PipePhase多相流管网模拟软件中文用户手册 1
PipePhase 高级培训班胜利油田工程设计咨询公司
秦云锋
M: 159 **** ****
E: yunfeng.qin@https://www.wendangku.net/doc/a012428031.html,
内容
热力学方法和物性计算
–黑油物性计算
–单相液体物性计算
–单相气体物性计算
–凝析油物性计算
–蒸汽物性计算
–组分模型和热力学方法的选择
–石油蒸馏数据的处理
–水化物的计算
段塞流和清管的计算
–流型的确定
–TDB流型图
–段塞流的计算
–段塞流报告
–清管球的计算
其它技巧
–管件压降的计算
–管网的收敛问题
–压降计算模型的选择
PipePhase高级培训第一部分
物性计算与热力学方法PVT Calculation and Thermodynamic Data
Thermodynamic Data
非组分模型
Non-Compositional Models
每个相需要定义密度
Requires density (gravity) of each phase
其它物性通过经验方程计算
Empirical correlations for physical properties
–粘度Viscosity
–压缩因子Compressibility factor (z-factor)
什么是黑油（Black Oil）模型？
黑油模型是行业常用的多相流模型
–通过油气水比重和在标况下气液相体积比来计算流体性质
–实际工况下的气液相比则通过关联模型计算
–气液相性质则分别通过其关联模型计算
黑油模型假设条件
–在标况下的液相在所有条件下均保持液相
–标况下分离出的气相则可以气相和溶解在液相两种方式存在
–通常对API<45的原油适用
黑油模型
Black Oil Model
输入数据Input data
–油气水三相密度
Oil, gas, and water density (required)
–两点粘度
Two-point liquid viscosity (optional)
–气相杂质
Gas contaminants: N 2, CO 2, H 2S (optional)
适用范围：
–油气水三相
–油气两相（water cut=0）–油水两相（气油比=0）
黑油流体性质
溶解气油比Gas/Oil Ratio
油地层体积系数Oil FVF
压缩因子Z-Factor
油的粘度Oil Viscosity
粘度混合计算Viscosity Mixing
油水混合计算Oil/Water Mixing
调整油水混合Adjust Oil/Water Mixing
溶解气油比SGOR
Solution Gas/Oil Ratio
定义
–地层油在一定温度和压力下进行脱气，脱气后计算在该压力下单位体积地面油所溶解天然气的标准体积。
The solution gas-oil ratio is the volume of dissolved gas, expressed at standard conditions, per unit
volume of stock tank oil, at a given condition of pressure and temperature.
–SGOR随压力增大而增大，直至所有气相溶解在油中达到泡点压力。
This ratio increases with pressure until all of the gas dissolves at the bubble point pressure.
计算关联式
Correlations
–Lasater
–Standing
–Glaso
–Vazquez－缺省
PVT Correlations
Lasater Correlation
用于API>15的油
Use for API > 15
和Vazquez方法一起计算FVF
Use with VAZQUEZ for FVF
基于加拿大、美国西部和中部、南美的黑油数据
Based on blackoils from Canada, the Western and Mid-Continental US, and South America 与实验对比的准确性7％
Experimental accuracy was 7%
用于API<15
Use for API < 15
基于加州气相－原油系统Based on California gas-crude systems
实验数据对比准确性10% Experimental accuracy was 10%
更新更通用的关联式－缺省Newer and more general than the Lasater and Standing correlations
和Vazquez关联式类似
It is similar to Vazquez correlation
基于欧洲不同油田原油数据And was based on crude oil data from a different set of fields in Europe.
PVT Correlations
油层体积系数
Oil Formation Volume Factor (FVF)
Definition
–实际工况下油气体积除以脱气后油在标况下的体积比The oil formation volume factor is the in situ volume of the oil phase, comprising of both oil and
dissolved gas, that is occupied by a unit volume of oil at stock tank conditions.
–FVF受油中溶解气相的量和油的可压缩性影响
The formation volume factor is influenced by the amount of dissolved gas as well as the
compressibility of the oil.
–低于泡点压力，FVF随压力升高而增大
Below the bubble point pressure, the oil formation volume factor increases as more gas dissolves with increasing pressure.
–高于泡点压力，FVF随压力升高而降低
Above the bubble point pressure, the formation volume factor decreases with pressure due to
compressibility effects.
PVT Correlations 气相压缩因子
Gas Compressibility Z-Factor Correlations
两种方法：Standing-Katz7和HY。
Two choices between the Standing-Katz7 (default) and Hall-Yarborough7 (for wet or dry gases) correlations
Standing-Katz的数据取自天然气，其结果严重依赖比重数据的准确性。可考虑有杂质。
data were taken from experiments with natural gas only, and the resultant z-factor
accuracies are strongly reliant on a precise specific gravity entry,is also able to correct for the existence of contaminants such as nitrogen, carbon dioxide, or hydrogen sulfide.
HY方法对Standing数据进行曲线拟合The Hall-Yarborough methods for dry and wet gases result from curve-fitting original
Standing-Katz data, and are also able to correct for the existence of contaminants.
将压缩因子描述为比重、温度和压力的函数Both methods correlate z-factor as a function of specific gravity, temperature and pressure.