The requirements for the design and manufacturing of nodal devices are relatively low. The most basic modules of a nodal device include controllers, acquisition circuits, GNSS timing circuits, geophones, batteries, interfaces, downloading cabinets, data downloading & compositing servers, optional testing circuits, signal generators, and QC manuals. As mature supply chains are available for all the above modules, manufacturers pay more attention to organically integrating the above modules into products that can stably work and meet the needs for the signal acquisition of seismic exploration. However, the absence or neglect of some details in some products on the market due to design or cost considerations will cause difficulties in the field application of seismic data acquisition. The data acquisition quality of the nodal devices relies entirely on the independent performance and stability of each nodal device, which further rely entirely on the manufacturers’ understanding of signal acquisition for seismic exploration and data acquisition operations and the resultant design. The requirements of oil and gas exploration and development in new situations must be considered in the design of nodal devices. The focus of oil and gas exploration and development is constantly shifting to deep and ultra-deep parts with more complex ground surfaces, and thus high precision and resolution are required for signal pickup. As a result, nodal devices should be more capable of acquiring weak signals and broadband signals, which cannot be compromised in the design. This paper elaborates on the fundamental details of signal acquisition, test functions, circuit design, storage, batteries, profile, auxiliary systems, quality control, and auxiliary devices in order to avoid problems such as signal distortion, coupling, and EMC.
岩巍. 地震勘探节点采集系统设计的要点[J]. 物探与化探, 2022, 46(3): 570-575.
YAN Wei. Key points of the design of a nodal acquisition system for seismic exploration. Geophysical and Geochemical Exploration, 2022, 46(3): 570-575.
Yi B J, Yuan Z J, Gan Z Q, et al. Introduction to the principle of node seismic instruments and the design points of integrated acquisition stations[J]. Equipment for Geophysical Prospecting, 2021, 31(6):351-355,360.
National Energy Administration. General technical specification of the petroleum seismic data acquisition system[S]. Petroleum and Natural Gas Industry Standards of the People's Republic of China,SY/T 5391—2018.