地震勘探技术在南川地区页岩气勘探开发中的应用

doi:10.13809/j.cnki.cn32-1825/te.2022.03.002

Abstract

Abstract:

Considering of the “Multi-Complex” geological characteristics of the surface and underground in the Nanchuan District, a set of relatively complete ideas and technical processes for shale gas geophysics exploration have been explored through technical research on seismic data acquisition, processing and interpretation. And it has been successfully applied in shale gas exploration and development in Nanchuan District, including three aspects: ①In terms of acquisition, the quality of seismic data in limestone outcrops, karst caves and mined-out areas can be improved through real-time optimization of excitation points; ②In terms of processing, in order to improve the imaging effect, high-precision static correction technique in complex mountainous areas, the targeted processing technique in karst cave and goaf, and the Anisotropic Pre-Stack Migration Imaging technique are adopted; ③In terms of interpretation, on the basis of fine structure interpretation, the “sweet spot” prediction of shale reservoir is carried out from three dimensions: the enrichment of shale gas, the remodelling of reservoir and the driving of reservoir., and in the process of developing shale gas, horizontal well drilling is guided by prediction technology of dynamic target buried depth and formation dip prediction technique for horizontal wells.

Key words: “multi-complex”, seismic exploration technology, shale gas, exploration and development, seismic data processing and interpretation, Nanchuan area

CLC Number:

TE19

Ming LIU,Qingli MENG,Yuan DU, et al. Application of seismic exploration technology in shale gas exploration and development in Nanchuan area[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(3): 407-416.

Figures/Tables 10

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岩性		层位	理论设计（%）	优化设计（%）	优化提高（%）
砂岩区	侏罗系砂岩	J₂s、J₂x、J_1-2z	29.16	32.53	3.37
	三叠系砂岩	T₃x	6.78	7.78	1.00
	志留系砂岩	S₁h、S₁x	9.72	11.58	1.85
灰岩区	三叠系灰岩	T₂l、T₁j、T₁f	35.35	31.64	-3.71
灰岩区	二叠系灰岩	P₂、P₁	18.99	16.48	-2.51

Application of seismic exploration technology in shale gas exploration and development in Nanchuan area

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