|Table of Contents|

Characteristics and Petroleum Geological Significance of Pores and Fissures Developed in the Paleo Weathered Crust(PDF)

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

Issue:
2010年第01期
Page:
60-64
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Characteristics and Petroleum Geological Significance of Pores and Fissures Developed in the Paleo Weathered Crust
Author(s):
LI Xiao-yan1; 2;  JIANG You-lu1;  CHEN Tao1; 2
(1.School of Geo-resources and Information, China University of Petroleum, Dongying 257061, Shandong, China; 2.Geological Scientific Research Institute, Shengli Oilfield Company, China Petroleum and Chemical Corporation, Dongying 257001, Shandong, China)
Keywords:
paleo weathered crust;  pores;  fissures;  capping layer;  migration pathway
PACS:
P618.13;TE122
DOI:
-
Abstract:
The characteristics of the pores and fissures developed in the paleo weathered crust are analyzed by means of summarizing the achievement of the formers' research, sorting data and observing thin section, and the petroleum geological significance of its structure is discussed. The result shows that the developed paleo weathered crust is quantizing structure, which includes weathered clay layer and semi-weathered rock; the middle pores and fissures of the sapropelic rock are intermediately developed, the upper and lower gradually decreases, and there is no development in big pore and fissures of weathered clay layer. According to the example analysis, it is summarized that the main factors affecting the development of pores in semi-weathered include lithology of weathered bedrock, weathering duration and intensity, the denuding thickness and the buried depth during the formation period of the weathered crust, and the filling characteristics of the pores and fissures. The compaction of lithology weathered clay layer could play a constructive role in keeping oil and gas; the pore connectivity in the middle part of the semi-weathered rock is excellent migration pathway and effective reservoir for oil and gas.

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Last Update: 2010-03-20