DIAGENETIC SEALING CHARACTERISTICS OF FAULTING ZONE AND ITS APPLICATION

WU Kong-you; LI Ji-yan; CUI Shi-ling; YANG Hai-bo; LIU Zhen-yu

2011 Vol. 17, No. 4

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Article navigation > Journal of Geomechanics > 2011 > 17(4): 350-360

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WU Kong-you, LI Ji-yan, CUI Shi-ling, YANG Hai-bo, LIU Zhen-yu. DIAGENETIC SEALING CHARACTERISTICS OF FAULTING ZONE AND ITS APPLICATION[J]. Journal of Geomechanics, 2011, 17(4): 350-360.

Citation:

WU Kong-you, LI Ji-yan, CUI Shi-ling, YANG Hai-bo, LIU Zhen-yu. DIAGENETIC SEALING CHARACTERISTICS OF FAULTING ZONE AND ITS APPLICATION[J]. Journal of Geomechanics, 2011, 17(4): 350-360.

DIAGENETIC SEALING CHARACTERISTICS OF FAULTING ZONE AND ITS APPLICATION

1.
Faculty of Geo-Resources and Information, China University of Petroleum, Qingdao 266555, China
2.
Geophysical Research Institute, Shengli Oilfield Company, Sinopec, Dongying 257061, China
3.
Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, PetroChina, Kelamay 834000, China

Received Date: 14 May 2011

Publish Date: 25 December 2011

Abstract

Abstract

The diagenetic types which influence the fault sealing properties mainly include packing action, compaction, and cementation.The more shale contents of filler, the lower porosity and permeability of faulting zone, and the less possibility to seal.Packing action plays a vital role in control of the compactness of filler and the sealing strength of faulting zone when it is dormant.The faulting zone's sealing effect is directly proportional to the strength of packing action.After entering the shattered fault zone, hydrothermal minerals precipitated and crystallized with the decrease of temperature and pressure, and then they cemented fractures and breccias gradually.The main cementing minerals in faulting zone are calcite and quartz, and temperature and pressure play critical roles in cementation.The Well Xia-503 Faulting Zone occurs compact argillaceous fillers with one meter thickness approximately for being deeply buried and strongly cement.The observed result of scanning electron microscope shows that there are precipitating crystallization minerals in the fractures and pores of rock, and the sphere of cementation is 3 meters around the fault zone.Combined with packing action, compaction and cementation, Well Xia-503 Fault seals strongly, that is critical factor in hydrocarbon accumulation of Jiangjiadian Oilfield.
- fault sealing /
- packing action /
- compaction /
- cementation

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References

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