|Table of Contents|

Characteristics and Genesis of Mudstone Compaction in Huizhou Depression, Pearl River Mouth Basin(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第04期
Page:
372-377
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Characteristics and Genesis of Mudstone Compaction in Huizhou Depression, Pearl River Mouth Basin
Author(s):
ZHENG Dan;  XU Si-huang;  SHANG Xiao-liang
(Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, Hubei, China)
Keywords:
mudstone;  compaction;  hydrocarbon generation;  Cenozoic Strata;  Huizhou Depression;  Pearl River Mouth Basin
PACS:
TE121.1+2
DOI:
-
Abstract:
In order to find out the relationship between the mudstone compaction in Cenozoic Strata and the generation and accumulation of hydrocarbon in Huizhou Depression, Pearl River Mouth Basin, characteristics of mudstone compaction were analyzed, genesis of undercompaction was discussed based on maximum pyrolysis temperature and hydrocarbon generation index. The results showed that three different types of compactions in longitudinal direction were rapid compaction in shallow layer, normal compaction and low amplitude undercompaction, rapid compaction in shallow layer was mainly developed in Wanshan Formation and Pleistocene Strata(less than 700 m), normal compaction was mainly developed from the bottom of Wanshan Formation or the top of Yuehai Formation to the bottom of Zhuhai Formation or the top of Enping Formation(1 800-3 200 m), and low amplitude undercompaction was mainly developed from the top of Enping Formation to Wenchang Formation(2 400-4 000 m); Huizhou Depression was divided into northeast and midwest undercompactions, northeast undercompaction developed two low amplitude undercompactions from Zhujiang Formation to Hanjing Formation and from Wenchang Formation to Enping Formation, midwest undercompaction developed one undercompaction from Wenchang Formation to Enping Formation; the undercompaction from Zhujiang Formation to Hanjing Formation caused by the high content of clay and rapid deposition, and the undercompaction from Wenchang Formation to Enping Formation was active source rock and caused by deposition, high geothermal heat and hydrocarbon generation; there was no overpressure in sandstone of Cenozoic Strata, Huizhou Depression.

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Last Update: 2010-12-20