石油地质与工程2025，Vol.39Issue(5)：79-85,7.DOI:10.26976/j.cnki.sydz.202505014
地质-地球物理综合甜点预测技术及其在Z气田中的应用
Geological-geophysical integrated sweet spot prediction technology and its application in Z Gas Field
娄敏 1段冬平 1何贤科 1李文俊 1汪文基 1李炳颖 1刘彬彬 1陈晨1
作者信息
- 1. 中海石油(中国)有限公司上海分公司,上海 200335
- 折叠
摘要
Abstract
The key to developing ultra-low permeability gas reservoirs lies in the characterization of sweet spots,as this directly guides well trajectory design and ultimately enables the efficient development of gas fields.Taking the H3a Formation of Z Gas Field as a case study,its sweet spots are characterized by small thickness,which complicates seismic prediction and poses challenges to trajectory design.To enhance pro-ductivity,improving the sweet spot hit rate during drilling is essential.To this end,trajectory optimization design is implemented using an integrated geology-modeling-engineering approach,with full utilization of well and seismic data.Starting from the genetic mechanisms and distribution patterns of sweet spots,the horizontal and vertical development zones of sweet spots are first identified.On this basis,geological model-ing combined with well-seismic integration is employed to conduct multi-scale fine characterization of the 3D spatial distribution of sweet spots in the target area,providing direct guidance for trajectory optimization.Finally,leveraging the sweet spot prediction results from the model,an innovative"candy-string"type multi-lateral undulating well is designed.This well type first drills deeply to expose vertical sweet spot in-tervals,followed by an undulating trajectory,enhancing the sweet spot hit rate.Application of this geolog-ical-modeling-engineering integrated high-efficiency well trajectory optimization technology successfully guided the real-time drilling trajectory optimization of Well A3M.The actual drilled length of sweet spots was twice the geological design,and the daily natural gas production reached three times the designed vol-ume,greatly improving single-well productivity.The proposed sweet spot research method and trajectory optimization strategy hold broad promotional value for trajectory optimization in other oil and gas fields.关键词
地质-地震/特低渗气藏/甜点预测/油气田开发/井位设计Key words
geology-seismology/ultra-low permeability gas reservoir/sweet spot prediction/oil and gas field development/well location design分类
天文与地球科学引用本文复制引用
娄敏,段冬平,何贤科,李文俊,汪文基,李炳颖,刘彬彬,陈晨..地质-地球物理综合甜点预测技术及其在Z气田中的应用[J].石油地质与工程,2025,39(5):79-85,7.
