Gazpromneft Sakhalin gets a green light from the state environmental authority to drill a well at Dolginskoye field

The official environmental review board has approved Gazpromneft Sakhalin’s “Project documentation for the construction of exploration well No. 3-SD at Dolginskoye oil field on the Pechora Sea shelf.” The audit confirmed that the documentation fully meets the environmental protection laws and will make it possible to implement the project safely.

In conducting an integrated assessment of the environmental risks of drilling an exploration well at Dolginskoye field, Gazpromneft Sakhalin used Preliminary Hazard Analysis methods which are generally accepted in this area of study. The company is taking great care not to disturb the unique natural environment of the Arctic region and to maximally reduce its impact on the environment.

Photo caption: The GSP Jupiter jackup drilling rig

In particular, the project will use such technologies as an automatic well verticality maintenance system (a rotary steerable system) that increases drilling speed and thereby reduces the project duration and the quantity of drill cuttings that will be transported to the continent for disposal.

In order to strengthen control over environmental safety, it will be possible to monitor drilling operations in real time with the use of logging while drilling (LWD) sensors. Only water-based drilling fluids will be used for the drilling operations. Use of satellite systems will provide regular monitoring of the region.

“Modern oil and gas projects begin with a detailed risk analysis, and that makes it possible during the design phase to choose the most optimal solutions to ensure environmental safety and prevent negative environmental impact. We understand that plans to develop the Arctic shelf entail stricter requirements for environmental safety, and we are especially attentive to that issue,” said Vadim Yakovlev, Gazprom Neft First Deputy CEO.

Reference

Gazpromneft Sakhalin LLC is a subsidiary of Gazprom Neft and has experience in implementing projects on the Russian continental shelf. In autumn 2012, JSC Gazprom and Gazpromneft Sakhalin signed a contract for geological exploration and commercial development and operation of Dolginskoye oil field on the shelf of the Pechora Sea.

In March, Gazprom Neft concluded a lease agreement for the GSP Jupiter jackup drilling rig with Grup Servicii Petroliere S.A. (GSP). The GSP Jupiter will be drilling the Severo-Dolginskaya No. 3 well on the Pechora Sea shelf during the ice-free months of 2013. The drilling program involves a full set of geophysical well logging, testing of potential pay zones, and core sampling for laboratory studies.

Dolginskoye oil field, located in the central part of the Pechora Sea, 120 kilometers south of the Novaya Zemlya archipelago and 110 kilometers north of the shore of the Eurasian continent, was discovered in 1999. The depth of the sea in the area of the field ranges between 35 and 55 meters. A total of over 11,000 linear kilometers of 2-D seismic surveys have been conducted at the field, as well as 1600 square kilometers of 3-D seismic surveys. The drilling of three exploration wells has been completed, including two Severo-Dolginskaya wells in the northern part of the field and one Yuzhno-Dolginskaya well in the southern part of the field. At present, the field’s recoverable reserves are estimated at over 200 million tons.