NPF Engineering Center

Gazprom Nedra LLC scientific and manufacturing affiliate Engineering Center is a detached structural company subdivision in Moscow.

The following can be highlighted among the main spheres of affiliate activities:

1. Development, implementation and regulation of the newly introduced methods and technologies for subsequent handover to manufacturing subdivisions.

2. Summary, systematisation and study of the obtained information for justification of decisions made by the client for facilities under study.

3. Execution and coordination of scientific and research and subject matter and analytic works for lines of business:

  • acquisition, systematisation and seeding data base with new geological and geophysical, and field information (results of carried out geophysical surveys and works in boreholes, main field geological parameters of borehole operation, data on borehole overhauls carried out and formation hydraulic fracturing;
  • interpretation of borehole geophysical survey data (GIS);
  • clarification of lithofacies characteristic of continuously operating geological and technological models;
  • plotting and study of maps of current gas-water contact position;
  • preparation and issue of recommendations for preventing water breakthrough;
  • geological and geophysical support for planning of repair works based on cluster models according to borehole overhauls schedule;
  • evaluation of change of current gas saturation of reservoirs during development.

4. Independent expert evaluation of geological and geological technological models of gas fields and underground storages — evaluation of quality of geological and hydrodynamic modelling, evaluation of adaptation quality, drawing up of a report with final expert conclusion.

5. Study of efficiency of geological and technical activities (GTA) (drawing up of reports “Stage Before GTA” and “Stage at GTA and After GTA Completion”).

Study of GTA efficiency

Study of GTA efficiency

The Stage Before GTA Report includes:

  • detailed study of the borehole condition and causes of its non-availability;
  • borehole operational potential evaluation and forecast;
  • issue of GTA recommendations.

The Stage at GTA and After GTA Completion Report includes:

  • study of implementation of all GTA stages (water shut-off works, formation hydraulic fracturing etc.);
  • balance of GTA execution calendar time;
  • detailed study of borehole condition and structure after GTA;
  • study of deviations from work plan which occurred during GTA;
  • study of results and efficiency of GTA carried out;
  • forecast of operational potential and issue of recommendations for future borehole operation.
Expert review of geological technological models

Expert review of geological technological models

6. Evaluation of geological and geophysical nonuniformity of sedimentary cover based on operating boreholes survey data in order to identify objects for subsurface state monitoring when field development is monitored.

7. Summary and study of exploration and geological and geophysical works data to determine prospects for searching for new hydrocarbon deposits, calculation of reserves, planning of operational drilling and geological technological activities.

8. Geological support of drilling (geo-steering).

9. Interpretation of borehole hydrodynamic surveys; Develop of survey design and obtaining tentative pressure profile at borehole operation modes for more efficient borehole hydrodynamic surveys planning. Selection of survey methods. Processing pressure build-up, pressure stabilisation, level build-up, inflow performance relationship curves, interference test.

10. Re-interpretation and study of seismic data based on the results of 3D CDPM in order to find oil and gas storage facilities, and traps under underground gas storages.

Work-related issues discussion

Work-related issues discussion

It is worth noting that the affiliate is the developer of the software suite (SS) Geomodelirovanie, designed for building and support of continuously operating geological technological models used for monitoring of hydrocarbon field development and underground gas storages operation.

Geomodelirovanie SS includes DBMS controlled data base MS SQL Server (it is possible to use Oracle, and locally — MS Access) and a set of program modules for DB data import/export, viewing and updating, and drawing up various reports.

In Geomodelirovanie SS the general-purpose program Planshet is used for processing, interpretation of GIS data, determination of formation characteristics as well as generation of and printing geological-geophysical plane-table maps, and for automation of break-down by formations — a program for stratigraphic formations separation and correlation.

In Geomodelirovanie SS results of GIS data interpretation and priory surfaces obtained from seismic survey are input data for modelling. The first stage of modelling is construction of a frame model that is a set of formation stratigraphic boundary surfaces — tops and bottoms.

