摘要
为降低油井中的含水量 ,提高油井产油量 ,通过岩心测试及动静态资料分析 ,研究了头台油田储层中天然裂缝的特征。结果表明 :头台油田储层中构造裂缝较发育 ,且构造轴部的裂缝比两翼发育 ,裂缝平均线密度为 0 .0 57条 /m;裂缝主要发育在粉砂岩中 ,规模不大 ,以垂直缝为主 ,充填较严重 ;裂缝方位以近 EW方向为主 ;在注水开发中 ,水沿 EW向裂缝推进 ,使 EW向的油井严重遭受水淹 ,SN方向油井供液不足 ,导致整个油田地层压力下降且不均衡。认为沿裂缝布置注水井 ,可改善油田开发效果。
Based on the study of cores and analysis of developing data,the following knowledge has been obtained.Natural fractures are rich in Toutai oilfield and richer in tectonic axis than the two flanks.The line density of the oilfield averages 0.057 per meter. Fractures rich in silt rock are small in the size and mainly vertical.They are heavily filled and extend mainly along the direction of EW.In the waterflooding,water is going forward along the fractures of EW. Therefore, wells in the direction of SN have insufficient feeding liquid and bad effect. Sand pressure has been dropping in oilfield . According to the above characteristics, some feasible suggestions have been put forward.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第1期71-73,共3页
Journal of Northwest University（Natural Science Edition）
