Atyrau Oil & Gas
Highly efficient technologies for enhancing oil recovery and wells workover
V.A. Tushev, General Director of Zirax-Nefteservice OOO
The total forecasted recoverable resources of hydrocarbons in Kazakhstan are estimated at 17 billion tons, of them 8 billion tons fall on offshore fields. The main growth of oil production in the country will be provided by offshore fields, while the majority of oil fields being developed on land have already reached their maximal level of annual production. So, further growth of onshore production is connected basically with intensification of Теngiz and Каrachaganak fields’ development. Therefore, the situation with the development of the Kazakhstan sector of the Caspian Sea is a key one for Kazakhstan.
As is known, the old fields are exhausting because of improper development and operation conducted under the last century’s technologies. This leads to considerable reduction in oil yield and to the full stop of production. However, in the estimates of experts, the potential both of old and new fields in Kazakhstan is rather great, therefore, it is needed modern highly technological approach to enhance oil recovery. The point is not only in application of highly technological physical effect on the reservoir, but also in combination of physical effect and modern chemical reagents.
Zirax-Nefteservice is an intensively developing oil servicing company of Russia specializing in working out efficient solutions for the oil and gas companies based on individually tailor made modern technologies and unique reagents.
The company’s specialists have a lengthy experience in the oil and gas industry, as well as big production capacities and a wide range of reagents of own origin.
Zirax-Nefteservice renders a full range of services from designing to introduction of modern technologies to enhance oil recovery and workover of wells.
Availability of own and attracted production laboratories specializing in making research in oil and gas industry allow the company to conduct a full spectrum of lithological and mineralogical study and research of wall-building properties of core samples before and after treatment of reservoirs with special chemicals. High quality chemistry is applied to perform hydrochloric acid treatment, massive oxidizing of the bottomhole zone and wells killing of Zirax origin.
Zirax is the Europe’s leading producer and supplier of oil-field chemistry. Zirax is the largest manufacturer of pure synthetic inhibited hydrochloric acid and acid blends of FLAXOCOR™ series. These compositions are successfully applied for treatment of the bottomhole zone, development of wells after drilling and after hydraulic reservoir fracturing. The wide line of killing liquids (density of solutions up to 1.6 gr/cm³) allows one to solve the most complex tasks under killing, including sparing killing. Killing liquids of Zirax origin are distinguished by high purity, absence of solid phase and possess sparing properties.
Besides, at the initial stages, Zirax-Nefteservice proposes and insists on the conduct of testing of offered reagents in terms of their compatibility with reservoir fluids of the field where it is planned to conduct treatment of the bottomhole zone given the specificity of a particular object.
The arsenal of Zirax-Nefteservice’s technologies includes:
- Technologies of deeply-directed hydrochloric acid treatments,
- Highly technological solutions of self-deflecting systems,
- Technologies of sparing killing, solutions on reduction of watering, water-isolation and smoothing of movement profile (injection capacity),
- Physical methods of effect on bottomhole formation zone (hydroimpulsive, vibration-wave and ultrasonic),
- Development of wells by jet pump.
The company has the following state-of-the-art equipment at its disposal:
- Cementing and acid units SIN on the basis of КАМАZ,
- Trailers with tanks for transportation, treatment and storage of acid blends,
- Special devices and equipment for optimization of work of the injection and producing wells.
Along with equipment, Zirax-Nefteservice possesses specialized software for modelling chemical reagents injection processes.
Zirax-Nefteservice has positive experience in performing massive oxidizing of the bottomhole formation zones.
One of the main advantages of work with Zirax-Nefteservice is that all operations are carried out on a “turn-key basis”: from designing and calculations to direct conduct of operations by own forces.