Seismic identification of superposition relationship of the shallow water delta channel sand bodies: Case study of Linxing S area in eastern Ordos Basin
Received date: 2020-07-29
Revised date: 2021-01-27
Online published: 2021-04-27
The research of characterization of underground sand bodies under the conditions of sparse well pattern and large well spacing is difficult in the initial stage of oil and gas field development. This paper takes seismic data as the leading factor, combines wells and earthquakes, and uses waveform indicator inversion technology to identify the boundary and superimposition relationship of the distributary channel sand bodies in the upper Shihezi Formation in the Linxing S area, and clarifies the superimposition of distributary channels, relationship and its influencing factors. The superimposed type of distributary channel is controlled by A/S and channel energy. Four types of high-energy independent sand bodies, high-energy laterally cut sand bodies, vertical tangentially stacked sand bodies, and high-energy superposed sand bodies are identified on the seismic profile. There are three types of low-energy superimposed sand bodies: Superposed sand bodies and low-energy superposed sand bodies, low lateral spliced sand bodies, and low-energy isolated sand bodies. Compared with sand bodies developed in low-energy environments, sand bodies in high-energy environments have a larger scale and better physical properties, and high-quality reservoirs are easy to develop. Using this method to identify the superposition relationship of sand bodies can effectively provide a basis for sand body and gas reservoir prediction and guide well pattern deployment.
Cheng CHEN , Yu QI , Zi-liang YU , Bo WANG . Seismic identification of superposition relationship of the shallow water delta channel sand bodies: Case study of Linxing S area in eastern Ordos Basin[J]. Natural Gas Geoscience, 2021 , 32(5) : 772 -780 . DOI: 10.11764/j.issn.1672-1926.2021.02.003
(据CNKI,统计日期:2021-04-22)
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