渤海旅大油田新近系稠油油藏水平井蒸汽驱油物理模拟实验

doi:10.12108/yxyqc.20220513

岩性油气藏 ›› 2022, Vol. 34 ›› Issue (5): 152–161.doi: 10.12108/yxyqc.20220513

• 石油工程与油气田开发 • 上一篇下一篇

渤海旅大油田新近系稠油油藏水平井蒸汽驱油物理模拟实验

马奎前, 刘东, 黄琴

中海石油(中国)有限公司天津分公司, 天津 300459

收稿日期:2021-09-02 修回日期:2022-06-11 出版日期:2022-09-01 发布日期:2022-09-06
第一作者:马奎前(1971-),男,教授级高级工程师,主要从事油气田开发研究方面的工作。地址:(300459)天津市滨海新区塘沽海川路2121号。Email:makq@cnooc.com.cn。
基金资助:
“十三五”国家科技重大专项“渤海油田高效开发示范工程”（编号：2016ZX05058）和中海石油（中国）有限公司天津分公司综合科研项目“绥中36-1/旅大5-2水驱后注热机理研究及应用”（编号：ZZKY-2020-TJ-08）联合资助

Physical simulation experiment of steam flooding in horizontal wells of Neogene heavy oil reservoir in Lvda oilfield,Bohai Sea

MA Kuiqian, LIU Dong, HUANG Qin

Tianjin Branch of CNOOC Ltd., Tianjin 300459, China

Received:2021-09-02 Revised:2022-06-11 Online:2022-09-01 Published:2022-09-06

摘要/Abstract

摘要： 对渤海海域旅大油田新近系典型稠油油藏开展水平井蒸汽驱油物理模拟实验，利用长填砂管模型分析了蒸汽温度、注入速度和原油黏度对蒸汽驱油效果的影响，探讨了蒸汽驱油不同生产阶段的动态特征、温度场的变化规律以及蒸汽驱油机理。研究结果表明：①蒸汽驱油物理模拟实验采用长岩心单管模型，设置模型内径为2.5 cm，长度为50.0 cm，填砂后模型孔隙度为35.0%，渗透率为4 500 mD，设置蒸汽干度为0.7，注汽温度为250℃，注汽速度为6 mL/min，驱油效率可达82.52%。②研究区蒸汽驱油过程分为启动、稳定驱替、蒸汽突破和蒸汽剥蚀4个阶段；注、采水平井间蒸汽腔温度场扩展不均衡，水平井底部温度扩展速度快，顶部温度扩展速度慢，在启动和稳定驱替阶段温度场呈“三角形”推进模式，蒸汽突破和剥蚀阶段蒸汽腔温度场沿对角线扩展，速度减小；蒸汽驱替阶段采出程度为51.86%，稳定驱替阶段为主要的产油阶段，采出程度为39.06%。③热力降黏是旅大油田蒸汽驱油最主要的机理，高温蒸汽的剥蚀作用、蒸馏效应、微观波及效率的提高等也影响驱油效率。

关键词: 蒸汽驱油, 热力降黏, 蒸汽剥蚀, 物理模拟实验, 稠油油藏, 新近系, 旅大油田, 渤海

Abstract: A physical simulation experiment of steam flooding in horizontal wells was carried out on a typical heavy oil reservoir of Neogene in Lvda oilfield,Bohai Sea. The long sand-packing tube model was used to analyze the effects of steam temperature,injection rate and oil viscosity on the steam flooding effect. The dynamic characteristics of steam flooding in different production stages,the variation of temperature and the mechanism of steam flooding were discussed. The results show that:(1)The physical simulation experiment of steam flooding adopts a long core single tube model,with an inner diameter of 2.5 cm and a length of 50.0 cm. After sand filling, the porosity of the model is 35.0%,the permeability is 4 500 mD,and the steam dryness is 0.7. The steam injection temperature is 250℃,the steam injection rate is 6 mL/min,and the oil displacement efficiency can reach 82.52%.(2)The steam flooding process in the study area can be divided into four stages:start-up,stable flooding, steam breakthrough and steam denudation. The temperature field of the steam chamber between the injection and production horizontal wells is not balanced,the temperature at the bottom of the horizontal well expands rapidly, and the temperature at the top expands slowly. During the start-up and stable flooding stages,the temperature field presents a "triangular" advancing mode. The temperature field of the steam chamber expands along the diagonal in the steam breakthrough and denudation stages. The recovery percent in the steam flooding stage is 51.86%, the stable flooding stage is the main oil production stage,and the recovery percent is 39.06%.(3)Thermal viscosity reduction is the main mechanism of steam flooding in Lvda oilfield. The denudation of high-temperature steam, distillation effect,and the improvement of microscopic sweep efficiency also affect the oil displacement efficiency.

Key words: steam flooding, thermal viscosity reduction, steam denudation, physical simulation experiment, heavy oil reservoir, Neogene, Lvda oilfield, Bohai Sea

中图分类号:

TE345

马奎前, 刘东, 黄琴. 渤海旅大油田新近系稠油油藏水平井蒸汽驱油物理模拟实验[J]. 岩性油气藏, 2022, 34(5): 152–161.

MA Kuiqian, LIU Dong, HUANG Qin. Physical simulation experiment of steam flooding in horizontal wells of Neogene heavy oil reservoir in Lvda oilfield,Bohai Sea[J]. Lithologic Reservoirs, 2022, 34(5): 152–161.

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渤海旅大油田新近系稠油油藏水平井蒸汽驱油物理模拟实验

Physical simulation experiment of steam flooding in horizontal wells of Neogene heavy oil reservoir in Lvda oilfield,Bohai Sea

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