摘要
对重复压裂造缝机理的研究表明,重复压裂井由于初次压裂裂缝以及油层生产活动引起的压力下降,导致近井地带的应力场发生变化,从而在重复压裂过程中引起裂缝的重新定向。结合华北油田桐西断块储层低渗透的特点,进行了重复压裂参数的优化和压裂材料的选择,提出了选井选层的原则。重复压裂技术在桐47-43x井成功实施,取得了很好的增油效果,为桐西断块储层下一步的开发提供了重要的技术措施。
Studying on producing gaps mechanism of multiple fracturing shows that pressure drawdown causing by first fracturing fracture and oil reservoir production in multiple fracturing well results stress field changing near well, and fracture reorientation in the course of multiple fracturing. Combining with low permeability characteristic in Tongxi fault block reservoir in Huabei oilfield, multiple fracturing parameters is optimized and fracture materials are chosen, principle about choosing wells and layers is provided. The successful application about multiple fracturing tech in Tong47-43x well, which gains stimulation oil effect, provides important tech measure for next development in Tongxi fault block reservoir.
出处
《油气井测试》
2008年第2期45-46,48,共3页
Well Testing
关键词
重复压裂
诱导应力分布
造缝机理
选井选层
增产
低渗透油藏
multiple fracture, induced stress distribution, producing gaps mechanism, choosing wells and layers, stimulation, low permeability pool
