Scientific and technical journal

«Geology, geophysics and development of oil and gas fields»

ISSN 2413-5011

Geology, geophysics and development of oil and gas fields
An approach to hydrodynamic modeling of the organic matter transformation process of the Upper Jurassic formation in the Western Siberia under the influence of hydrocarbon solvents and temperature (based on the results of laboratory experiments on core). Part 3. Substantiation of the model of chemical transformations and carrying out predictive hydrodynamic calculations on the sector model

UDC: 622.276.031:532.5:550.832.3
DOI: 10.33285/2413-5011-2022-9(369)-82-89

Authors:

NIKOLAEVA TATIANA N.1,
METT DMITRIY A.1,
NEMOVA VARVARA D.1

1 LUKOIL-Engineering LLC, Moscow, Russia

Keywords: cyclic treatment, chemical transformation model, downhole heater, synthetic oil, thermal destruction of kerogen, technological potential, pyrolytic studies, pentane-hexane mixture, mesh refinement

Annotation:

The work is a continuation of a series of articles describing an approach to hydrodynamic modeling of kerogen conversion process into synthetic hydrocarbons and their extraction by a hydrocarbon solvent, namely, a pentane-hexane mixture (PGM). The article describes the final stages of the model creation process, discusses the methodology for debugging a chemical transformation model (CTM) for the permeable and impermeable parts of the section.

Data obtained from a combination of laboratory experiments in autoclaves and pyrolytic studies of the rocks of the target reservoir were used to adjust the model. The authors considered an approach to adjusting the reaction of kerogen thermal degradation to such pyrolytic parameters as the values of the S2 pyrolytic parameter of the extracted initial sample and the difference between the values of the S2 parameters of the extracted initial sample and S2 of the extracted sample after thermal treatment in an autoclave. In other words, the residual generation potential of source rock organic matter and its technologically recoverable potential are chosen as data for the model matching.

The article also presents an approach to modeling the heating of horizontal wells bottomhole zone by a downhole heater after a multi-stage hydraulic fracturing (MSHF). The authors justified the approach to modeling hydraulic fractures and refinement of model cells near the well.

In conclusion, predictive hydrodynamic calculations were carried out on a sector model for downhole heating of the Upper Jurassic deposits with extraction of generated synthetic oil with a hydrocarbon solvent. As part of the calculations, several variants of cyclic treatment were tested, the effect of the number of solvent injection cycles, the volume of the injected agent and the duration of the HC withdrawal stage on the efficiency of the technology were studied. The analysis of the results obtained showed the reliability of the proposed approach to building a model, which, in turn, allows predicting the volume of synthetic hydrocarbons obtained as a result of the kerogen conversion from permeable and impermeable rocks as well as changes of their reservoir properties.

Bibliography:

1. Mett D.A., Nikolaeva T.N. Podkhod k gidrodinamicheskomu modelirovaniyu protsessa preobrazovaniya pod deystviem uglevodorodnykh rastvoriteley i temperatury organicheskogo veshchestva verkhneyurskoy formatsii Zapadnoy Sibiri (s oporoy na rezul’taty laboratornykh eksperimentov na kerne). Chast’ 1. Formirovanie neobkhodimykh dannykh dlya modelirovaniya // Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2022. – № 6(366). – S. 35–40 – DOI: 10.33285/2413-5011-2022-6(366)-35-40

2. Nikolaeva T.N., Mett D.A. Obosnovanie minimal’nogo neobkhodimogo kolichestva laboratornykh issledovaniy dlya vozdeystviya teplovymi i gazovymi metodami na plasty verkhneyurskikh otlozheniy na primere rascheta analiza chuvstvitel’nosti v gidrodinamicheskoy modeli sadaptirovannogo eksperimenta. Chast’ 2 // Neftepromyslovoe delo. – 2021. – № 5(629). – S. 39–42. – DOI: 33285/0207-2351-2021-5(629)-39-42

3. Mett D.A., Nikolaeva T.N. Razrabotka metodiki modelirovaniya vykhoda sinteticheskoy nefti s ispol’zovaniem piroliticheskikh parametrov OV porod bazhenovskoy svity // Ekspozitsiya Neft’ Gaz. – 2018. – № 4(64). – S. 34–36.

4. Nikolaeva T.N., Mett D.A. Podkhod k gidrodinamicheskomu modelirovaniyu protsessa preobrazovaniya pod deystviem uglevodorodnykh rastvoriteley i temperatury organicheskogo veshchestva verkhneyurskoy formatsii Zapadnoy Sibiri (s oporoy na rezul’taty laboratornykh eksperimentov na kerne). Chast’ 2. Sozdanie gidrodinamicheskoy modeli // Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2022. – № 8(368). – S. 24–29.– DOI: 10.33285/2413-5011-2022-8(368)-24-29

5. Peters K.E., Burnham A.K., Walters C.C. Petroleum generation kinetics: Single versus multiple heating-ramp open-system pyrolysis. – Schlumberger, K.E.P., 2015. – Pp. 591–616.

6. Balans uglevodorodnykh soedineniy neftyanogo ryada v pirolizuemom organicheskom veshchestve bazhenovskoy svity / E.V. Kozlova [i dr.] // Neft. khoz-vo. – 2017. – № 3. – S. 18–21. – DOI: 10.24887/0028-2448-2017-3-18-21