低渗稠油油藏蒸汽吞吐合理开发井距的确定——以叙利亚O油田为例
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摘要
以叙利亚O油田SH_B油藏为例,研究了低渗稠油油藏蒸汽吞吐开采时考虑变启动压力梯度影响的有效动用范围和合理开发井距。首先采用驱替实验测定不同渗透率、不同原油黏度条件下油相的启动压力梯度,确定启动压力梯度与流度呈幂函数关系;然后基于水平井焖井结束后,开井生产时的水平井沿程温度变化和建立的黏温关系,首次揭示了水平井沿程的变启动压力梯度分布特征。在此基础上,建立考虑变启动压力梯度的数值模型,通过数值模拟,研究低渗稠油油藏蒸汽吞吐开采时考虑变启动压力梯度的油藏有效动用范围,论证了油藏合理开发井距,为O油田SH_B油藏蒸汽吞吐开发方案编制提供了依据。
Taking the SH_B oil reservoir in O oilfield in Syria for example, the effect of variable starting pressure gradient on the effective producing radius and the rational well spacing in low permeability heavy oil reservoirs is studied. First, the starting pressure gradients of oil phase under different permeability and different oil viscosity were measured by core flooding experiments.The experimental results show that the starting pressure gradient has a power function relationship with the mobility. Then, based on the temperature calculation of horizontal well during producing after soaking and the relationship between the viscosity and temperature, for the first time, the starting pressure gradients at different positions of the wellbore are determined. On this basis, a numerical model considering the variable starting pressure gradient was established. The influence of the starting pressure gradient on the effective producing radius and the reasonable well spacing of the low permeability heavy oil reservoir was studied through numerical simulation, which provides the basis for designing the CSS development plan of SH_B reservoir, O oilfield.
Taking the SH_B oil reservoir in O oilfield in Syria for example, the effect of variable starting pressure gradient on the effective producing radius and the rational well spacing in low permeability heavy oil reservoirs is studied. First, the starting pressure gradients of oil phase under different permeability and different oil viscosity were measured by core flooding experiments.The experimental results show that the starting pressure gradient has a power function relationship with the mobility. Then, based on the temperature calculation of horizontal well during producing after soaking and the relationship between the viscosity and temperature, for the first time, the starting pressure gradients at different positions of the wellbore are determined. On this basis, a numerical model considering the variable starting pressure gradient was established. The influence of the starting pressure gradient on the effective producing radius and the reasonable well spacing of the low permeability heavy oil reservoir was studied through numerical simulation, which provides the basis for designing the CSS development plan of SH_B reservoir, O oilfield.
引文
[1]宋传真,刘传喜,徐婷,等.低渗孔隙型碳酸盐岩稠油油藏开发对策[J].石油与天然气地质,2015,36(2):297-305.
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[4]吕成远,王建,孙志刚.低渗透砂岩油藏渗流启动压力梯度实验研究[J].石油勘探与开发,2002,29(2):86-89.
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[8]曹立迎,刘传喜,孙建芳,等.低渗碳酸盐岩稠油油藏启动压力梯度研究[J].科学技术与工程,2015,15(1):215-219.
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[10]孙璐,刘月田,葛涛,等.低渗透稠油油藏水平井蒸汽吞吐开井阶段温度分布[J].断块油气田,2016,23(4):509-513.
[11]陈民锋,赵晶,张贤松,等.低渗透稠油油藏水平井极限动用范围[J].中国石油大学学报(自然科学版),2014,38(2):103-108.
[12]陈民锋,赵晶,赵梦盼,等.低渗透稠油油藏储量有效动用界限研究[J].深圳大学学报(理工版),2013,30(2):210-215.
[13]陈民锋,李晓风,赵梦盼,等.启动压力影响下确定油藏有效动用半径[J].断块油气田,2013,20(4):462-465.
[14]程林松,韩洪宝,张明禄,等.特低渗油藏考虑启动压力梯度的物理模拟及数值模拟方法[J].石油大学学报(自然科学版),2004,28(6):49-53.
[15]曹丽丽,李涛.O油田SH_B油藏储量动用状况研究[J].重庆科技学院学报(自然科学版),2012,14(3):37-38.
[16]付育璞,郑强,庞雯,等.叙利亚O油田Shiranish组碳酸盐岩储层主控因素分析[J].石油实验地质,2017,39(3):355-361.
[17]何应付,赵淑霞,刘学伟.致密油藏多级压裂水平井CO2吞吐机理[J].断块油气田,2018,25(6):752-756.
[18]张丁涌.超稠油油藏HDCS开采技术优化[J].断块油气田,2017,24(3):409-412.
[2]刘尚奇,许新伟.稠油油藏水平井热采应用研究[J].石油勘探与开发,1996,23(2):65-69.
[3]汪全林,唐海,吕栋梁.低渗透油藏启动压力梯度实验研究[J].油气地质与采收率,2011,18(1):104-l06.
[4]吕成远,王建,孙志刚.低渗透砂岩油藏渗流启动压力梯度实验研究[J].石油勘探与开发,2002,29(2):86-89.
[5]孙建芳.胜利油区稠油非达西渗流启动压力梯度研究[J].油气地质与采收率,2010,17(6):74-77.
[6]罗宪波,李波,刘英,等.存在启动压力梯度时储层动用半径的确定[J].中国海上油气,2009,21(4):248-250.
[7]陆程,王晓冬,罗万静,等.稠油油藏水平井极限井距的确定方法[J].特种油气藏,2006,13(6):61-63.
[8]曹立迎,刘传喜,孙建芳,等.低渗碳酸盐岩稠油油藏启动压力梯度研究[J].科学技术与工程,2015,15(1):215-219.
[9](美)博贝格(T.C. Boberh).热力采油工程方法[M].北京:石油工业出版社,1980:200-210.
[10]孙璐,刘月田,葛涛,等.低渗透稠油油藏水平井蒸汽吞吐开井阶段温度分布[J].断块油气田,2016,23(4):509-513.
[11]陈民锋,赵晶,张贤松,等.低渗透稠油油藏水平井极限动用范围[J].中国石油大学学报(自然科学版),2014,38(2):103-108.
[12]陈民锋,赵晶,赵梦盼,等.低渗透稠油油藏储量有效动用界限研究[J].深圳大学学报(理工版),2013,30(2):210-215.
[13]陈民锋,李晓风,赵梦盼,等.启动压力影响下确定油藏有效动用半径[J].断块油气田,2013,20(4):462-465.
[14]程林松,韩洪宝,张明禄,等.特低渗油藏考虑启动压力梯度的物理模拟及数值模拟方法[J].石油大学学报(自然科学版),2004,28(6):49-53.
[15]曹丽丽,李涛.O油田SH_B油藏储量动用状况研究[J].重庆科技学院学报(自然科学版),2012,14(3):37-38.
[16]付育璞,郑强,庞雯,等.叙利亚O油田Shiranish组碳酸盐岩储层主控因素分析[J].石油实验地质,2017,39(3):355-361.
[17]何应付,赵淑霞,刘学伟.致密油藏多级压裂水平井CO2吞吐机理[J].断块油气田,2018,25(6):752-756.
[18]张丁涌.超稠油油藏HDCS开采技术优化[J].断块油气田,2017,24(3):409-412.