Prospecting for new oil reserves is a complex and high-cost endeavor, even when it involves traditional resources. The cost of geological prospecting operations, and the cost of mistakes, are higher still when investigating previously un-researched, inaccessible regions. Much of this uncertainty can be eliminated prior to commencing fieldwork through the process of basin modeling.
Through this technology, on the basis of all information available on the geology of a region, mathematical and analytical methodologies are used to recreate the processes through which geological strata have been formed — and how they have been changed — meaning that areas with hydrocarbon accumulations can be laid bare. Following construction and calibration of the basin model, the most promising blocks are selected, with a model of that field subsequently being constructed and comprehensive risk assessments are undertaken, allowing the viability of developing deposits to be fully justified.
Genuinely effective and fully inclusive basin modeling tools for complex formations do not yet exist —for which reason, their development has become a key priority for LLC Neftespetsremstroy's technology strategy.
Various electromagnetic methods are widely used in all stages of prospecting, exploration, and production, and field development, due to their high efficiency and relatively low cost. The high-density of transient electromagnetic (TEM) points and transmission loops places modern geoelectrical prospecting among 3D technologies. Prospecting is undertaken by LLC Neftespetsremstroy at fields at its Chonsky project in 2014, moreover, is the most extensive in the world to date in terms of the physical number of TEMs utilized (more than 7,600), as well as the record time in which the project was completed.
Seismic refraction in the subsurface investigation is a key technique in modern geological prospecting, involving the artificial stimulation of acoustic waves which are subsequently registered by seismic receivers before the resulting seismograms are subjected to mathematical analysis and geological interpretation. The accuracy and reliability of such investigations depend, to a large extent, on the volume of such wave sources and receivers. Until recently, however, increasing the availability of transmission and receiving points was constrained by the limitations of cable connections for the transmission of high volumes of data; a situation made resolvable through the advent of fiber-optic technology, however.
UniQ technology, developed by Schlumberger and introduced into Russia by LLC Neftespetsremstroy at its Vakunaisky block at the Chomsky project, Eastern Siberia, the volume of active data-transmission channels can reach up to several hundred thousand — significantly greater than under traditional methodologies.
There were 642 wells constructed and commissioned during 6 months of 2019 (293 wells for the same period of 2018), including:
production drilling – 200 wells;
exploratory drilling – 4 wells;
bitumen drilling – 78 wells.
Drilling on the Old Well Stock
There were 42 wells commissioned in the category of sidetracks and horizontal wellbore drilling during 6 months of 2019 (61 wells during the same period of 2018).
Drilling wells outside the Kalmykia Rep
There are wells being constructed in the Samara Region and the Nenets Autonomous District outside the Republic of Kalmykia.
Rotary steerable systems (RSS)
The construction of high-technology wells demands a range of specialist equipment. The basis for modern, effective, precise, and safe drilling these days lies in rotary steerable systems (RSS). RSS makes possible the drilling of both perfect deflection angle wells with along-hole-displacement of less than 0.2°, as well as horizontal wells running to a length of more than 9,000 meters.
Utilizing RSS makes possible the construction of extreme reach wells, as well as the high-precision drilling of wells in low-concentration reservoirs (one to two meters thick). Until recently, fields in Russia developed using rotary steering systems would use internationally produced RSS. In 2009, however, the first Russian-produced RSS, developed by St Petersburg’s CSRIElectropribor, successfully completed testing at LLC Neftespetsremstroy's Vyngapurovskoe field in the Yamalo-Nenets Autonomous Okrug. A further domestically produced RSS — Manufactured by Burintekh—completed testing in January 2009 at LLC Neftespetsremstroy field in the Kalmykia Rep Region, Russia.