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
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.
LIU Zi-Cang, LIU Guo-Quan, Ge-Wei, Xiao Yu-Yong, YANG Hua, YU Ping, Yang Peng, REN Cai-Yun
. Hydrocarbon Accumulation Conditions and Exploration Region of Es sags in Kongnan Area
[J]. Natural Gas Geoscience, 2010
, 21(4)
: 606
-611
.
DOI: 10.11764/j.issn.1672-1926.2010.04.606
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