No abstract

«Mobile Driller» is a part of «Digital Drilling» IT Project aimed at developing and implementing IT solutions, which make it possible to plan, assess and analyze the operations in the process of well construction and response to deviations in real time. The main target of "Mobile Driller" Project is to find the solutions for immediate provision of the drilling rig employees with information. The project implementation resulted in a set of technologies (audio, video equipment, warning panels, etc.) for operation under real climate conditions of Far North and a completed prototype of the system for informing the employees. The market of the available hardware solution models was analyzed to develop a set of technologies. The possibility to use in the areas of explosive hazardous atmosphere was taken into account when selecting the models. The selected equipment package was assembled and tested at a drilling site in Novoportovskoye oil-gas condensate field. The testing was conducted at temperatures from −39°C to +24°C; Thirteen equipment usage algorithms were implemented for four types of the employees: supervisor, toolpusher, driller and driller's assistant. The feedbacks from the users were recorded by means of check-lists and individual interviews. The list of recommendations was drawn up based on the testing results. The following results were obtained in the process of the Research and Development Project implementation: The algorithms were developed to inform drilling rig employees about current status of implementation and changes of a drilling plan, upcoming operations, performance indicators, revealed deviations and critical situations; The optimal means for warning/informing the employees were selected: videowalls, smartphones, tablet computers, fitness bands, visual signal devices, hard buttons, wired and wireless headsets, AR/VR devices; the prototype of the system was developed to control all the devices and implement information provision algorithms. The tests at the drilling site of Novoportovskoye oil-gas condensate field revealed that the equipment was operating consistently under real climate conditions, which include low temperatures (below −40° C) and precipitation. The drilling rig employees evaluated every algorithm and equipment. Based on the evaluation results it was determined that the system allows to effectively communicate the information to the employee thereby reducing the information delivery time and improving the response rate. Based on the project implementation results the objective information about possibilities to use the information provision system under Far North conditions was obtained. Due to "Mobile Driller" the employees are immediately informed about upcoming operations, performance indicators and revealed deviations.

No abstract

One of the largest oil fields on the Yamal Peninsula, the Field NP is characterised by complex geological settings. Massive gas caps pose significant complications to the extraction of large oil reserves occurring immediately below them. In such conditions, new approaches are required to achieve economically viable production. This involves well construction based on a fundamentally new configuration and the use of new technologies. When drilling wells that penetrate more than one target reservoir, the legislation requires performance monitoring and separate production allocation for each reservoir. The article dwells on the first case of separate production allocation in a multilateral well completed with the TAML-1 solution. The well penetrates two reservoirs with different porosity and permeability, using the dynamic quantum PLT technology. The well was drilled taking into account the properties of the impermeable top of one of the reservoirs.

The key opportunity of Novoportovskoye Field is hydrocarbon reserves, which remain undeveloped. In this field, significant oil reserves directly underlie massive gas caps. Economic efficiency in such geological conditions is based on the use of new technologies for the maximum extension of field infrastructure loading. This paper reviews prerequisites and cases of multilateral well drilling technologies as an efficient EOR method at Novoportovskoye Field. The paper summarizes the results of drilling of nine multilateral wells. The strategy of multilateral well completion at Novoportovskoye Field increased the level of complexity defined by technology advancement for multi-laterals (TAML). First, a multilateral well with an openhole lateral was drilled. This openhole section collapsed when the well was brought into production at the target drawdown. Therefore, the second stage was to construct a multilateral well with cased main bore and lateral using TAML-1 technology. A version of TAML-1 technology developed by a Russian manufacturer was adapted and implemented at this stage. Several sidetracking methods were tested to reduce the rig time and multilateral well construction costs. Application of rotary steerable systems (RSS) for sidetracking instead of conventional rotary assemblies and downhole motors enabled to reduce the average sidetracking time from 70 to 30 hours. The record time of sidetracking using RSS was 16 hours. The history of Novoportovskoye Field development demonstrates a continuous trend towards increasing horizontal section lengths from 1,000 to 1,500 and 2,000 meters. The cumulative multilateral well drilling experience enabled construction of a well with four laterals with a total length of horizontal sections of 4,411 meters. It was the first well with four laterals in Russia built according to TAML-1 technology. As compared to conventional horizontal wells, the highest initial incremental oil rates were registered in multilateral wells drilled in the Jurassic Yu2-6 interval and the Cretaceous NP2-3 interval of the Novoportovskaya Formation. Considering that the share of the Yu2-6 interval in the oil reserves of Novoportovskoye Field is 46% and the share of the NP2-3 interval is 17%, the operator decided to increase the share of multilateral wells to develop these intervals. The project objective for 2018 - 2020 is to increase the number of cased holes, to separate laterals to the maximum possible distance, and to improve the completion level to TAML-4.