多方位VSP技术在川东寨沟3井目标选择论证中的应用  

APPLICATION OF MULTI-AZIMUTH VSP TECHNOLOGY TO TARGET SELECTION IN ZHAIGOU-3 WELL IN THE EASTERN SICHUAN BASIN

作　　者：冯万奎[1] 肖富森[2] 邵勇[1] 张延充[3] 雷志安[1] 

机构地区：[1]中国石油西南油气田公司重庆气矿 [2]四川石油管理局川东开发公司 [3]四川石油管理局物探研究中心

出　　处：《天然气工业》2006年第7期43-45,共3页Natural Gas Industry

摘　　要：在川东高陡构造,由于地腹构造的复杂性以及二维地震资料预测的多解性,钻探中存在着较高风险。近年来随着勘探开发领域的扩展,其钻探对象巳由相对单一可靠的目标,逐渐转至构造更复杂、地震资料信噪比更低的区块,一定程度增大了钻井失误的机率。因此,尽力减少失误,尤其是对失误井下步侧钻目标的选择论证十分重要。历年来,对失误井的论证,主要是通过再次消化地震资料,分析原因,重新拟定目标,因此,引入不同方法和技术手段进行失误井侧钻目标论证十分必要。文章以在川东寨沟湾潜伏构造上首次利用多方位VSP技术对寨沟3井进行侧钻目标选择论证,最终获高产气流为成功范例,介绍了该项技术在解决复杂构造失利井侧钻目标论证中的重要性及推广前景。Exploratory drilling in the steep structures in the eastern Sichuan Basin is risky due to the complexity of subsurface structures and the ambiguity of 2D seismic data interpretation. In recent years, the targets of exploratory drilling have changed from areas with relatively reliable single structures to areas with more complex structures and lower signal-to-noise ratio of seismic data, increasing the probability of drilling failure to some extent. Therefore, it is very important to minimize drilling failure, especially to properly select the target of sidetracking in the failed wells. Over the years, analysis of the failed wells has been focused on reprocessing and reinterpretation of seismic data, study of the causes of drilling failure and selection of a new drilling target. It is necessary to introduce various methods and techniques for selection of sidetracking targets in the failed wells. Multi-azimuth VSP technology has been successfully used to select the sidetracking targets in Zhaigou-3 well in Zhaigouwan buried structure in the eastern Sichuan Basin and high rate gas flow has been successfully tested in this well. Taking this well as an example, this paper introduces the importance and prospect of this technology in selection of new sidetracking targets in failed wells in complex structures.

关 键 词：VSP构造 断层 勘探钻井 地震勘探 四川盆地 

分 类 号：P631.4[天文地球—地质矿产勘探]