天然气工业2026，Vol.46Issue(1)：64-74,11.DOI:10.3787/j.issn.1000-0976.2026.01.006
柴达木盆地涩北气田储层表征与稳产调控新技术:大型九分量纵横波地震技术
Application of 9C P-and S-wave 3D seismic survey in reservoir characterization and stable production control in the Sebei Gas Field,Qaidam Basin
摘要
Abstract
The Sebei Gas Field of the Qaidam Basin has entered the mid-to-late development stage,when the stable gas production faces great challenges.Due to high gas saturation and varying formation velocity,conventional compressional(P)-wave seismic survey yields unclear structural imaging and low-accuracy reservoir identification in gas cloud areas,seriously restricting the recovery of remaining gas reserves.Under this background,the world's first nine-component(9C)P-and shear(S)-wave 3D seismic survey was deployed and implemented.Based on the 9C P-and S-wave 3D seismic data,the structure and reservoir within the gas cloud area were precisely characterized,and the intrinsic relationships between different reservoir types and gas-water distribution patterns in the edge-water gas reservoir were revealed.Accordingly,targeted strategies for stable production control were proposed,and have demonstrated a significantly enhanced recovery of remaining reserves.The following results are obtained.First,the 9C P-and S-wave 3D seismic survey provides high-quality S-wave data in the gas cloud area,which offer technical advantages including true structural imaging,high vertical resolution,and accurate reservoir identification,thereby enabling fine characterization of interwell micro-structures and thin reservoirs.Second,the depositional model was reconstructed using the S-wave data,facilitating the innovative insight that shallow-water deltaic system develops in the study area,beyond the traditional understanding that shore-shallow lacustrine deposits exist across the area.Third,it is systematically revealed that in high-permeability zones,underwater distributary channels dominate water invasion pathways.Consequently,a development adjustment strategy was proposed as:targeting channels in water-uninvaded high structural areas,while tapping the potential in low-permeability zones and draining high-permeability zones in water-invaded middle–low structural areas.Application of this strategy to over 50 well has shown an increase of the estimated ultimate recovery(EUR)per well by 0.12×108 m3.It is concluded that the 9C P-and S-wave 3D seismic survey provides a critical technical support for maintaining the stable annual production of the Sebei Gas Field over 50×108 m3.This technique is highly promising for engineering application and offers significant guidance for the development adjustment of similar gas reservoirs.关键词
柴达木盆地/涩北气田/九分量纵横波三维地震/储层表征/水下分流河道/水侵规律/稳产调控Key words
Qaidam Basin/Sebei Gas Field/9C P-and S-wave 3D seismic survey/Reservoir characterization/Underwater distributary channel/Water invasion pattern/Stable production control分类
能源科技引用本文复制引用
宋伟,梁艳萍,项燚伟,温中林,王岩,谢梅,蔡银涛,涂加沙,管璐,杜晓濛..柴达木盆地涩北气田储层表征与稳产调控新技术:大型九分量纵横波地震技术[J].天然气工业,2026,46(1):64-74,11.基金项目
中国石油天然气股份有限公司科技项目"老气田'压舱石工程'关键技术研究与示范"(编号:2023YQX103). （编号:2023YQX103）
