{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T12:46:18Z","timestamp":1790685978842,"version":"4.1.0"},"reference-count":31,"publisher":"American Chemical Society (ACS)","issue":"9","license":[{"start":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T00:00:00Z","timestamp":1771804800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100020361","name":"College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100020361","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,3,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Optimization of cement slurry composition during well cementing jobs is highly critical to preserve well integrity under sour gas environments. This research focuses on the application potential of a hybrid bentonite-zeolitic imidazolate framework-67 (abbreviated as Bent\/ZIF-67) as a hydrogen sulfide (H2S) scavenger for wellbore cementing. The performance of this new scavenger material has been tested and compared with that of the conventional scavenger material (i.e., triazine) based on the mechanical properties results and the amount of H2S gas captured. The compressive strength results clearly showed enhanced performance of Bent\/ZIF-67 over the conventional scavenger material with an increase of 14-day and 28-day compressive strengths of around 8\u201310% at the optimal dosage of 0.05% BWOC (i.e., by weight of cement). The tensile strength showed even more remarkable enhancements of 25\u201345% over the conventional material at various concentrations of Bent\/ZIF-67. This clearly supports the enhancement of cement matrix strength after the addition of this new material. The elastic property measurement showed that there are reductions of around 7.5% and increments of around 2.6% in Young\u2019s modulus and Poisson\u2019s ratios of the cement matrix after the addition of this proposed new material. Most importantly, H2S scavenging tests showed dramatic gains, where the breakthrough time of H2S was delayed from \u223c12 min in neat cement to over an hour with Bent\/ZIF-67, while the time to reach 2 ppm outlet concentration was extended to \u223c3.8 h, outperforming triazine (\u223c2.9 h). These results confirmed that Bent\/ZIF-67 significantly enhanced both mechanical strength and sour-gas resistance of cement, making it a promising additive for improving well integrity in H2S-rich reservoirs.<\/jats:p>","DOI":"10.1021\/acsomega.5c12838","type":"journal-article","created":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T07:16:52Z","timestamp":1771831012000},"page":"15354-15364","source":"Crossref","is-referenced-by-count":1,"title":["Hybrid Bentonite-Zeolitic\nImidazolate Framework Additive\nas an H2S Scavenger and Strength Enhancer for Class G Oil-Well\nCement"],"prefix":"10.1021","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-4096-9486","authenticated-orcid":true,"given":"Omer","family":"Bakri","sequence":"first","affiliation":[{"name":"King Fahd University of Petroleum & Minerals , , ,","place":["Dhahran, Saudi Arabia, 31261"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed I.","family":"Ibrahim","sequence":"additional","affiliation":[{"name":"King Fahd University of Petroleum & Minerals (KFUPM) , , ,","place":["Dhahran, Saudi Arabia, 31261"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6703-9001","authenticated-orcid":true,"given":"Ahmed Abdulhamid","family":"Mahmoud","sequence":"additional","affiliation":[{"name":"King Fahd University of Petroleum & Minerals , , ,","place":["Dhahran, Saudi Arabia, 31261"]},{"name":"King Fahd University of Petroleum & Minerals , , ,","place":["Dhahran, Saudi Arabia, 31261"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6674-4542","authenticated-orcid":true,"given":"Sagheer A.","family":"Onaizi","sequence":"additional","affiliation":[{"name":"King Fahd University of Petroleum & Minerals , , ,","place":["Dhahran, Saudi Arabia, 31261"]},{"name":"King Fahd University of Petroleum and Minerals , , ,","place":["Dhahran, Saudi Arabia, 31261"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,2,23]]},"reference":[{"issue":"49","key":"2026081508104854000_cit1","doi-asserted-by":"publisher","first-page":"46738","DOI":"10.1021\/acsomega.3c05740","article-title":"Experimental Investigation of Using\nManganese Monoxide as a Hydrogen Sulfide Scavenger for Aqueous Drilling\nFluids","volume":"8","author":"Ahmed","year":"2023","journal-title":"ACS Omega"},{"issue":"4","key":"2026081508104854000_cit2","doi-asserted-by":"publisher","first-page":"729","DOI":"10.3390\/coatings13040729","article-title":"Study on the Oil Well\nCement-Based Composites to Prevent Corrosion by Carbon Dioxide and\nHydrogen Sulfide at High Temperature","volume":"13","author":"Tan","year":"2023","journal-title":"Coatings"},{"key":"2026081508104854000_cit3","doi-asserted-by":"publisher","DOI":"10.1016\/j.petrol.2020.108201","article-title":"Overview of\nthe Lightweight Oil-Well Cement Mechanical\nProperties for Shallow Wells","volume":"198","author":"Adjei","year":"2021","journal-title":"J. Pet. Sci. Eng."},{"key":"2026081508104854000_cit4","doi-asserted-by":"publisher","DOI":"10.2118\/207015-MS","article-title":"Assurance of Long-Term\nWell Integrity in Highly Corrosive Downhole Environment","volume-title":"SPE Annual Caspian Technical Conference","author":"Khattak","year":"2021"},{"key":"2026081508104854000_cit5","doi-asserted-by":"publisher","DOI":"10.2118\/201840-MS","article-title":"The Cement Slurry\nand Technology of the Cementing for Environments Abnormally High Content\nof Hydrogen Sulfide","volume-title":"SPE Russian Petroleum\nTechnology Conference","author":"Utkin","year":"2020"},{"issue":"4","key":"2026081508104854000_cit6","doi-asserted-by":"publisher","first-page":"1661","DOI":"10.3390\/su16041661","article-title":"Addressing Hydrogen Sulfide Corrosion\nin Oil and Gas Industries: A Sustainable Perspective","volume":"16","author":"Vakili","year":"2024","journal-title":"Sustainability"},{"issue":"3","key":"2026081508104854000_cit7","doi-asserted-by":"publisher","first-page":"570","DOI":"10.3390\/en13030570","article-title":"A Review of Rheological\nModeling of Cement Slurry in Oil Well Applications","volume":"13","author":"Tao","year":"2020","journal-title":"Energies (Basel)."},{"issue":"5","key":"2026081508104854000_cit8","article-title":"Effect of Hydrogen\nSulphide Emissions on Cement Mortar Specimens","volume":"43","author":"Idriss","year":"2001","journal-title":"Can. Biosyst. Eng."},{"key":"2026081508104854000_cit9","doi-asserted-by":"publisher","first-page":"299","DOI":"10.1016\/j.ijggc.2014.02.013","article-title":"Rate of\nH2S and CO2 Attack on Pozzolan-Amended Class H Well Cement under Geologic\nSequestration Conditions","volume":"27","author":"Zhang","year":"2014","journal-title":"International Journal\nof Greenhouse Gas Control"},{"key":"2026081508104854000_cit10","doi-asserted-by":"publisher","DOI":"10.1016\/j.petrol.2021.108737","article-title":"Investigating\nthe Souring Mechanism in Two Giant Carbonate Oil Reservoirs, Southwestern\nIran","volume":"204","author":"Zahmatkeshan","year":"2021","journal-title":"J. Pet. Sci. 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