Agbi, Dabatundo. For the optimum operation of natural gas fields, periodic reviews are made to determine deliverabilities of producing wells, to evaluate reservoir formation characteristics, and to predict recoverable or deliverable reserves. Bottom-hole pressure data are often required for these reviews. Historically, these bottom-hole pressures have generally been obtained through direct bottom-hole measurements, which expose the operator to mechanical or equipment problems and a consequent loss of production and expense funds. The technique presented in the present paper attempts to avoid these problems by the use of fluid flow equations to calculate bottom-hole pressures from wellhead measurements of pressure and temperature. This method could be particularly useful in remote areas where the movement of equipment is difficult and expensive.
Acquiring bottomhole pressure and temperature data
Completion (oil and gas wells) - Wikipedia
Vieira 1. Fernandes 1. Freitas 1. Martins 2. Real time measurements and development of sensor technology are research issues associated with robustness and safety during oil well drilling operations, making feasible the diagnosis of problems and the development of a regulatory strategy.
Completion (oil and gas wells)
Well completion is the process of making a well ready for production or injection after drilling operations. This principally involves preparing the bottom of the hole to the required specifications, running in the production tubing and its associated down hole tools as well as perforating and stimulating as required. Sometimes, the process of running in and cementing the casing is also included.
Nurafza, Peyman Reza, and Jeremie Fernagu. A periodic measurement of static bottom-hole pressure to monitor the reservoir depletion is an essential reservoir management practice. This estimation is valid as long as there is only one phase present inside the well-bore. As soon as the pressure drops below dew point in the tubing, the vertical phase distribution changes and the bottom-hole pressure can not be accurately estimated using one single average density. Fluid segregation mechanisms involve complex thermo-convective phenomenon, in association to gravity, which are strongly related to the temperature gradient in the well bore.