Method and system for evaluating casing deformation resistance of cement stone for well cementation of oil and gas well
The invention provides a method and a system for evaluating the casing deformation resistance of cement stone for well cementation of an oil and gas well, and the method specifically comprises the following steps: preparing cement slurry for well cementation, and filling a mold annulus with the prep...
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| creator | QU LING HAN LIHONG WANG CHUNQUAN ZHANG PING ZHAO HAN WANG PENG DAI KUN YANG SHANGYU LIU ZIPING |
| description | The invention provides a method and a system for evaluating the casing deformation resistance of cement stone for well cementation of an oil and gas well, and the method specifically comprises the following steps: preparing cement slurry for well cementation, and filling a mold annulus with the prepared cement slurry to obtain a sample; applying a non-uniform external extrusion or shear load to the sample by adopting a shear test device so as to simulate the stratum displacement; the relative displacement delta S and the radial size variation delta D of the inner cylinder of the mold are determined; based on the relative displacement delta S and the radial size variation delta D, determining the deformation delta L of the sample; and judging whether the deformation delta L of the sample is greater than 25mm or not, if so, considering that the cement paste belongs to large-strain cement paste and the formed cement stone has the capability of inhibiting the deformation of the casing, and otherwise, considering |
| format | Patent |
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applying a non-uniform external extrusion or shear load to the sample by adopting a shear test device so as to simulate the stratum displacement; the relative displacement delta S and the radial size variation delta D of the inner cylinder of the mold are determined; based on the relative displacement delta S and the radial size variation delta D, determining the deformation delta L of the sample; and judging whether the deformation delta L of the sample is greater than 25mm or not, if so, considering that the cement paste belongs to large-strain cement paste and the formed cement stone has the capability of inhibiting the deformation of the casing, and otherwise, considering</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING |
| title | Method and system for evaluating casing deformation resistance of cement stone for well cementation of oil and gas well |
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