关键词: 水平井开发,    ,  , 浅层断块油藏,    ,  , CO₂ 吞吐技术,    ,  , 增油机理

Abstract: Horizontal well is the main development way of Gaoshangpu shallow faultblock reservoir. During the process of horizontal well development edge water and bottom water usually channel, finger, flood so that the water cut goes up quickly. After water cut is high, it caused well productivity decreasing, seriously affects the development effects of oil field. To solve this problem, the CO₂ huff and puff technology was chose. The main principle was as follows. Under the condition of temperature and pressure, oil can dissolve CO₂ quickly. CO₂  can expand oil，change the physical property, decrease oil viscosity and interfacial tension between water and oil, increase dissolved gas drive energy then improve oil/gas recovery factor. Field application of 34 wells show that daily oil production increases from 1.72 t to 4.88 t and water cut decreases from 97.5% to 5145%. The technology has obvious stimulation effect.

Key words: Horizontal well development,     ,  Shallow faultblock reservoir,     ,  CO₂ huff and puff technology,    ,  Stimulation mechanism