碳酸盐岩油藏深度酸压技术研究及应用

Research and Application of Deep Acid-Fracturing Technique in Carbonate Reservoir

碳酸盐岩储层通过酸压改造,提高裂缝长度和酸液有效作用距离,是提高酸压措施建产率的关键。针对裂缝相对不发育的致密储层,开展了以控制裂缝高度为主的深度酸压技术研究;同时,对于裂缝发育的储层,开展了前置液加粉陶段塞降滤、大规模前置液酸压和交联酸酸压等深度酸压工艺技术的研究,强化降滤和造缝能力,减小或消除多裂缝的影响,提高了酸压穿透深度,在碳酸盐岩裂缝油藏中应用,取得了很好的应用效果。

Increase the effective distance between fracture length and acid by acid-fracturing treatment is a key to improve acid-fracturing producing rate for carbonate reservoir. In view of poor tight reservoir relative, a study of deep acid-fracturing technology which focuses on controlling fracture height is carried out, meanwhile, the deep acid -fracturing technology as to fracture development reservoir such as reducing filtration by adding powder into pad fluid - ceramsite slug, large - scale pad acid fracturing and crosslinked acid fluid fracturing are studied. Inten- sifying filtration reducing and width generation capacity, decreasing or removing multiple fractures and improving fracture- penetration depth, application of technology has got excellent result.