摘要
油井井底和近井地带地层结垢，油层内部粘土质点的迁移、堆积、膨胀导致油层渗流条件变差，是造成百口泉油田产液量大幅度下降、油层动用程度下降的主要原因。１９９３年起，在百口泉油田进行了重复射孔现场试验，在含油饱和度高、射孔密度低的层段进行重复射孔，取得了明显的效果：提高了油层的动用程度；增加了产量；促进了油藏的稳产。试验结果表明，为充分发挥重复射孔的效益，必须在油水井上同时进行重复射孔；油井要选择含水率小于８０％，层间矛盾不突出的井；重复射孔后应及时放大压差生产，以减少层间干扰；对吸水不均匀的注水井应先调剖，平衡纵向上的吸水状况后再重复射孔。
Devastation of percolation condition in oil-bearing zones resulting fromscaling in bottom hole and near-well bore formation as well as fine migration,depositionand swelling witbin reservoir is themajor cause ofasignificant decline in fluid productionand productivity of working layers of Baikouquan oilfield. Since 1993,field experiments ofmultiple perforation havebeen made in Baikouquan oilfield,of which obvious effect isachieved in horizons with high oil-saturation and low shot density, enhancing working de-gree of layers, increasing oilwell production and advancing stable production of reservoir.Results from experiment showed that multiple perforation showed be made in productionvvell and injection well simutaneously in order to fully develop a beneficial results of it.Production weil selection of vvater cut less than 8 percent without distinct inter-zone inter-ference is necessary,followed by increasing drawdovvn to reduce interference betweenzones in time after multiple perforating . For nonuniform entry injection well,adjust in-jection profile and equilibrium vericle water intake should be made before multiple perfo-ration.
出处
《新疆石油地质》
CAS
CSCD
北大核心
1995年第3期261-264,共4页
Xinjiang Petroleum Geology
