“NIIneftepromchim” JSC provides a mix of remedies to increase oil recovery and intensify oil production, ensuring maximum efficiency and profitability.
The technologies are aimed at optimizing the parameters of hydrocarbon production from productive layers and reducing the costs of long-term operated oil fields, involving non-draining and immovable oil reserves in the development.
Water control technology with use of HC surfactants (SNPKh-9633, SNPKh-9640).
The technology is designed to reduce the watercut for recovered products and increase the oil production enhancement for carbonate and terrigenous deposits with a high water cut (60-99%) and various mineralization of waters that drown an oil well.
The method is based on the blocking of water-saturated zones of the formation with high-viscosity emulsion systems, which are formed while pumping HC surfactant. Emulsions,appearing in the washed zones of the layer, are resistant to water erosion and are destroyed upon contact with oil, which ensures high selectivity of the method and does not impair the permeability of oil-saturated interlayers. In addition, the developed reagents have a hydrophobizing effect, are capable of dissolving and dispersing deposits of asphalts, resins, and paraffins and lowering the viscosity of the oil.
In the case of high well injection capacity (low injection pressure), it is recommended that a filler to be added to its composition to increase the efficiency of the use of HC surfactant. Its introduction allows increasing not only the formation rate of emulsion systems and their stability, but also the viscosity and strength. This contributes to the strengthening of blocking properties, decrease in susceptibility to depressions and a decrease in the possibility of emulsion removal from the formation.
with a filler
|Number of treated wells||more than|
|Incremental oil production (tn per treated well)||1000||more than|
|Daily average incremental oil rate (tn per day)||2,0-5,0||2-6,5|
|Reducing the volume of produced water (tn per treated well)||more than|
1 year in terrigenous reservoirs, more than two years – in carbonate reservoirs
Technology of HS SAS impact on the oil layer through injection wells.
The technology is designed to improve the oilfield performance in conditions of heterogeneous formations with different mineralization of oilfield and injected waters and high water cut of well production.
The method is based on the ability of the “hydrocarbon solvent-surfactant composition-mineralized water” reagents to form viscous, stable gel-like emulsions with an external hydrocarbon phase, which facilitates redistribution of the filtration streams and equalization of the displacement front in injection wells. This ultimately leads to water cut reduction of production and production enhancement in exploitation wells. In addition, the technology has a hydrophobizing effect and it is able to dissolve and disperse deposits of asphalts, resins, and paraffins, reduce the viscosity of oil.
It is designed for conducting waterproofing works at exploitation wells and for redistribution of the filtration flows course in injection wells.
When interacting with water, it forms a rubber-like heterogeneous system. It has increased selectivity, i.e. when interacting with water, it forms a dense substance and blocks water-saturated reservoirs and subsequently it will be taken out during development of exploitation wells.
Advantages: selectivity, homogeneity, low viscosity, high adhesion, treatment time for 1 well does not exceed 6 hours, standard oilfield equipment is used.
The technology is used to seal the production strings and eliminate the inter-string flows.
SNPKh-3002 has a low viscosity, which allows it to be pumped into low-pore, low-permeability formations. The compound has a wide range of curing time, it is used at formation temperatures up to 90°С. The strength of this composition for bending, pressing exceeds the strength of cement stone, which allows it to be used to isolate sections of production strings subject to high depressions during operation of the wells.
The technology is designed to improve the efficiency of acid treatments in case of heterogeneous carbonate or terrigenous reservoirs with different mineralization of produced water at high water content (more than 80%).
The method is based on increasing the efficiency of acid treatments by blocking areas with increased permeability. The blocking of permeable zones is carried out with the help of viscous gel-like emulsion systems of the reverse type, being formed upon contact of the HC surfactant with mineralized waters that invade the well. The acid, being injected after that, will go not to areas with high permeability, but to oil-saturated low permeability areas not previously stimulated.
SNPKh-8903 is used as a multifunctional complex additive to the inhibited hydrochloric acid (it might be, in drilling mud acid) for its modification (upgrading) and preparation of acidic compounds.
