Kazakhstan journal for oil & gas industry

2707-42262957-806X

KMG Engineering

108782

10.54859/kjogi108782

Research Article

New Integral Neutron-Neutron Logging for Cement Integrity Analysis of any Backfilling

Polyachenko

Lyudmila B.

Cand. Sc. (Physical and Mathematical)l_polyachenko@int-geos.ruhttps://orcid.org/0009-0006-0498-896XPolyachenko

Anatoly L.

Doct. Sc. (Physics and Mathematics)a_polyachenko@int-geos.ruhttps://orcid.org/0009-0009-6523-1479Egurtsov

Sergey A.

s_egurtsov@int-geos.ruhttps://orcid.org/0009-0004-6341-8305Ivanov

Yuri V.

Cand. Sc. (Engineering)y_ivanov@int-geos.ruhttps://orcid.org/0009-0001-9888-4304

Oil & Gas Technology Institute «Geo-Spectrum»

15122024

6498111

16092024

10122024

2024

Background: The article presents a new technology of integral neutron-neutron logging technology for cement integrity analysis (hereinafter – NNL-C) of wells in hydrocarbon fields, developed by GeoSpectr Oil and Gas Technology Institute (Russia). NNL-C is designed to ensure the quality of well cementing focusing on the condition, integrity and leak tightness of any type and density of cement casing (including light cement). It can be used in any kind of well filling whether liquid, gas, or a mixture. NNL-C is applicable at all stages of the oil and gas well lifecycle – from construction to operation – without well-kill operation and tubing removal. This technology is free from the major limitations of standard (conventional) gamma-gamma and acoustic logging techniques for cement integrity evaluation. Aim: The purpose of the NNL-C is to offer a prompt and cost-effective evaluation of the integrity or failure of cementing in any active wells. In contrast to NNL-C, the standard methods for analyzing cement integrity are inadequate for this purpose, as they cannot be applied to lightweight cement, tubing wells, or gas-filled wells. Materials and methods: The science behind, methodology, and interpretation software for NNL-C were developed employing mathematical modeling. This technology hs been tested against measurement data from real wells. Results: The NNL-C method was tested in 12 and tried in more than 20 wells, demonstrating a good correlation with standard methods and achieving high accuracy of cement-bond logging. The possibility of quantifying cement under field conditions was confirmed in scenarios where standard cement-bond logging techniques are typically not applicable, such as in tubing wells, gas-filled wells, and during the use of lightweight cement. The NNL-C technology has been successfully implemented in Kazakhstan at the Kozhasai and Alibekmola oil and gas condensate fields, as well as the Bozoi underground gas storage facility. Conclusion: The technology provides reliable, accurate, and cost-effective information on the quality of cementing of wells under construction such as condition, integrity and tightness of cementing (cement sheath) of production wells.

neutron-neutron cement-bond loggingcement sheathcementing controllightweight cementcement diagnosticscement integritywell tightness

нейтрон-нейтронды цементометрияцемент бекіткішіцементтеуді бақылаужеңіл цементцемент күйін диагностикалауцемент тасының тұтастығыұңғыманың тығыздығы

нейтрон-нейтронная цементометрияцементная крепьконтроль цементированияоблегченный цементдиагностика состояния цементацелостность цементного камнягерметичность скважины

Kuznetsov OL, Polyachenko AL. Skvazhinnaya yadernaya geofizika: spravochnik geofizika. 2-e izd. Moscow: Nedra; 1990. 318 p. (In Russ).

Skovorodnikov IG. Geofizicheskiye issledovaniya skvazhin. 3-e izd. Ekaterinburg: Institut ispytaniy; 2009. 471 p. (In Russ).

slb.ru [Internet]. ООО «Технологическая компания Шлюмберже» [cited 2 March 2024]. Available from: https://www.slb.ru.

Polyachenko AL, editor. Metodicheskiye rekomendatsii po primeneniyu tekhnologii i metodiki mul'timetodnogo mnogozondovogo neytronnogo karotazha dlya opredeleniya gazonasyshchennosti plastov-kollektorov v obsazhennykh skvazhinakh neftegazokondensatnykh mestorozhdeniy i podzemnykh khranilishch gaza. Tver': PoliPRESS; 2022. 204 p. (In Russ).

Polyachenko AL, editor. Metodicheskiye rekomendatsii po primeneniyu tekhnologii i metodiki neytron-neytronnoy tsementometrii deystvuyushchikh skvazhin neftegazokondensatnykh mestorozhdeniy i podzemnykh khranilishch gaza (tekhnologiya NNK-C). Moskva-Tver': PoliPRESS; 2023. 88 p. (In Russ).

Mckinney G (Los Alamos National Laboratory). MCNP – A general Monte Carlo code n-particle transport code, Version 5. X-5 Monte Carlo Team; 2000 March. Report No.: LA-13709-M.

Svidetel'stvo o gosudarstvennoy registratsii programmy dlya EVM RU 2021610817/ 19.01.21. Byul. №1. Polyachenko AL, Babkin IV, Polyachenko LB. Vektornaya programma dlya mnogogruppovogo setochnogo modelirovaniya poley, pokazaniy i paletok metodov yadernogo karotazha v vertikal'nykh i naklonno-gorizontal'nyh skvazhinah (programma «POLE»). Available from: https://new.fips.ru/registers-doc-view/fips_servlet?DB=EVM&DocNumber=2021610817&TypeFile=html. (In Russ).

Patent RUS № 2778620/ 22.08.22. Byul. №24. Polyachenko AL, Polyachenko LB, Polyachenko YA, et al. Metod nejtron-nejtronnoj cementometrii (NNK C) dlya kontrolya kachestva cementirovaniya oblegchennymi i obychnymi cementami stroyashchihsya skvazhin i sostoyaniya cementnogo kamnya ekspluatiruemyh neftegazovyh skvazhin, zapolnennyh lyubymi tipami flyuidov. Available from: https://www1.fips.ru/registers-doc-view/fips_servlet?DB=RUPAT&DocNumber=2778620&TypeFile=html. (In Russ).

Svidetel'stvo o gosudarstvennoy registratsii programmy dlya EVM RUS № 2021613443/ 09.03.21. Byul. №9. GeoSpektr. Programma interpretatsii dannykh neytronnoy tsementometrii pri issledovanii obsazhennykh skvazhin neftegazokondensatnykh mestorozhdeniy apparaturoy mul'timetodnogo mnogozondovogo neytronnogo karotazha – MMNK (programma «N-Cement»). Available from: https://www1.fips.ru/registers-doc-view/fips_servlet?DB=EVM&DocNumber=2019661276&TypeFile=html. (In Russ).

10.

Svidetel'stvo o gosudarstvennoy registratsii bazy dannyhh RUS № 2022622979/ 21.11.22. Byul. №12. GeoSpektr. Baza dannykh interpretacionnykh paletochnykh zavisimostey dlya neytron-neytronnoy tsementometrii NNK-C v obsazhennykh gazovykh skvazhinakh «DB_NNK-CEMENT». Available from: https://www1.fips.ru/registers-doc-view/fips_servlet?DB=DB&DocNumber=2022622979&TypeFile=html. (In Russ).