摘要
气顶油藏作为一类较为复杂的油气藏类型,在开发中遇到的最主要的问题就是气顶气锥进,造成油环内油井气窜,严重影响油井产能。以数值模拟技术为手段,通过建立研究区精细地质模型研究了水平井开发气顶油藏过程中的设计方向、水平段的纵向位置和初期合理采油速度,得出了在适应海上油田实际操作前提下,要提高油环油采收率应将水平井水平段部署在油水界面之上1/3(12m)处,采油速度控制在5.6%以下较为合理的认识。油田实际应用效果表明,通过水平井技术能够显著提高单井初期产能,有效抑制气顶气窜。
As a complicated reservoir, gas-cap oil reservoir has the major problem of gas-cap gas coning during its development, which causes gas channeling of oil ring and productivity decrease. Using numerical simulation, establishing a fine geological model for the study area, this paper studies the design orientation, longitudinal position of horizontal segment and reasonable rate of oil production in the early stage during reservoir development by horizontal well. In order to increase oil recovery of oil ring, not only horizontal segment should be positioned 12 meters above oil-water interface but also production rate should be less than 5.6% based on the practicability for offshore oilfield. The application result shows that horizontal well technology can increase significantly the initial productivity of single well and control the gas channeling.
出处
《天然气勘探与开发》
2011年第4期56-59,100,共4页
Natural Gas Exploration and Development
关键词
气顶油藏
水平井
数值模拟
采油速度
gas-cap oil reservoir, horizontal well, numerical simulation, oil production rate
