石油地球物理勘探2025，Vol.60Issue(3)：655-666,12.DOI:10.13810/j.cnki.issn.1000-7210.20240222
复杂黄土塬区DAS井地联采采集技术及应用
Acquisition technology and its application of DAS borehole-surface joint exploration in complex loess plateau areas
摘要
Abstract
The absorption and attenuation of seismic wave energy in complex loess plateaus has always been a focal point for geophysicists.This problem makes it difficult to improve the resolution and signal-to-noise ratio of seismic data and satisfy the requirements for describing reservoirs and exploring residual oil in mature oil-fields.The distributed acoustic sensing(DAS)multi-well borehole-surface joint exploration(BSJE)techno-logy,characterized by identical-source excitation,consistent reception,small downhole trace distance,and high coverage,can reduce absorption and attenuation of near surface by receiving seismic waves in the well,which is one of the main approaches to solve the aforementioned problem.However,the most critical issue facing BSJE technology is the difficulty in vertical seismic profile(VSP)imaging due to uneven seismic excitation points on complex surfaces.At the same time,there are problems such as the lack of BSJE scheme demonstration method and immature techniques for synchronous reception and quality control of DAS multi-well BSJE.Therefore,based on wide-azimuth,wide-bandwidth,and high-density 3D seismic,a technical study on the DAS BSJE,processing,and interpretation of 3D-VSP is conducted with seven wellsin a block in the eastern part of the Ordos Basin.This paper,as the first part,"Acquisition",of the technical study systematically studies the key issues of DAS BSJE technology in complex loess plateau areas.A sector method-based BSJE excitation scheme demonstration technique aimed at VSP imaging is proposed,and a scheme with uniform excitation,DAS multi-well continuous reception,and quality control for BSJE is developed.High-quality DAS 3D-VSP data are obtained by applying the proposed method,which lays a solid foundation of high-quality data for multi-well BSJE-based 3D-VSP migration imaging and reservoir prediction.关键词
黄土塬区/分布式光纤声波传感/井地联采/3D-VSP/扇区法Key words
loess plateau area/distributed acoustic sensing/borehole-surface joint exploration/3D-VSP/sector method分类
天文与地球科学引用本文复制引用
陈浩林,张少华,陈朔,黄建华,高强,许银坡,祁君..复杂黄土塬区DAS井地联采采集技术及应用[J].石油地球物理勘探,2025,60(3):655-666,12.基金项目
本项研究受中国石油天然气集团有限公司科技项目"多物理场高精度油气地球物理探测技术与装备"(2023ZZ05)之课题"地球物理井地立体探测方法与装备"资助. （2023ZZ05）
