System Tract and Depositional F acies of Lower Ganchaigou Formation in Qigequan Area,Qaidam Basin

Abstract

Abstract: Transgressive system tract and regressive system tract in lower member of Lower Ganchaihou formation are recognized from the analysis of geological logging and well logs in Qigequan area. The reservoir rock type is dominated by fan-delta sand body and deep-hemideep lake turbidite sand body. The log sequence analysis is integrated with seismic reservoir prediction technique. The system tract is applied to the analysis of seismic atribute and the map compilation of sedimentary facies. It is predicted that lithologic oil- gas reservoir may be shaped in the delta front of the southeastern Qigequan area and the sublacustrine fan's sand body of the northern Qigequan area.

Key words: Qaidam basin, Qigequan area, Paleogene, system tract, sedimentary facies, sand body, hydrocarbon prospecting

CLC Number:

TE111.3

LI Jun, WU Yin-ye, CUI Hua-juan, LIU Zhong, JIANG Bo, WU Wei-an, GUO Bin-cheng. System Tract and Depositional F acies of Lower Ganchaigou Formation in Qigequan Area,Qaidam Basin[J]. Xinjiang Petroleum Geology, 2005, 26(4): 370-372.

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System Tract and Depositional F acies of Lower Ganchaigou Formation in Qigequan Area,Qaidam Basin

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