Research About Anti-Channeling & Lose Cementing Technology Of Daqing Mid&Low-Permeate Oil-Field

After the low-permeate layer of southern & external part of DaQing Oil-field had developed by water-driving, the stratum-press got involuted improving, this made the pressure of newly-drilled well-hole more complex, the low-permeate & high press layer release press slowly, same times part of these layers have upper slit. Such factor cause some problem on cementing job such as over-pressing and anti-lose. While the well-cementing quality drops will affect the exploration and development of this oil field. Therefore, we research one set of technology which can slove these problems. The technology serial include: annual re-pressure cementing technology; SAC slight-expand & anti-channeling cement-slurry system; ZJ-102 low density cement-slurry system; DZF anti-lose & high-tenacity cement-slurry system; stage cementing technology and anti-leak cementing parameter select technology. These technology solve the problem and improve the cementing quality of DaQing oil-field. It have important theoretical conduct affection and actual application value in developing low-permeate oil-field more quality and more efficiency.