摘要
通过对河南古城油田ＢＱ１０区特超稠油乳状液的室内试验分析，指出该种乳状液的实际相突变点为６８％左右，当相浓度Φ≥６８％时，以Ｗ／Ｏ型为主的乳状液突变为以Ｏ／Ｗ型为主的乳状液。乳状液变型后，原油与管道内壁之间的摩擦以及原油之间的摩擦转变为水与管道内壁及水与水之间的摩擦，从而大幅度降低其粘度和摩阻损失；通过对古城ＢＱ１０区特超稠油区块单元内部污水回掺降粘集输的现场试验，证明与室内试验分析得出的结论相符合，说明区块单元污水回掺不同于常规的掺热水，也不同于掺联合站处理过的净化污水，它优于单井掺稀油。最后指出该工艺可有效地降低井站回压，方便生产管理，降低开采成本，提高采油效率和经济效益，具有低耗节能的优点。
aboratory experiments have been conducted on emulsions of extraheavy crude from block BQ10 in Gucheng oilfield.It was found that the phase inversion point of the emulsion was about 68%,i.e.,when water fraction Φ≥68%,the emulsion will change from W/O to O/W.After phase inversion,friction between crude and pipe wall and the internal friction of crude will change to that between water and pipe wall,and between waters.As a result,viscosity and friction loss can be reduced greatly.Field tests by reinjecting the produced water back into the gathering system of the same cell confirmed the laboratory results.This reinjection differs from both conventional hot water injection and treatedproducedwater injection.It has some advantages over injection of light oil.Application of this easilyoperated technique may efficiently reduce the backpressure of wells,cut production cost,improve production efficiency and economic benefit.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1998年第3期125-130,共6页
Acta Petrolei Sinica
关键词
稠油
油田
污水
水净化
原油集输工艺
heavy crude oilfield waste water gathering process viscosity reduction test backpressure emulsion
