摘要
:对胜利油区的稠油资源进行分类评价 ,指出胜利油区稠油油藏类型的复杂多样性 ;在分析该区稠油注蒸汽热采开发形势的基础上 ,认为稠油热采所暴露的主要矛盾是 :已开发区块基本进入高轮次吞吐阶段 ,面临如何确定下步开发方式及提高采收率问题 ;而尚未开发的新区大多属于超稠油、低渗、薄层或深层等开采难度较大的低品位油藏。为改善稠油油藏的热采效果 ,进一步提高采收率 ,油藏工程及数值模拟研究表明 :对老区不适合转驱的油田 ,通过综合治理、新技术应用 ,可以改善开发效果 ;理论研究及现场工业开发实践表明 ,乐安油田具有汽驱的可行性 ;利用水平井可有效开采超稠油。通过上述开发对策的实施 ,预计胜利油区稠油增加可采储量 96 0× 10 4 t,使该区稠油步入经济合理的开发轨道。
The viscous crude resources in Shengli petroleum province are evaluated according to different types. It shows that the reservoir type is complex and varied. Based on analyzing the thermal recovery of heavy oil by using steam injection, the main problems appeared how to work out next development scheme and enhance oil recovery at the stage of multicycle huff and puff of developed block. However, most of undeveloped new blocks are low-grade reservoirs with many development difficulties such as super heavy oil, low permeability, thin bed and deep pay. The reservoir engineering and numerical modeling show that the development efficiency may be improved by comprehensive management and new technology for the oil fields that are unsuitable for changing type of drive in old area. Theoretical researches and practical field development presents that steam drive is feasible in Lean oil field and super heavy oil may be produced effectively by using horizontal well. After implementing above development measures, it is predicted that recoverable reserves of heavy oil in Shengli petroleum province may increase 960×10 4t and heavy oil development may be more economic and reasonable.
关键词
稠油油藏
蒸汽驱
热力采油
采收率
heavy oil reservoir, thermal recovery, steam drive, horizontal well, comprehensive management, super heavy oil, oil drive and oil drain mixture way
