天然气封盖层的突破压力

doi:10.11743/ogg20000211

Abstract

Abstract:

According to a modeling experiment,breaking pressure is apprioximatly calculated by the alternate drive force of gas drived into the core samples of cap strata,the samples were set in a status similar to its real geological status quo anter.It is found that the breaking pressure increases with the decreasing of permeability.Under the same permeability,the breaking pressure in gas,oil and water bearing stata double one by one;the relation between breaking pressure and porosity is in reverse correlation.According to the parameters of the pressure,the sealing abilities of the cap rocks could be divided into six grades,and the complex grading evaluation criteria of gas cap rock sealing ability that is suitable for China is established.

Key words: cap rock, breaking pressure, modeling experiment, permeability, grading evaluation criteria

CLC Number:

P618.13

Deng Zuyou, Wang Shaochang, Jiang Zhenglong, Chen Zhaonian. BREAKING PRESSURE OF GAS CAP ROCKS[J]. Oil & Gas Geology, 2000, 21(2): 136-138.

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BREAKING PRESSURE OF GAS CAP ROCKS

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