MECHANICAL STABILITY OF STRATA ABOVE A GAS HYDRATE EXPLOITATION WELL

DOU Bin; GAO Hui; FAN Binbin; REN Lei; JIANG Guosheng

2012 Vol. 28, No. 12

Article Contents

Article navigation > Marine Geology Frontiers > 2012 > 28(12): 30-34

Next Article Previous Article

DOU Bin, GAO Hui, FAN Binbin, REN Lei, JIANG Guosheng. MECHANICAL STABILITY OF STRATA ABOVE A GAS HYDRATE EXPLOITATION WELL[J]. Marine Geology Frontiers, 2012, 28(12): 30-34.

Citation:

DOU Bin, GAO Hui, FAN Binbin, REN Lei, JIANG Guosheng. MECHANICAL STABILITY OF STRATA ABOVE A GAS HYDRATE EXPLOITATION WELL[J]. Marine Geology Frontiers, 2012, 28(12): 30-34.

MECHANICAL STABILITY OF STRATA ABOVE A GAS HYDRATE EXPLOITATION WELL

1 Engineering Research Center of Rock-Soil Drilling and Excavation and Protection, Ministry of Education, Wuhan 430074, China;
2 Engineering Faculty, China University of Geosciences, Wuhan 430074, China

Received Date: 23 October 2012

Abstract

Abstract

The pressure change caused by marine gas hydrate decomposition during exploitation will result in stress redistribution, sediment creeping and collapse and/or landslides of the upper strata, in addition to casing deformation and wellhead incidents. Taking a well covered marine gas hydrate deposit as an example, we established in this research a mechanical stability model for the upper strata based on the parameters of the upper strata, wellbore pressure and residual formation support force of the gas hydrate deposits when gas hydrate is decomposed, as wellbore pressure change was adopted to exploit gas from the deposits.
- marine gas hydrate /
- controlling wellbore pressure /
- physical parameters /
- mathematical model /
- upper strata mechanics stability