Abstract: One example of a wellbore control tool and a method of use is described. A leak is detected in a cased wellbore comprising a multiple telescoping casing sections. A fluid flows in an uphole direction through the cased wellbore. A flow of the fluid in the uphole direction results in a first force in the uphole direction. The leak is in a first telescoping casing section. An open downhole end of a wellbore tool having a weight at least equal to a second force greater than the first force on an uphole end of a second telescoping casing section that is downhole from a location of the leak in the first telescoping casing section is seated. The open downhole end of the wellbore tool provides metal to metal contact against the uphole end of the second telescoping casing section and restricts fluid flow into the leak.

Abstract: Some examples of determining wellbore leak crossflow rate between formations in an injection well are described. During normal operation of an injection well, multiple bottomhole pressures are determined based on multiple surface injection pressures. An Inflow Performance Relationship (IPR) for the injection well is determined based on the multiple bottomhole pressures and the multiple injection flow rates. After shut-in responsive to a subsurface leak, the shut-in injection well is modeled as a producing well having the IPR determined during normal operation of the injection well. A crossflow rate in the injection well at a location of the subsurface leak in the injection well is determined based on the IPR of the modeled producing well.

Abstract: One example of a wellbore control tool and a method of use is described. A leak is detected in a cased wellbore comprising a multiple telescoping casing sections. A fluid flows in an uphole direction through the cased wellbore. A flow of the fluid in the uphole direction results in a first force in the uphole direction. The leak is in a first telescoping casing section. An open downhole end of a wellbore tool having a weight at least equal to a second force greater than the first force on an uphole end of a second telescoping casing section that is downhole from a location of the leak in the first telescoping casing section is seated. The open downhole end of the wellbore tool provides metal to metal contact against the uphole end of the second telescoping casing section and restricts fluid flow into the leak.

Abstract: Some examples of determining wellbore leak crossflow rate between formations in an injection well are described. During normal operation of an injection well, multiple bottomhole pressures are determined based on multiple surface injection pressures. An Inflow Performance Relationship (IPR) for the injection well is determined based on the multiple bottomhole pressures and the multiple injection flow rates. After shut-in responsive to a subsurface leak, the shut-in injection well is modeled as a producing well having the IPR determined during normal operation of the injection well. A crossflow rate in the injection well at a location of the subsurface leak in the injection well is determined based on the IPR of the modeled producing well.

Abstract: A wellbore is divided into a plurality of depth intervals. For each depth interval of the plurality of depth intervals, a specific gas gravity, pseudo-critical gas properties, a pseudo-reduced gas pressure and temperature, a gas deviation factor, and a gas gradient and a bottom node pressure are determined. The determined bottom node pressure is used as a static bottomhole pressure.

Abstract: An initial value is set for an apparent molecular weight. Iterating occurs on calculations to determine a converged value for the apparent molecular weight, including the following. A specific gas gravity is determined. Pseudo-critical gas properties are determined. A pseudo-reduced gas pressure and temperature are determined. A gas deviation factor is determined using the pseudo-reduced gas properties. An average pressure, an average temperate, and a pressure gradient are determined for each depth interval. A new apparent molecular weight is determined. The absolute value of a relative error between a current value of the apparent molecular weight and the new apparent molecular weight is determined. If the absolute value of the relative error has converged to a constant, the iterating is terminated.

Abstract: Gas pressure gradient data of a reservoir interval is received. A gas mixture molecular weight is initialized. A gas deviation factor of the reservoir interval is iteratively calculated by a computer. The iterative calculation includes calculating a first gas deviation factor using a gas specific gravity based on the gas mixture molecular weight, calculating a second gas deviation factor based on the gas mixture molecular weight and the gas pressure gradient data, calculating a difference indicator indicating difference between the first and the second gas deviation factor, updating the gas mixture molecular weight based on the difference indicator, re-calculating the first and the second gas deviation factor and the difference indicator based on the updated gas mixture molecular weight, and outputting the gas deviation factor when the difference indicator is smaller than a pre-determined threshold.