裂缝型稠油油藏选择性堵水工艺研究  

RESEARCH ON SELECTIVE WATER SHUT OFF TECHNOLOGY IN FRACTURED VISCOUS CRUDE RESERVOIR

作　　者：龙秋莲[1] 陈秋芬[2] 蒋海军[2] 谢红星[3] 朱怀江[4] 唐萍[2] 

机构地区：[1]中国地质大学 [2]中国石化石油勘探开发研究院 [3]中国石化西北分公司工程院 [4]中国石油勘探开发研究院

出　　处：《钻采工艺》2008年第3期43-46,共4页Drilling & Production Technology

摘　　要：裂缝型稠油油藏石油运移过程中,由于宽缝对窄缝极强的流动屏蔽作用,加上油水流度比的差异,油井即使处于高含水生产阶段,出水缝仍可能比出油缝小。室内实验表明,在出油裂缝宽度平均值是出水裂缝的2.29倍时,暂堵处理使堵剂主剂在水岩心的分液比由0.36提高至0.89,大剂量的堵剂主剂选择性进入水岩心,对水岩心产生显著的封堵效果。现场采取聚合物交联凝胶体系作为暂堵剂,优先进入裂缝较宽的油层,封堵油层起暂时保护作用,较好地实现了选择性封堵水层的目的,取得显著的降水增油效果。In the process of migration of oil in fractured heavy crude oil reservoir, water output fissure is narrower than oil output fissure,although the oil well is in the course of high water content. The reason is that broad fissure has very strong flowing shielding effect on narrow one, in addition the mobility ratio between oil and water is large.Laboratory experiment showed that utilization of temporary blocking agent would increase the distribution ratio of main blocking agent in water yield formation from 0.36 to 0.89 when the width of oil fissure is 2.29 times more than that of water fissure.Field took cross-linking polymer gel system as temporary blocking agent, which entered broad oil fissure more than water fissure and temporary blocking oil fissure in order to protect it. This technique realized the goal of selectively blocked water layer and increased oil production noticeably.

关 键 词：裂缝性油气藏 稠油开采 选择性封堵 提高采收率 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]