Ultra deep and high-density seismic acquisition method in desert area of South Xinjiang
XU Leiliang1, SONG Zhiqiang2
1. R & D Center of Science and Technology, Sinopec Geophysical Corporation, Nanjing, Jiangsu 210005, China; 2. Shengli Branch, SINOPEC Geophysical Corp., Dongying, Shandong 257100, China
Abstract：The Ordovician oil and gas reserves are abundant in the desert area of southern Xinjiang，China，which is an important oil and gas exploration and development field in the western region. There are three difficulties in the geological target exploration in this area，including the burial depth of the target layer (generally more than 7000 m)，the geological target is a small-scale fault solution，and the surface is a huge thick desert. The data resolution of conventional seismic acquisition is difficult to meet the needs of oil and gas development. High density seismic acquisition technology is recognized by the industry as an important technology to solve the development of subtle oil and gas reservoirs，and has achieved remarkable results in the east. The high-density seismic acquisition technology was introduced to the desert area of South Xinjiang for test，and small combination＋high-density acquisition technology suitable for ultra deep targets in the desert area of South Xinjiang was obtained in the test，including 25 m×25 m bin，400 times of coverage，3.3 million shot path density and horizontal to vertical ratio of 0.7 are suitable observation system parameters for SHB area in southern Xinjiang. Two string small combinations+moderate well depth charge are effective for widening high frequency. Finally，the imaging accuracy of fault solution has been significantly improved，indicating that high-density seismic acquisition technology has a good effect on the imaging of ultra deep targets in the desert of South Xinjiang.
徐雷良, 宋智强. 南疆沙漠区超深层高密度地震采集方法[J]. 石油地球物理勘探, 2023, 58(1): 83-92.
XU Leiliang, SONG Zhiqiang. Ultra deep and high-density seismic acquisition method in desert area of South Xinjiang. Oil Geophysical Prospecting, 2023, 58(1): 83-92.
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