西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (6): 71-75.DOI: 10.3863/j.issn.1674-5086.2009.06.015

• 石油与天然气工程 • Previous Articles     Next Articles

THE MECHANISM RESEARCH FOR THE CROSSLINKED EMULSION FRACTURING STEADYING THE TUFFACEOUS RESERVOIR

XIE Chao-yang1 ZHANG Hao2   

  1. 1.Hailaer Directorate of Petroleum Exploration and Development，Daqing Oilfield Company Ltd.,CNPC,Hailar,Inner Mongolia 021008，China；2.Daqing Oilfield Production Engineering Research Institute，CNPC,Daqing Heilongjiang 163517，China）JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SCIENCE & TECHNOLOGY EDITION)，VOL.31，NO.6,71-75,2009（ISSN 1674-5086，in Chinese
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-20 Published:2009-12-20

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Abstract: Xinganling reservoir in Hailaer Oilfield is the typical tuffaceous reservoir.The early sand out phenomenon is serious when adopting the conventional water fracturing during the fracturing process，and the success ratio is very low，which restraints the oilfield development seriously.The oil phase consistency in crosslinked emulsion fracturing system which is researched for tuffaceous reservoir is very low，and the compatibility with the tuffaceous reservoir rock is rather well.The job implementation success ratio measured up to 97% in the field test for 75 oil wells and expanding application for 118 oil wells.It resolved the puzzle of the fracturing commission in Xinganling reservoir thoroughly.This paper researched the mechanism of steadying the tuffaceous reservoir rock from the physical characteristics，film forming cut off action，viscosifying cut off action，two-phase flow and Jamin action theory in crosslinked emulsion fracturing.

Key words: the crosslinked emulsion fracturing, film forming cut off action, viscosifying cut off action, the tuffaceous reservoir fracturing, the mechanism research

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