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| CHARACTERISTICS OF THE DEEP FORMATIONS IN SHUANGLIAO FAULT DEPRESSION |
| ZHANG Shu-lin1, HOU Li-li2, MA Feng-rong1, WANG Wen-zhuo2 |
1. College of Earth Sciences, Northeast Petroleum University, Daqing 163318, Heilongjiang Province, China;
2. Research Institute of Exploration and Development of Qinghai Oilfield Company, PetroChina, Dunhuang 736202, Gansu Province, China |
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Abstract On the basis of seismic, drill hole and well logging data, the Houshiling, Shahezi and Yingcheng formations in Shuangliao fault depression are analyzed on the lithological, electric and seismic reflection characteristics. Lithologically, the Huoshiling Formation is composed of tuff, volcanic breccia and sandy conglomerate; Shahezi Formation, composed of gray mudstone, fine sandstone and sandy conglomerate; while the Yingcheng Formation, silty sandstone and sandy conglomerate. The electrical resistivity of Huoshiling Formation shows medium to high value. The Shahezi Formation is characterized by continuous weak reflection or blank reflection. The electrical characteristics of Yingcheng Formation are consistent with the lithologic assemblage. In the seismic profiles, the structural high of Houshiling Formation shows strong reflection. The Shahezi Formation presents chaotic reflection to blank reflection or continuous parallel reflection. The Yingcheng Formation shows continuous strong reflection with low frequency in the top and bottom, while weak blank reflection with low to medium frequency in the middle part.
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Received: 02 May 2013
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2014, Vol. 23 
