Experience and Understand on Lithologic Trap Exploration in Shahejie Formation of Chenghai High-Slope
Received date: 2010-03-07
Revised date: 2010-05-27
Online published: 2010-08-10
In the Chenghai high-slope of the Dagang oilfield, the large-scale lithologic traps in Paleogene Shahejie Formation has became an important exploration area, because of the favorable conditions on oil-gas migration and accumulation. But the ground-surface complexity and limited understanding have restrained the exploration process for a long time. Recent years, the oil-gas exploration on Paleogene lithologic traps has made great breakthrough by deepening the geologic cognitions and changing the exploration ideas. The lithologic trap in the Chenghai high-slope has the intimate correlation with paleo-gulch of Chengning uplift. Moreover, the types and distribution of paleo-gulch made great influence on the shapes and boundary limit of lithologic traps. We considered that the seismic attributes and well restrain inversion would be the effective methods on predicting the reservoir distribution, sand boundary and thickness changing. This result will give an implication to guide the oil\|gas exploration on the similar conditions of lithologic traps in the Qikou sag.
Key words： ; Shahejie Formation; Lithologic traps; Chenghai high-slope.
YUAN Chu-Qin, XU Chang-Hua, DONG Xiao-Wei, LIU Ai-Ping, TAN Zhen-Hua, YANG Fan . Experience and Understand on Lithologic Trap Exploration in Shahejie Formation of Chenghai High-Slope[J]. Natural Gas Geoscience, 2010 , 21(4) : 621 -626 . DOI: 10.11764/j.issn.1672-1926.2010.04.621
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