摘要
气顶砂岩普通稠油油藏具有油稠、储层疏松的特点,复杂油气水关系直接影响了油田的开发水平。通过分析乐安油田草31断块气顶砂岩普通稠油油藏地质背景和三角洲沉积特点,将Es311-2两个小层作为一套层系开发。结合草31断块单井试采生产情况,总结了油区和气顶变化规律,研究了沙三段储集层的开发井网分布特点和井距,论述了注水开发的可能性。开发实践表明,应用多种防砂配套技术和螺杆泵携砂冷采工艺,控制单井合理产油量和合理采油速度,将获得较高的一次采收率,取得良好的开发效果。
Oil's heaviness and reservoir's looseness are the two main characters of gas-cap sandstone heavy-oil reservoir, and the complex relationship of oil-water-air directly affects the development of oilfield. Through analyzing the geologic background of gas-cap sandstone heavy-oil reservoir and sedimentary feature of the delta, combined with single-well production test in Block Cao. 31, this paper summed up the variations of oilfield area and gas-cap, studied the distributing traits of well pattern and spacing in Sha-3 Segment and further demonstrated the possibility of waterflood development. The results show that after the application of various correlative sand control technologies and sand-carrying cold recovery of screw pump, with the oil production and reasonable oil recovery rate of single well controlled, the first oil recovery will be enhanced obviously.
出处
《西南石油学院学报》
CSCD
北大核心
2006年第3期77-81,共5页
Journal of Southwest Petroleum Institute
关键词
气顶
砂岩油藏
稠油油藏
开发政策
gas-cap
sand oil reservoir
heavy oil field
development strategy
