CHARACTER AND ORIGIN OF OVERPRESSURE IN KELA 2 GAS FIELD

doi:10.3863/j.issn.1000-2634.2000.04.003

西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (4): 9-13.DOI: 10.3863/j.issn.1000-2634.2000.04.003

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CHARACTER AND ORIGIN OF OVERPRESSURE IN KELA 2 GAS FIELD

ZHU Yu-xin SHAO Xin-jun YANG Si-yu et al.

Research Institute of Petroleum Exploration & Development, CNPC

Received:2003-09-08 Revised:1900-01-01 Online:2000-11-20 Published:2000-11-20

Abstract

Abstract: The overpressured Kela 2 gas field is characterized by:overpressured reservoir intervals overlain by very thick salt and gypsum-argillaceous beds of the Paleogene which are of good sealing capability; wide extent of gasbearing area and very large reserve; key roles played by faults in pool-forming and gas accumulation. Tectonic uplift and lateral compression are major factors responsible for the abnormal pressure. Late Himalayan movement caused formation uplift and denudation, whereas the pore pressure was maintained by vertical and lateral sealing boundaries, resulting in development of overpressure.Later, this overpressure was further enhanced by the lateral
compression stress.

Key words: Kela 2 gas field, overpressure, cap bed, fault, tectonic uplift, lateral compression

CLC Number:

TE122.2

ZHU Yu-xin SHAO Xin-jun YANG Si-yu et al.. CHARACTER AND ORIGIN OF OVERPRESSURE IN KELA 2 GAS FIELD[J]. 西南石油大学学报(自然科学版), 2000, 22(4): 9-13.

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CHARACTER AND ORIGIN OF OVERPRESSURE IN KELA 2 GAS FIELD

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