低渗高饱和岩性油藏高效开发技术——以石南21井区为例

Research on Efficient Development Technology for Lithologic Reservoir with Low Permeability and High Saturation——An example from Shinan-21 Wellblock

准噶尔盆地石南21井区头屯河组油藏为低渗透率高饱和度岩性油藏,油层单一、储量丰度低、持续稳产基础差。在开发过程中利用油藏精细描述技术、数值模拟技术和油藏工程方法,逐步深化油藏地质认识和开发规律,不断优化开发方案及实施配套增产措施,提高水驱开发效果。油藏自2004年投入大规模开发,2005年产油量达到百万吨并连续稳产6年,截至2010年12月,区块采出程度达21.01%,采油速度在3%以上,实现了高速、高效开发。

The Toutunhe reservoir in Shinan-21 well block in Junggar basin is a lithologic reservoir with low permeability and high saturation,characterized by singularity of oil layer,low abundance of reserves and poor continuity of stable production.During the development of this reservoir,the fine description and numerical simulation technologies as well as reservoir engineering method have been used to deepen the understanding of reservoir geology and exploitation rules,continuously optimize the exploitation program and supporting stimulation measures,and finally the water flooding development efficiency has been improved.Since 2004,this reservoir has been put into production,followed by keeping million tons＇ oil output in 2005 for 6 years.By December 2010,the recovery degree is 21.01%,and the oil production rate is above 3%,thus realizing high-speed and efficient development.