Well drilling and completion technologies

During the past three years, Gazprom Neft has significantly increased the number of high-tech wells (horizontal, multilateral, and fracturing wells), mainly as a result of applying new drilling technologies. The portion of high-tech wells out of the total number of wells drilled in 2015 exceeds 40% — the highest rate in the Russian oil and gas sector.

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The Drilling Support Center of Gazpromneft STC provides operational technological support of drilling processes at all fields. DSC provides continuous 24/7 surveillance of drilling operations on the most complex wells and used the data acquired from the field to promptly decide whether or not the original plan should be revised.

A total of 27 projects have been initiated as a part of “Well drilling and completion technologies” since the beginning of 2016. All of them are focused on drilling effectiveness and productivity of new wells. The original count was 110 projects, and only 27 were included in the long-term program after the review process.

STC provided support of Gazprom Neft’s first repeated multistage hydraulic fracturing on a horizontal well. It was the first global experience when operation was performed on the well with conventional reserves and standard completion. Implementation of the new repeated MSHF technology was accompanied by a 4D geomechanical modeling of the focus area. It helped forecast the impact of current field development on the behavior of new fractures and create optimal frac design based on modeling results. It was also the first time when this kind of approach was used in Russian oil and gas industry.

Additionally, Gazprom Neft tests new kinds of drilling mud. Their use helped significantly improve drilling effectiveness of complex wells with extended clay zones, because the unique drilling mud composition reduces clay swelling by preventing it from entering into drilling mud with the help of triple inhibition. Tests results confirmed 20% reduction in the volume of drilling mud required, thus allowing to reduce the cost of drill waste recovery.