Nanpu Oilfield TZ Geological Characteristics And 3D Seismic Data Acquisition

In this paper,a shallow sea block as an example,research on the block construction design need to be taken to achieve the following purposes:(1)the accurate implementation of shallow low amplitude structure,low-grade fault and the distribution of reservoir,the reservoir scale,improve the producing rate of the reserves,is expected to implement the available reserves of 30 million tons,built to provide new target.(2)lay a foundation for development,production,construction,early reservoir description and high efficiency development.(3)make clear the structural characteristics of the deep and middle oil reservoirs,the distribution of dominant sand bodies,and promote the control and prediction of reserves upgrading.The quality of existing seismic data restricts the further development of evaluation and development.The main problems faced by the evaluation and development are as follows:(1)the middle and shallow layers are dominated by structural reservoirs,and many types of reservoirs are developed simultaneously.The fine description of complex fault zone structure,and reservoir prediction is the core to realize the effective use of the current proven reserves--seismic data can not meet the needs of low-grade fracture characterization,low amplitude structure and fine implementation of the fine description of single sand body.(2)the middle and deep layers are characterized by lithologic reservoirs developed in the tectonic setting,and the reservoir changes rapidly.The precise implementation of the structure and the characterization of the dominant reservoir are the key points for the evaluation of reserves upgrading.At present,the seismic data can not meet the needs of the fine formation of the deep and middle structures and the prediction of favorable reservoirs.(3)deep Qianshan reservoir is controlled by many factors,such as structure,stratum and reservoir.Accurate implementation of the Qianshan top surface and its internal structure and reservoir distribution prediction is the key to the implementation of reserves.At present,seismic data can not meet the needs of accurate prediction of Qianshan top surface and insider structures and reservoirs.Therefore,Jidong Oilfield decided to adopt the technology of seismic acquisition in shallow beach is advanced in the area,a new round of 3D seismic exploration,in order to meet the precise and accurate description of faults need to implement low amplitude structure and reservoir prediction.Shallow,deep in the study area,the deep seismic data can not meet the requirements of precise and accurate description of faults need to implement low amplitude structure andreservoir prediction,geological target design based on geologic target oriented modeling technology is based on the existing oil to provide all aspects of geology,seismic,drilling and logging data preferably,the formation of geophysical parameters,according to the geological target formation model needs,set up close to the actual target exploration area,simulation of seismic response of underground seismic or lighting.We should draw close attention to the latest collection results such as Nanpu 1 and CFD8-9.The application of the most advanced OBC acquisition technology,equipment and construction technology,and establish a more reasonable observation system.The use of theoretical results,after many tests,finally determine the appropriate parameters,and determine the final acquisition scheme,the results meet the requirements for the implementation of low amplitude structure and reservoir prediction,the project successfully completed.From the beginning of preparation to the end,adhering to the theory and practice,and by virtue of the field team itself rich construction experience,and ultimately complete the task.