| Gas hydrate is one of the backup energy resources, and it has being became the focus by the world in view of the oil and gas exhausted increasingly. The formation and decompose of gas hydrate is one of the main problem which hold up the gas hydrate drilling develops. The front porch research for the well control technology can provide theory foundation and technical assistance with gas hydrate drilling for future.The gas production function of hydrate dissolution with time is obtained under the conditions of different temperature and pressure by the experiment. And the model of hydrate dissolution rate is established. It can set up the academic foundation for the well control technology of gas hydrate drilling research.In view of the characteristic of gas hydrate drilling and the phase transition has being considered comprehensively, the wellbore multiphase flow model is being build through the theoretical analysis and deduce, and the models are solved by numerical method. In addition, this model has being verified by an example, computational solution coincide with the theory. It can provide theory foundation with hydraulic parameters calculation of the gas hydrate drilling.Gas hydrate drilling and well control technology correlated problem has being analyzed; well control technology and equipment complement applied to gas hydrate drilling is put forward. How to inhibit the gas hydrate decomposed, and gas cutting and overflowing along with well killing method of well control method is put forward. On the basis of hydraulic parameters calculation of routine offshore drilling, during the theoretical analysis and deduce, hydraulic parameters calculation mode of gas hydrate drilling is being build, and also formula of circulating pressure loss is being deduced, moreover, computational method of the well killing parameters is being established. Research fruit of this paper can provide the academic value with the nature gas hydrate drilling for our country.
|
PDF Full Text Request