天然气工业2025，Vol.45Issue(12)：97-109,13.DOI:10.3787/j.issn.1000-0976.2025.12.008
四川盆地隐蔽型储层地震勘探处理解释一体化关键技术与发展方向
Key technologies for integrated seismic exploration,processing and interpretation of subtle reservoirs in the Sichuan Basin and their development directions
摘要
Abstract
During the 14th Five-Year Plan period,to achieve the goal of increasing natural gas production to 50 billion cubic meters in the Sichuan Basin,PetroChina Southwest Oil & Gasfield Company focused its natural gas exploration efforts on subtle reservoirs of carbonate rocks and tight sandstone with great burial depth,strong heterogeneity and small wave impedance difference.This type of reservoirs have weak seismic signals with severe interference,and cannot be identified,located and drilled precisely.To address these difficulties,this paper systematically studies the multi-physical field,full-wave field exploration technology based on"two-wide,one-high"(wide band,wide azimuth,and high density)seismic data.This technology integrates the information of multiple wave fields including P-waves,converted waves,pre-stack AVO,and wide azimuth.In addition,a series of trinity integrated seismic processing and interpretation technologies centered on"high-fidelity imaging of weak signals,fine characterization of subtle geological bodies,and quantitative prediction of reservoir lithology and physical properties"are developed.The following results are obtained.First,the established technology series for pre-stack fidelity denoising of weak signals,wide-band recovery,and high-precision pre-stack depth migration expand the effective band of deep seismic data from 8-55 Hz to 5-65 Hz,significantly improving weak signal imaging capability and deep subtle reservoir identifying capacity.Second,by virtue offull-wave field seismic signal interpretation and multi-physics seismic combined reservoir prediction,the accuracy of geological body characterization reaches 90％,the coincidence rate of reservoir prediction exceeds 80％,and the vertical identification precision of geological body is improved from 20 m to 10 m.In this way,reservoir prediction technologies leap from"post-stack"to"pre-stack"and from"single P-wave dependence"to"multi-wave collaboration".Third,technological progress strongly promotes the large-scale application of high-precision 3D seismic,and supports major exploration breakthroughs and target selection in the domains such as the Maokou Formation platform margin belt in the Penglai-Nanchong region and the Shaximiao Formation tight gas in the Tianfu Gas Field,achieving large-scale increase of natural gas reserves.Fourth,facing the trend of exploration targets moving towards deeper,more subtle,and more complex directions,this paper points out the development directions of the seismic exploration technologies in the Sichuan Basin during the 15th Five-Year Plan period.In conclusion,the rapid development of the seismic exploration technologies specially for subtle reservoirs provides a powerful technical support for the high-quality large-scale reserve increase and benefit production increase of natural gas in the Sichuan Basin,and this technology series are of great reference and guidance significance to the prediction of subtle reservoirs in other areas.关键词
四川盆地/地震勘探/隐蔽型储层/多次波压制/各向异性成像/全波场/多波勘探/含气性预测Key words
Sichuan Basin/Seismic exploration/Subtle reservoir/Multiple suppression/Anisotropic imaging/Full-wave field/Multi-wave exploration/Gas content prediction分类
天文与地球科学引用本文复制引用
冉崎,陈康,刁永波,杨广广,张福宏,李乐,陈伟,韩嵩,戴隽成..四川盆地隐蔽型储层地震勘探处理解释一体化关键技术与发展方向[J].天然气工业,2025,45(12):97-109,13.基金项目
新型油气勘探开发国家科技重大专项项目"复杂碳酸盐岩地球物理评价技术集成与示范"(编号:2025ZD1402502),中国石油天然气股份有限公司科技项目"复杂碳酸盐岩地球物理评价关键技术研究"(编号:2023ZZ16YJ04)、"致密砂岩气藏储层精细描述技术研究"(编号:2023ZZ25YJ01). （编号:2025ZD1402502）
