摘要
针对轮南地区奥陶系裂缝型储层埋藏深、构造形成期多、影响因素多、后期改造作用复杂等特点 ,采用数理统计、应力场数值模拟、岩石力学性质与构造、沉积、钻井资料相结合分析等方法 ,确定出该区裂隙形成时期及相互关系 ,并预测了各期裂缝、综合裂缝和有效裂缝的分布 .结果表明 ,轮南奥陶系裂缝主要形成于晚海西 -印支期 ,裂缝走向有SN ,NW ,NWW和EW向 4组 ,其中以NW ,NWW向为主 ;裂缝发育区主要位于桑塔木断垒带 ,其次为轮南断垒带东段、中部斜坡区的东部。
s: Because Lunnan Ordovician rift\|type reservoir beds are embedded deeply, the formation is formed through some periods and affected by many factors, and the late rebuildings are complex. Several methods, such as mathematical statistics, digital stimulation of stress field, analysis of rock mechanical property, and the combination of formation, deposit and well drilling data, are employed. According to these methods, the time of the cracks and the correlation between them are known, and then the distribution of the cracks, comprehensive cracks and the effective cracks are estimated. The results indicate that Lunnan Ordovician cracks are formed during the Epi\|Hercynian to Indo\|Chinese epoch, and the directions of strike of the cracks are of SN, NW, NWW, and EW, of which NW, NWW are main.The cracks mainly developed in Sangtamu rupture\|host zone, then the eastern sect and the east of the middle slope of LunNan rupture\|host subsequently. And the cracks of the area of well LN-1～LN11 and the area of WELL LN8～LN11～LN18 developed well,too.
出处
《大庆石油学院学报》
CAS
北大核心
2002年第3期1-4,共4页
Journal of Daqing Petroleum Institute
基金
国家"九五"科技攻关项目 ( 96 - 111- 0 3- 11- 0 4 )
