Volume Calculation Merhod for Fracture-Cavity Reservoir Body in Tahe Oilfield, Tarim Basin

Abstract

Abstract: Ordovician carbonate reservior in Tahe oilfield is a deep buried formation. Karst caverns play an important role in the oil and gas storage. Due to the extremely strong anisotropism and the limited seismic resolution, the scalar of fracture-cave reservoir body is almost undeterminable. Based on the waveform analysis using seismic attributions extraction and pattern recognition technique, the boundary of abnormal fracture-cave reservoir body is recognized, and the correlation factor of waveform between cave and fracture is established, and the volume of abnormal fracture-cave reservoir body is calculated at last. By the seismic forward modeling of fracturecave in vary scales, the correction charts have been established to calculate the volume of fracture-cave using the actural formationsurface ratio as a reference.

Key words: Tahe oilfield, fracture-cavity reservoir body, waveform analysis, volume calculation

CLC Number:

TE112.221

LIU Xue-li, LU Xin-bian. Volume Calculation Merhod for Fracture-Cavity Reservoir Body in Tahe Oilfield, Tarim Basin[J]. Xinjiang Petroleum Geology, 2010, 31(6): 593-595.

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Volume Calculation Merhod for Fracture-Cavity Reservoir Body in Tahe Oilfield, Tarim Basin

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