Oil & Gas Geology ›› 2001, Vol. 22 ›› Issue (2): 158-160,193.doi: 10.11743/ogg20010216
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Zhang Li1, Yang Yajuan1, Yue Leping1, Miao Kun2, Song Shemin2, Zhang Manku2
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Abstract:
Structural fractures developed well in Aershan reservoir, Hanan Oilfield. The width of the micro-fractures is 10~30 pin, the length is 1~3 mm and surface density is 0.025 mm2. The micro-fracture porosity and permeability have been calculated, and the distribution is analyzed. Micro-fractures are preface of macrn-fractures and the macro-fracture developed areas are also micro-fracture developed areas. A sandstone micro-model experiment has been done to investigate the process of displacement between fractures and matrix. Based on the above studies, micro-fractures play two different roles on waterflooding. On one hand, they may improve the permeability of the reservoirs; on the other hand, the together with macro-fractures and faults may improve network, which have bad effect on waterflooding. According to the characteristics of,micro-fractures in Aershan reservoir, some suggestions such as periodic injection are put forward to improve the effect of waterflodding in fracture-developed areas.
Key words: Hanan Oilfield, Aesshan reservoir, reservoir micro-fractures, waterflooding
CLC Number:
TE344
Zhang Li, Yang Yajuan, Yue Leping, Miao Kun, Song Shemin, Zhang Manku. CHARACTERISTICS OF MICRO-FRACTURES AND THEIR INFLUENCE ON WATERFLOODING IN AERSHAN RESERVOIR, HANAN OILFIELD[J]. Oil & Gas Geology, 2001, 22(2): 158-160,193.
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URL: http://ogg.pepris.com/EN/10.11743/ogg20010216
http://ogg.pepris.com/EN/Y2001/V22/I2/158
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