水平井底水油藏变密度射孔技术优化研究

Horizontal well of bottom water reservoir variable density perforation technology Optimized research

在水平井的开采实践中,底水油藏水锥进是一个严重的问题,它的出现使产油量显著下降。所以,延长油井见水时间、控制或延缓水锥进是十分重要的。而现在国内外如何在射孔技术上,人为控制生产压差,使水平井的水平段从远井地带到近井地带,固定生产压差生产,是目前油田工程人员关注的一个问题。本文考虑水平井水平段的摩阻,越到底部摩阻越大,在射孔器材上采用变孔密射孔设计方案,提出了射孔设计的计算方法,人为控制生产压差,使水平段从远井地带到近井地带,均匀流入,减缓底水的上升速度,该技术在大港油田的水平井中现场应用20余井次,见水时间都得到了不同程度的减缓,取得了显著的效果,为底水油藏水平井控制底水上升提供了宝贵的经验。

In the horizontal well exploiting practice, basal groundwater fingering is serious issue. Therefore, lengthening the water breakthrough time, controlling or delaying fingering is extremely important. But at present domestic and foreign, the artificial control production differential pressure in perforation technology, making the horizontal well the horizontal section from the far well the region to the near well region, fixedly produces the differential pressure production, is a question which the present oil field project personnel pays attention. This article considered the horizontal well horizontal section the frictional resistance, more arrives the base frictional resistance to be bigger, on the perforation equipment, uses changes the hole dense perforation design proposal, proposed the perforation design computational method, the artificial control production differential pressure, causes the horizontal section from the far well the region to the near well region, the even inflow, slows down the bottom water the ascending velocity, this technology in the DaGang oil field horizontal well application 20 wells, water breakthrough time all to obtain varying degree slowing down, has obtained the remarkable effect, which has provided the precious experience for the bottom water oil deposit horizontal well control bottom.