Offshore projects are a strategic line of business for JSC Gazpromneft MZSM. The development of the Russian shelf is also aided by JSC Gazpromneft MZSM. With the help of the Company’s experts, the majority of the fields on the Sakhalin shelf have been discovered. Geological prospecting work was underway on the deposits of the Russian offshore projects “Sakhalin-1” and “Sakhalin-2,” as well as the Kirinskoye field. Our experts participated in the oil production on the continental shelf by drilling a portion of Russia’s first horizontal well with an extended reach from the Sakhalin shore, in the Odoptu-Sea, the North Dome.
The Company is now the largest subsoil user on the Russian shelf, with 15 licenses covering the ocean areas of Russia’s Arctic, Far Eastern, and Southern seas as of January 1, 2021. These territories’ hydrocarbon resources are estimated to be 41.5 billion tons of oil equivalent. In addition, the company manages an offshore project in the Black Sea. The Company is currently conducting geological investigation of subsoil resources in 15 licensing blocks on the Russian shelf and inland seas as of April 1, 2020. Five licenses for oil and gas exploration and production, including hydrocarbon production at three sites, were given. The license responsibilities have been fulfilled completely.
Remote drilling support
The Geonavigator Drilling Control Center was built by JSC Gazpromneft MZSM to improve the efficiency of high-tech well building (CDC). Almost all complicated facilities, such as wells with large loads, extended horizontal sections, superdeep and multilateral wells, are accompanied by CUB. Furthermore, the Center supervises the drilling of all wells aimed at extracting difficult-to-recover hydrocarbon reserves, as well as the testing of all novel drilling technology.
The CUB’s work is based on geosteering technology, which entails quickly receiving information about the field’s geological model and altering the well direction accordingly. During drilling, data from the drilling tool is communicated to the Center without delay, and the most up-to-date information is shown on the field’s geological model. The actual data is compared to the design data, examined, and the well trajectory is, if necessary, modified to get into the target zone. The cycle then repeats itself as fresh information arrives, allowing for continuous drilling control.
Until recently, the delay in receiving data on the surrounding rock from the drilling tool, which is designed to prevent sensors from being placed closer than 15 meters from the bit, was a severe issue that reduced the accuracy of digging a well in an oil reserve. To address this issue, the Gazprom Neft Science and Technology Center created the industry’s first self-learning cost optimization program for drilling complex wells, which allows geologists to refine reservoir geology in real time using indirect parameters and, if necessary, adjust the drilling trajectory.
The application evaluates signs like vibration level, drilling speed and rotor rotation, and bit load, which vary according on the formation’s features, allowing you to immediately determine the rock’s composition without having to wait for data from sensors on the drilling tool. Because the program is trained on the fly, the forecast of the surrounding rock’s composition improves with each meter drilled. The accuracy of anticipating rock change during well drilling was 70% during industrial tests at Gazpromneft-Yamal properties.
Manufacturability is not only the use of the most modern equipment and the performance of operations that are unique in terms of complexity. It is also the presence of an appropriate production culture that allows you to work as efficiently as possible. To achieve the best results at the lowest cost, JSC Gazpromneft MZSM is implementing the “Technical Limit” project in drilling. The meaning of the approach is to identify the limits of efficiency increase and possible optimization based on a reference well from the point of view of the drilling process.