900.0100.0 Int
5、ermittent Annular Stratified Wavy Stratified Smooth Bubbly vSL(ft/sec) vSG(ft/sec) Fluid Flow Basics Slug Analysis Duns and Ros 流态图 ? 仅适用于竖直管线 NGV 1 110 10 -1 10 2 10 -1 10 3 10 10 2 NLV Bubble Flow Plug Flow Slug Flow Region I Region II Froth Flow Region III Transition Mist Flow Ansari 流态图 1 110 10
6、 -1 10 2 10 -1 10 10 2 Superficial Liquid Velocity (m/s) Superficial Gas Velocity A C B D D BARNEA TRANSITION BUBBLY DISPERSED BUBBLE SLUG OR CHURN ANNULAR 竖直向上 9 如何在报告中查看? ?Demo-VerticalFlow TDB流型图 Corr Name Devi ce Type Device Seg Flow Regime Corr / T-D Name Devi ce Type Device Seg Flow Regime Cor
7、r / T-D E001EXPA Inlet - - E001EXPA Outlet DIST ANNU B001BEND Inlet - - B001BEND Outlet INTR ANNU V001VALV Inlet - - V001VALV Outlet INTR ANNU P001PIPE Inlet INTR ANNU P001PIPE Seg 1 SLUG ANNU P001PIPE Seg 2 SLUG ANNU P001PIPE Seg 3 SLUG ANNU P001PIPE Seg 4 SLUG ANNU P001PIPE Seg 5 SLUG ANNU P001PIP
8、E Outlet SLUG ANNU Duns and Ros 10 段塞流分析 IPS Confidential 11 段塞流分析模型 PIPEPHASE Slug Analysis Modeling ?Link Summary中清管球生成体积 Sphere Generated Volume in Link Summary ?TDB流型图 Taitel-Dukler-Barnea Flow Regime Map ?段塞可能性报告 Slug Probability Report ?清管球模型和报告 Sphering / Pigging Model and Report Slug Analysi
9、s 12 Sphere Generated Volume ?Link Summary中的Holdup 整个Link中液相总量(平均条件平均条件) ?基于Slip Holdup计算的清管生成体积 在出口条件下出口条件下闪蒸算出的Link中总液相量 ?基于(HL-HLNS)计算的清管生成体积 考虑气液相滑移,在Link中的液相在出口条件下闪蒸的结果 is the volume of the liquid staying back in the link due to the slip between the phases, flashed at the outlet conditions of t
10、he link. ?如果Link清管: 实际液塞体积在基于HL和基于HL-HLNS计算的液相体积之间 前者为上限、后者为下限 Slug Analysis 13 LINK SUMMARY RATE, PRESSURE AND TEMPERATURE SUMMARY - FROM(F) AND TO(T) -ACTUAL FLOW RATES*-PRESS: -HOLDUP*- LINK NODE GAS OIL WATER PRESS: DROP TEMP: GAS LIQ (MMCFHR) (CFHR) (CFHR) (PSIA) (PSIA) (F) (MM (AFT3) SCF) - -
11、- - - - - - - - LINK Q012(F) 0.03366 79.26 0.00 350.0* 120.0 SINK(T) 0.04176 119.50 0.00 253.5 96.5 67.1 0.3575 949. SPHERE GENERATED VOLUME (BASED ON HL) = 941.0 SPHERE GENERATED VOLUME (BASED ON (HL-HLNS)= 885.1 * - INDICATES KNOWN PRESSURE * REPORTED VOLUME AT 14.7 PSIA AND 60 F (GAS ONLY) * RATE
12、 REPORTED AT ACTUAL TEMPERATURE AND PRESSURE CONDITIONS Link Summary Report Example Slug Analysis 14 Taitel-Dukler-Barnea流态图 Flow Pattern Map ?预测流态 应和Slug Report共同使用 Allows the engineer to determine the flow regime in the pipeline. This in conjunction with the slugging report can improve his confide
13、nce in the simulation results. ?如果流体图预测出段塞流,则需要仔细 查看Slug Report If the flow pattern predicts slug flow, then the results of the slugging report can be taken very seriously. ?而如果流态图没有预测出段塞流,则一 般无需再看Slug Report On the other hand, if the flow pattern predicts stratified flow, then the slugging report c
14、an be largely ignored. Slug Analysis 15 Taitel-Dukler-Barnea流态图 Flow Pattern Map ?图形随倾角变化而不同 Maps change according to orientation angle 1.00 0.10 0.01 10.0 75.0 0.11.010.0900.0100.0 Intermittent Annular Stratified Wavy Stratified Smooth Bubbly vSL(ft/sec) vSG(ft/sec) Fluid Flow Basics Slug Analysis
15、16 PipePhase如何预测段塞流? ? PipePhase稳态模型中有三个基于统计学的模型: Brill、Scott、Norris,但使用有前提: 只对一个Link的模型中生成该报告(一个Source和一个Sink的 模型) 流体处于两相流; 最后一个单元是Pipe; 该模型预测的是自然段塞流,对由于地形导致的段塞流和强烈 段塞流不能预测,需要TACITE瞬态模块; 17 段塞可能性报告Slug Probability Report ?在GeneralPrint Options中将 Link Slug Report选上 Turn on the Link Slug Report featu
16、re under GeneralPrint Options ?三种方法 Brill NORRIS SCOTT ?结果在Slug Sizing and Slug Delivery Model Report中显示 Results reported in the Slug Sizing and Slug Delivery Model Report Slug Analysis 18 关于三种段塞流计算方法 ?BRILL 最早的方法 假设段塞流的大小是流体流速和管径的函数 用BRILL方法预测段塞流大小并用SCOTT方法预测段塞流的 发展 ?NORRIS Exxon公司开发的 假设段塞流大小仅仅是管径的
17、函数 用NORRIS方法预测段塞流大小并用SCOTT方法预测段塞流 发展 ?SCOTT SCOTT本人的博士论文 和NORRIS方法相同但增加了段塞发展的概念 用SCOTT方法预测段塞流大小及其发展 19 Slug Report的应用 Slug Report Application ?所有方法仅对管线倾角在5度范围内比 较好,并且仅适用于自然段塞流 All options are only good for elevation changes within 5 degree horizontal and just for natural slugging ?这些模型均不检测管线是否存在段塞 T
18、he statistical slug model does not check if slug flow conditions exist in the pipeline or not. ?用户自己通过TDB流态图判断 The user needs to independently check if slugging conditions do exist (use the Taitel-Dukler-Barnea flow pattern map). ?如果存在段塞则预测其长度 It predicts slug sizes if slug flow was occurring. Slug
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