Application of advantage trace stacking technique for lithologic reservoirs prospecting
Yi ZHANG1,2, Ning-Bo MAO1(), Li-Juan HE2
1. Key Laboratary of Exploration Technology for Oil and Gas Resources,Yangtze University,Wuhan 430100 China 2. Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,China
WZA-7N structure is located in the intersection area of multiple provenances, which is generally the prospective zone of development of lithological reservoir. Due to the limitation of seismic resolution, conventional seismic data cannot accurately describe lithological boundaries, not only increase the exploration risk, but also affect the reliability of reserve calculation.in face of this exploration problem, according to the difference of every seismic trace in one prestack gather, resolution in every prestack gather in aspect of seismic resolution imaging quality and geological characteristics reaction, combined with the seismic wave group characteristics of well synthetic seismogram and VSP corridor stacking traces, author designed a set of technical process for advantage seismic tace stacking, which can effectively improve seismic resolution and interpreted lithological boundaries again. The subsequent drilling confirmed the correctness of the new lithological interpretation scheme. Practice further shows that the advantage tace stacking technique can effectively improve seismic resolution and interpretation accuracy of lithological boundary, which is a practical technique suitable for fine exploration of lithological reservoirs in weizhouA-7N structure.
Wang J, Li H M, Li Z C, et al. Well-controlled seismic resolution enhancement technology based on GRNN amplitude spectrum estimation[J]. Acta Petrolei Sinica, 2015,36(6):715-722.
Wang D, Sun Z D, Wang D, et al. Analysis of the amplitude preservation of deconvolution methods based on physical model data[J]. Oil Geophysical Prospecting, 2013,48(3):359-365.
Gao J H, Wang L L, Zhao W. Enhancing resolution of seismic traces based on the changing wacelet model of the seismogram[J]. Chinese Journal of Geophysics, 2009,52(5):1289-1300.
Chen Z D, Wang C, Liu G Y, et al. Modeling method of near-surface Q value and its seismic pre-stack compensation application[J]. Acta Petrolei Sinica, 2015,36(2):188-196.
Qiu G Q, Wang J F, Zhang X, et al. Preliminary study on stratigraphic architecture of Middle-Shasan dongying delta and its significance to hydrocarbon exploration[J]. Acta Sedimentologica Sinica, 2001,19(40):569-574.
Feng Y L, Li S T. Depositional characteristics of lowstand sand bodies of the third member of the shahejie formation in the dongying depression and the significance in petroleum geology[J]. Geological Review, 2001,47(3):278-286.
Wang J D, Han W G, Yu J G, et al. Turbidity system in the third section of Shahejie formation of Dongying sag and implications on petroleum prospecting[J]. Acta Petrolei Sinica, 2003,30(5):123-126.
Fang Y, Deng H W, Sarti M, et al. Characteristics of evolution and distribution of lithologic trap in Dongying delta,Shengli oilfield[J]. Petroleum Exploration and Development, 2003,30(5):123-126.
Yang S, Chen H D, Chen A Q, et al. Application of advantage angle stack data to seismic interpretation of complicated fault oil field[J]. Journal of Chengdu University of Technology:Science & Technology Edition, 2014,41(2):145-146.
[14]
沈鹏, Symes W W. 角道集与偏移距道集在表象微分优化中的等价性[J]. 石油物探, 2007,46(6):565-568.
[14]
Shen P, Symes W W. Equivalence of angle gather and offset gather in representation differential optimization[J]. Geophysical Prospecting for Petroleum, 2007,46(6):565-568.
[15]
Deans S R. The Radon transform and some of the applications[M]. NewJersey:John Wiley & Sons Inc, 1983: 55-124.
Wang X W, Yang K Q, Zhou L H, et al. Methods of calculating coherence cube on the basis of wavelet transform[J]. Chinese Journal of Geophysics, 2002,45(6):847-852.
Wang X W, Liu W Q, Wang Y C, et al. Research and application of common reflection angle domain pre-stack migration[J]. Chinese Journal of Geophysics, 2010,53(11):2733-2734.
Shen X C, Lan M J, Qin Z C, et al. Sandstone prediction of the oil-bearing thin-layers based on seismic attributes from partial stack angle gathers[J]. Geophysical Prospecting for Petroleum, 2014,53(6):739-741.