INFLUENCE OF PRESSURE SENSITIVITY ON IMBIBITION FOR LOW PERMEABILITY RESERVOIR ROCKS

doi:10.3863/j.issn.1000-2634.2008.06.042

西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 173-176.DOI: 10.3863/j.issn.1000-2634.2008.06.042

• 探讨与争鸣 • Previous Articles

INFLUENCE OF PRESSURE SENSITIVITY ON IMBIBITION FOR LOW PERMEABILITY RESERVOIR ROCKS

WANG Rui YUE Xiang-an TAN Xi-qun LIU Xiong-zhi

Enhanced Oil Recovery Research Center，MOE Key Laboratory of Petroleum Engineering，China University of Petroleum，Changping Beijing 102249，China

Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20
Contact: YUE Xiang-an

Abstract

Abstract: Mechanisms of cyclic water injection are analyzed by combining rock pressure sensitivity experiment and imbibition experiment in view of the characteristics of much remaining oil in the matrixes of fractured low permeability reservoir.Imbibition experiment of different permeability cores and different pressure drops，pressure sensitivity experiment of permeability are studied and compared.The results show that，imbibition recovery ratio firstly increases and then decreases with the increasing of permeability，permeability loss of core is mainly in the early stage of effective pressure increase，influence of pressure drop degree and speed on imbibition recovery ratio takes on the trend of firstly decreasing then increasing，pressure sensitivity is mainly at the smaller pressure drop degree，and the pressure difference caused by pressure fluctuation plays roles mainly at the bigger pressure drop degree and speed in the process of cyclic water injection.

Key words: imbibition, pressure sensitivity, pressure fluctuation, cyclic water injection, low permeability

CLC Number:

TE348

WANG Rui YUE Xiang-an TAN Xi-qun LIU Xiong-zhi. INFLUENCE OF PRESSURE SENSITIVITY ON IMBIBITION FOR LOW PERMEABILITY RESERVOIR ROCKS[J]. 西南石油大学学报(自然科学版), 2008, 30(6): 173-176.

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INFLUENCE OF PRESSURE SENSITIVITY ON IMBIBITION FOR LOW PERMEABILITY RESERVOIR ROCKS

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