Seismic Imaging Technology for Deep Strike-Slip Faults in Carbonate Reservoirs

doi:10.7657/XJPG20210218

Abstract

Abstract:

Seismic wave reflected from the deeply buried Ordovician carbonate reservoirs in Shunbei area of Tarim basin is absorbed and attenuated seriously, and the energy of the seismic wave field diffracted from the deep strike-slip faults in the Ordovician-Cambrian formations is weak, making it difficult to get accurate seismic image. To improve the quality of seismic image, we analyzed the seismic responses characterized by low frequency and weak amplitude, then suppressed noises while protecting low-frequency signals and carried out wavelet consistency processing, and finally applied fault-controlled velocity modeling, tomographic velocity inversion and broadband inverse time migration imaging technologies to improve the seismic imaging quality of the deep strike-slip faults under the desert in the Shunbei area of Tarim basin. The result is helpful to reduce exploration risks and provides reliable data for trap implementation and well allocation.

Key words: Tarim basin, Shunbei area, Ordovician, carbonate rock, strike-slip fault, seismic response, fault-controlled velocity modeling, tomographic velocity inversion, reverse time migration imaging

CLC Number:

P631.445

YANG Wei, ZHOU Gang, LI Haiying, MA Xuejun. Seismic Imaging Technology for Deep Strike-Slip Faults in Carbonate Reservoirs[J]. Xinjiang Petroleum Geology, 2021, 42(2): 246-252.

Figures/Tables 8

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