收稿日期: 2010-03-07
修回日期: 2010-05-27
网络出版日期: 2010-08-10
Hydrocarbon Accumulation Conditions and Exploration Region of Es sags in Kongnan Area
Received date: 2010-03-07
Revised date: 2010-05-27
Online published: 2010-08-10
刘子藏, 刘国全, 葛维, 肖玉永, 杨桦, 于平, 杨朋, 任彩云 . 孔南地区沙河街期凹陷基本成藏条件与勘探方向[J]. 天然气地球科学, 2010 , 21(4) : 606 -611 . DOI: 10.11764/j.issn.1672-1926.2010.04.606
There are four Palaeogene Shahejie period (Es) sags of Cangdong, Nanpi,Yanshan and Wuqiao in the Kongnan area, with intercommunication and geological features. Three structural configurations of the rift in two sides and uplift in middle part, rift in the east and overlap in the west, and rift in the west and overlap in the east accepted the deposition of fan delta, braid delta, and lake facies, respectively. Thus, three lithological types of sandstone, bioaccumulated limestone and dolomite exist in the corresponding structural configuration. The results of source rock evaluation suggest that the Wuqiao sag would have the poor potential of hydrocarbon generation and the other 3 sags have a certain petroleum resource. In comparison with the conditions of hydrocarbon accumulation in the four sags, we select the sags of Yanshan and Cangdong as main exploration target and deploy the proposal of lithological exploration in the cavity and slope zone.
Key words： Es period sag; Depositional facies; Source rock.
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