The frame model is the basis for construction of the detailed model. The detailed lithological model in Geomodelirovanie SS is a 3D cube in which each cell is characterised by a lithotype. Formation-wise split per boreholes for which spacial automatic correlation and calculation of inter-layer maps is carried out is input data for the detailed model construction. The parametric model containing petrophysical properties of reservoirs, such as porosity, sandiness, is built on the basis of detailed lithologic model.

The final stage is construction of the fluidal model consisting of a set of surfaces of initial and current contacts on different dates.

The detailed model can be used for online calculation of reserves in random boundaries: formation, deposit, invasion zone, tectonic blocks boundaries, reserve categories as well as in rocks of different types and in a limited range of collecting properties. Together with the main calculation parameters, it is possible to obtain maps of general and effective thicknesses, porosity, sandiness maps, maps of open cell volumes etc.

Geomodelirovanie SS has extensive capabilities for visualising geomodelling results. Visualisation can be both three-dimensional (3D) and two-dimensional: in the form of maps, sections, profiles, on the latter it is possible to show not only geological but also technical (borehole planes, column development and condition, perforation intervals etc.), geophysical (GIS curves), technological (depressions, yields, backflows etc.) data, as well as initial and current contact level.

Using the SS all in all about 20 facility models of the following hydrocarbon fields were built: Urengoyskoe OGCF (Cenomanian and Neocomian stages), Yamburgskoe GCF (Cenomanian and Neocomian stages), Zapolyarnoe GCF (Cenomanian and Neocomian stages), Kshukskoe GF, Yuzhno-Krylovskoe GF, Pelyatkinskoe GF, also underground gas storages: Puginskoe, Severo-Stavropolskoe (Green strata and Khadum), Stepnovskoe, Elshano-Kurdyumskoe, Nagumanovskoe, Kasimovskoe, Pelagiadinskoe, Karashurskoe, Kanchurinskoe.

Currently Gazprom PJSC subsoil users are actively using the models of the Urengoyskoe, Yamburgskoe and Zapolyarnoe hydrocarbon fields.

Subsoil user specialists use PK as a special-purpose information system to solve various field development monitoring problems. And the possibility to integrate geophysical, geological, technological and other data makes PK a convenient tool allowing for online obtaining all-round information about a facility of interest, whether a borehole, cluster, strata or the whole field.

At NPF Engineering Center, Geomodelirovanie SS is used for methodic and engineering support of works:

  • Increasing the level of deposit exploration. Confirmation of deposit geological models based on operational drilling GIS and GIS-monitoring data.
  • Information support for forecast of optimum gas production speed and search of technical solutions to increase the ratio of recovery from Cenomanian and Neocomian deposits.
  • Planning of geological and technical activities, repairs to ensure borehole operability based on comprehensive interpretation, study of GIS-monitoring results and previous works.

These works include:

  • Development of and assistance for program and methodic support of online monitoring and study of field geophysical data;
  • Development of GIS-drilling data interpretation methodic support;
  • Preparation of GIS-drilling and GIS-monitoring data base. Study and consolidation of GIS-monitoring data on operational, control boreholes, boreholes under overhauls(evaluation of current gas-water contacts, clarification of perforation intervals, operating intervals);
  • Development of criteria for justification of stratigraphy, initial and current gas saturation of reservoirs in Cenomanian deposits;
  • Construction of frame and detailed geological model;
  • Drawing up maps of initial and current gas-water contact;
  • Compilation of open scheme books;
  • Study of expansion and, based on it, identification of areas for undertaking urgent solutions to prevent water breakthrough;
  • Confirmation and adding of geological and geophysical information. Monitoring of DB information quality and completeness;
  • Confirmation of gas-water contacts location in gas boreholes (Cenomanian) as geophysical surveys and works in boreholes are carried out;
  • Forecast of borehole decommissioning due to water breakthrough;
  • Recommendations on preventive water shut-off works and overhauls of inactive boreholes;
  • Study of efficiency of borehole overhauls carried out;
  • Adaptation of fluid seal model visualisation.
Contact information:

Postal address: 71/32, Novocheriomushkinskaya St., Moscow, 117418
Tel.: (495) 719-64-14; E-mail: ic@gazpromgeofizika.ru