摘要
国际市场原油价格的长期持续低迷,使得油公司勘探投资锐减,物探公司勘探作业普遍采取轻资产、低成本、高效率运作模式。节点采集系统以其低成本、轻便、灵活、高效的优势成为物探公司野外地震采集施工的首选。针对研制的新型节点采集系统,给出了其技术指标,并与行业内3种典型节点采集系统进行了对比。在中国南方某山地环境将其与一种商用节点系统和一种生产在用的有缆采集系统进行了野外采集试验对比。试验采用3套采集系统平行点对点布设方式。施工结果表明,2种节点系统比有缆系统布设效率高,更适合复杂山地地形使用。对不同采集系统的地震数据进行了相同参数、相同流程的处理。结果表明,研制的节点系统与其它2套系统采集数据的信噪比、频谱特征一致。由于该区地震资料信噪比较高,内置单点高灵敏度动圈检波器芯体的节点系统与外接2串检波器的有缆系统相比,采集资料叠加剖面成像效果相当。研制的节点采集系统满足复杂地表、高密度、高覆盖次数等施工要求,具有很好的应用前景。
The persisting low price of crude oil in the international market results in decreased investments into exploration by the oil corporations.This situation induces the geophysical exploration companies,both domestically and abroad,to adopt light-asset,low-cost,and efficient modes of operation.Nodal acquisition systems have become the first choice for geophysical exploration companies worldwide because of their low cost,portability,flexibility,and high efficiency.In this study,a newly developed nodal system was presented;its technical specifications were described,and its performance was compared with that of three typical industrial nodal system.To this aim,a field trail was carried out to compare the novel nodal system with a commercial nodal system and a cabled acquisition system in a mountain environment in South China.Three systems of two-dimensional geometries were laid out side by side.The trail results showed that the two nodal systems were more efficient than the cabled system and proved suitable for the complex mountain terrain.The data acquired by the three systems were then processed using the same parameters and processing steps.The novel nodal system yielded results that were consistent with those of the other two systems in terms of spectrum characteristics and signal-to-noise ratio.The two nodal systems,having a built-in single high-sensitivity moving coil geophone core,showed the same imaging capability as the cabled system having two series of external geophones.It was concluded that the newly developed nodal acquisition system meets the requirements in terms of suitability for complex surfaces,high density,and high coverage,and has a good potential for industrial application in the future.
作者
吴学兵
WU Xuebing(Sinopec Geophysical Corporation,Nanjing 211100,China)
出处
《石油物探》
EI
CSCD
北大核心
2021年第2期272-282,共11页
Geophysical Prospecting For Petroleum
基金
2017年中国石化集团公司科研计划项目“节点采集系统的研制”(JP17038)资助。
关键词
节点采集系统
有缆采集系统
高灵敏度检波器
滤波
信噪比
幅频响应
叠加剖面
nodal acquisition system
cabled acquisition system
high-sensitivity geophone core
filtering
signal-to-noise ratio
amplitude response
stacked section
