靖安油田长6、长2油层驱油效率影响因素

EFFECTIVE FACTORS OF OIL DISPLACEMENT EFFICENCY IN CHANG-6 AND CHANG-2 RESERVOIRS, JING'AN OILFIELD

朱玉双 曲志浩 孔令荣 陈蓉 李劲峰

Zhu Yushuang Qiu Zhihao Kong Lingrong Chen Rong Li Jinfeng

对靖安油田长6、长2油层砂岩模型的水驱油实验表明,长6、长2油层虽然在物性上差异较大,但它们的最终驱油效率相差不大;实验还表明无水期结束之后的继续水驱油,长6油层的驱油效率有较大提高(25.79%),而长2油层的驱油效率则提高较小(4.32%)。影响靖安油田长6、长2油层驱油效率的主要因素是储层的孔隙结构、润湿性和注入水加压方式。

Displacement experiments of oil by water of Chang-6 and Chang-2 reservoir models in Jing'an Oilfields were made. The results indicate that their final oil displacement efficiency differ very little though they have differences in physical properties, and there is greater increase in oil displacement efficiency of Chang-6 reservoir (25.79%) than that of Chang-2 reservoir (4.32%) after water-free period. The major factors affecting their oil displacement efficiencyare the pore structure, the wettability, and pressure increasing way of injected water of the reservoirs.

10.11743/ogg19990414