Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/01111715015 |
Dolomite and dolomitization of the Permian Khuff-Creservoir in Ghawar field, Saudi Arabia | |
Alqattan, Mohammed A.1; Budd, David A.2 | |
2017-10-01 | |
发表期刊 | AAPG BULLETIN
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ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2017 |
卷号 | 101期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Saudi Arabia; USA |
英文摘要 | The Permian Khuff-Creservoir in Saudi Arabia is known for its lateral and vertical heterogeneity caused mainly by dolomitization. Detailed petrographic analysis of 600 thin sections, from six cored wells, revealed three main replacive dolomite fabrics: (1) fabric-preserving mimetic (FPM), (2) fabric-preserving nonmimetic (FPNM), and (3) fabric-destructive (FD) dolomites. Crystal sizes are mostly less than or equal to 20 mm for FPM dolomite, less than or equal to 50 mm for FPNM dolomite, and less than or equal to 100 mm for FD dolomite. The FPM dolomite decreases in abundance, and FPNM dolomite increases in abundance, with increasing grain content of the facies. The delta O-18 values of dolostones (although considered an obsolete term, dolostone is used here to mean rock containing >= 80% dolomite) indicate early dolomitization at low temperatures in Permian seawater or evaporated seawater, with landward facies (mud-stone and wackestone) generally dolomitized by more evaporated waters and seaward grainy facies generally dolomitized by less evaporated, more normal marine seawaters. Stratigraphic variations in the dolostones' delta O-18 values track with facies variations through fourth-order depositional sequences and indicate that different stratigraphic bodies of dolomite formed from seawaters with different degrees of evaporation. The delta C-13 values of the dolostones exhibit temporal trends inherited from the precursor limestones. Variations in the lateral and vertical abundance of dolomite and dolomite fabrics, in the propensity for each facies to be dolomitized, and in the dolomites' oxygen isotopic values all suggest that multiple dolomitization events occurred in the Khuff-Creservoir as depositional cycles accumulated, with some dolostones overprinted by younger events. Average porosities of grain-rich dolostones are greater than those of mud-rich dolostones, indicating that depositional facies preordained porosity distribution within the dolostones. However, the more evaporated the dolomitizing fluid, the more likely dolomitization resulted in lower porosity regardless of facies. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410656600006 |
WOS关键词 | SULTANATE-OF-OMAN ; RESERVOIR QUALITY ; STRATIGRAPHIC FRAMEWORK ; OUTCROP-EQUIVALENTS ; TRIASSIC CARBONATES ; OFFSHORE IRAN ; MIDDLE-EAST ; GAS-FIELD ; MOUNTAINS ; EVOLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24615 |
专题 | 地球科学 |
作者单位 | 1.Saudi Aramco, Explorat Tech Serv Dept, 728 Eastern Ave, Dhahran 31311, Saudi Arabia; 2.Univ Colorado, Dept Geol Sci, Campus Box 399, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Alqattan, Mohammed A.,Budd, David A.. Dolomite and dolomitization of the Permian Khuff-Creservoir in Ghawar field, Saudi Arabia[J]. AAPG BULLETIN,2017,101(10). |
APA | Alqattan, Mohammed A.,&Budd, David A..(2017).Dolomite and dolomitization of the Permian Khuff-Creservoir in Ghawar field, Saudi Arabia.AAPG BULLETIN,101(10). |
MLA | Alqattan, Mohammed A.,et al."Dolomite and dolomitization of the Permian Khuff-Creservoir in Ghawar field, Saudi Arabia".AAPG BULLETIN 101.10(2017). |
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