In times of low oil prices, the most important question is production optimization, which comprising in increasing its efficiency while reducing costs. Well testing of naturally flowing oil wells is an integral part of the control and management of oil fields development process. At the same time the current scheme of well testing of the naturally flowing oil wells associated with certain technological risks, requires the mobilization of qualified staff and special technical means, which in turn leads to significant financial costs from the license holder.
In the following paper described the method of calculating bottom-hole pressures in naturally flowing oil well, which allows to reduce costs of the license holder on well testing and at the same time providing a sufficient degree of accuracy of the data about well performance. We have consistently set out the algorithm of the calculation method and performed its verification on the actual field data.
The calculations revealed that the accuracy of the proposed method does not exceed five percents for the most common case of naturally flowing well operating in practice. This result, in turn, suggests that the proposed method has an acceptable degree of accuracy and can be used as an effective and sufficient means of monitoring the development of oil fields with naturally flowing wells.
The introduction of the proposed method into well testing practice of naturally flowing wells will reduce the accident rate during tripping operations also as the financial cost of well testing, and thus achieve the goal of optimizing production in a crisis economy. The expected economic effect of the implementation of the proposed method will be about 50 % of the original value of naturally flowing oil wells testing by the classical scheme.
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