高孔渗强边水小规模砂岩油藏氮气人工气顶驱油矿场试验——以春光油田春22井区为例

Field test of nitrogen artificial gas cap oil displacement in the small-scale sandstone reservoir with high porosity, high permeability and strong edge water——by taking Chun 22 well block of Chunguang oilfield as an example

春光油田高孔渗、强边水、小规模砂岩油藏采用天然边水驱动开发方式,进入高含水开发后期,在现有井网条件下,顶部剩余油、侧翼剩余油无法有效动用。为此,利用数值模拟技术,开展了氮气人工气顶驱油的油藏适应条件、注采方案设计优化等研究。该技术在春22井区进行了矿场试验,取得了较好的开发效果。对国内外类似高孔渗强边水小规模砂岩油藏高含水开发后期进一步提高采收率具有借鉴意义。

Chunguang oilfield is characterized by high porosity, high permeability, strong edge water and smallscale sandstone reservoir, the natural edge water drive development mode is adopted. In the late stage of high water cut development, under the condition of the existing well pattern, aiming at the problems such as the remaining oil at the top and flank cannot be effectively produced, by using numerical simulation technology, the study on the reservoir adaptation conditions and injection production scheme design optimization of nitrogen artificial gas cap oil displacement is carried out. This technology has been tested in Chun22 well block and achieved good development results. It can be used as reference and guidance in the later stage of high water cut development of similar small-scale sandstone reservoirs with high porosity, high permeability and strong edge water at home and abroad.