X油田相对渗透率曲线特征异常分析及合理建议  

Analysis on Abnormal Characteristics of Relative Permeability Curve of X Oilfield and Reasonable Recommendation

作　　者：于雪琳[1] 彭彩珍[2] 田鸿照[1] 孙雷[2] 王林[1] 

机构地区：[1]西南石油大学研究生部,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《吐哈油气》2011年第1期55-57,共3页Tuha Oil & Gas

摘　　要：X油田属于中孔中渗、低油水粘度比油藏,水驱开发过程中出现了注不进采不出,日产油量急剧下降的情况。在含水饱和度达到67%后,水相相对渗透率随含水饱和度增加而降低。在进行了室内评价实验及矿物组成分析,结果显示岩样具有强水敏性。无因次采液(油)指数分析得出由于水敏的存在,使得此油藏在高含水期不能通过提液来延长稳产期,建议采用水/气交替注入开发方式,并在注入水中加入2%防膨剂,数值模拟结果证实该方案可行。X oilfield belongs to a reservoir with characteristics of medium porosity and permeability and low oil/water viscosity ratio.During waterflooding development,water can＇ t be injected,oil can＇ t be produced,and daily oil production declines sharply.After water saturation reaches to 67%,water phase relative permeability drops with water saturation increasing.Based on the lab evaluation experiments and mineral composition analysis,it is shown that core sample has strong water sensitivity.The analysis of dimensionless productivity index shows it is not feasible to prolong the period of stabilized production of reservoir by raising fluid because of water sensitivity at high water cut stage.It is recommended that water alternating gas injection should be adopted and 2%anti-swelling agent should be added into injected water. Numerical simulation results confirm that the scheme is feasible.

关 键 词：强水敏 相对渗透率曲线 无因次采油指数 无因次采液指数 水/气交替注入 

分 类 号：TE312[石油与天然气工程—油气田开发工程]