Application of Well Logging Information to Secondary Porosity Analysis

ZHANG Zhen-cheng; SUN Jian-meng; SHI Zhen-fei; CAI Xiao-ming; SU Yuan-da; LIAO Dong-liang

Based on analysis of geological, seismic and experimental analysis in Gaoyou dep ression, the article analyses the originalmechanism of secondary porosity. The result indicates that the analysis of secondary porositywith well logging is available. The methods include: 1) the original stage of secondary porosity can be distinguished by sonic data; 2) The secondary porosity can be collected by density porosity and neutron porosity subtracting sonic porosity. The article analyses the qualification of the method; 3) The decomposition of organic matter may bring organic acid that can p roduce a lot of secondary porosity. The organic matter in source rocks can be measured by sonic and resistivity data; 4) the abnormal high pressure can be obtained by sonic data from which the formation and p reservation of secondary porosity are analyzed. Tha above methods are tested in Gaoyou depression

1. University of Petroleum, Dongying Shandong 257061;

2. Jiangsu Oilfield, SINOPEC, Yangzhou Jiangsu 225265

Received Date: 2004-11-22

Rev Recd Date: 2005-01-20

Publish Date: 2005-12-10

Key words:

Abstract: Based on analysis of geological, seismic and experimental analysis in Gaoyou dep ression, the article analyses the originalmechanism of secondary porosity. The result indicates that the analysis of secondary porositywith well logging is available. The methods include: 1) the original stage of secondary porosity can be distinguished by sonic data; 2) The secondary porosity can be collected by density porosity and neutron porosity subtracting sonic porosity. The article analyses the qualification of the method; 3) The decomposition of organic matter may bring organic acid that can p roduce a lot of secondary porosity. The organic matter in source rocks can be measured by sonic and resistivity data; 4) the abnormal high pressure can be obtained by sonic data from which the formation and p reservation of secondary porosity are analyzed. Tha above methods are tested in Gaoyou depression

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Application of Well Logging Information to Secondary Porosity Analysis

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