Regulation of Gas Well Production in Offshore Oil and Gas Fields

Abstract

The main issue in the operation of gas wells is the regulation of the pressure in the well and the establishment of certain dimensions of the production flow. There is a "practical well productivity" in the field of gas production. Practical productivity measures are expressed as a percentage of full open well production, practical productivity should not exceed 25% of open well production. Practical productivity is effective and economically efficient debit. Limits of 20 or 25% apply to more or less large flow rates and early stages of operation. Then, due to the depletion of the reservoir, the pressure is very low, so it is allowed to take all the flow rate that the well can produce. At the last stage of the operation, the gas can be produced under vacuum. This optimum pressure also determines the "practical yield". Wellbore pressure can be expressed as a percentage of the pressure present in the formation during production at a distance from the well where the formation has not yet been depleted. To achieve practical productivity, it is necessary to produce gas with a certain back pressure. For each formation, it is important to have an "optimal working pressure" in the well during operation. For this reason, creating an optimal technological mode in wells during operation is one of the important issues. In the optimal technological mode, well production is maximum and resource consumption is minimum. In this mode, harmful events that disrupt the normal operation of the well do not occur. The so-called "90% method" is recommended for the operation of gas fields in the Republic of Azerbaijan. This method has been successfully applied in a number of gas fields in the United States. Keywords: gas production, productivity, field depletion, practical productivity, flow rate, optimal mode, average well.