The additive, which is a balanced composition, includes:
SNPKh-8905 is intended for stabilization of iron ions in technological processes of acid treatment of bottom-hole zone
SNPKh-8905 restores trivalent iron ions to bivalent
The reagent consumption rate in the acid composition is:
The technology is designed to improve well productivity in carbonate reservoirs.
Applied composition of SNPKh-9010 includes a mineral acid, a retarding reagent for the carbonate component of the formation, solvent-homogenizer, surfactant and corrosion inhibitor. As a result of low reaction rate with rock, the composition provides enlarging of active drainage radius of the formation, partial dissolution of the rock matrix and cleaning of pore channels from asphaltene-resin-paraffin deposits, mechanical impurities and clay particles.
Oil production of the well enhances by 1-6 tn/day, incremental oil recovery after 1 well treatment is not less than 450 tn. Initial water cutting of well production is up to 40%.
Standard oilfield equipment is used for well treatment.
The reagent is produced in an industrial environment and is delivered by railcars
The tubing is lowered into the well to the level of the lower perforation holes. A packer is installed above the perforated interval. The reagent is pumped into the well at the rate of 1.5-3.0 m3 per 1 meter of the penetrated thickness. The reagent is pressed into the formation by oil or water. After 16 hours, the final work is carried out, the oilfield equipment is lowered and the well is put into operation.
|The main exploitation targets||Tournaisian and Bashkir tiers||Bashkir tier, Vereiskian strata||Bashkir tier, Vereiskian strata||С2 Kashirskian-Podolskian strata|
|Treated wells, units||484||300||100||208|
|Incremental oil production per 1 treated well||1270||600 – 1000|
|Successful rate, %|
|Average incremental oil rate, tn per day||2,2- 3,2||1,6 – 2,7||3,8||2,35|
|Accumulated incremental oil production for the period, thousand tonns||̴ 650,0||275,1||156,0||179,8|
The technology is intended for deep processing of low-permeability clay-containing reservoirs and is based on the ability of the reagent SNPKh-9021 to maintain its activity while deep penetrating into the formation and gas cutting of fluid when reacting with SNPKh -9022 reagent.
The effect of the application is achieved by:
|Appearance||liquid from colorless to light brown color||turbid liquid upon settling, setting of white sediment while settling|
|Density at 20°С, kg/m3||1000-1100||Not less than 1080|
|Dynamic viscosity at 20°С, mPas||Not more than 5|
|Steel dissolution rate (st.3) at 20°С, g/m2, not more||0,35|
The method is implemented for exploitation and injection wells.
The treatment of the bottom hole zone is performed using standard oilfield equipment.
The technology allows increasing the productivity factor of exploitation wells by 2-10 times and the injectivity index of injection wells by 2-4 times.
Emulsifier SNPKh-9777 is intended for the production of invert emulsions, used:
The emulsion-based well killing fluid is an invert emulsion:
The viscosity and density of the well killing fluid is controlled by the phase ratio and the degree of water mineralization.
The technologies are designed to involve undrained oil reserves in the development due to the increase in the formation coverage with waterflooding followed by an increase in oil displacement capacity of injected water.
The essence of the technology is to expand the conditions of application and increase the efficiency of processing by using the optimal combination of surfactants of different nature, the concentration of components, as well as the dispersity of working agents in the oil-displacing and blocking systems.
The technology is characterized by the fact that a micellar composition with high oil-removal properties is used as a surfactant composition, and a polymer and fine aggregate are used as a polymer-disperse system.
|Technology||Total number of treated sites||Incremental oil production, thousand tons|
The technology is based on a combination of chemical and physical methods of oil recovery enhancement.
The use of chemical reagents and physical fields allows achieving a synergistic effect: significantly increase the efficiency of treatment.
The innovative method involves injection acid composition (SNPKh-9010ZH, 9021 (9030) or hydrochloric acid modified by the additive SNPKh -8903A) into the formation and treatment with acoustic waves.
Combined application allows:
Depending on the characteristics of the treated wells, it is possible to use ultrasonic acoustic waves, as well as acoustic impact waves.