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Implication of well logs for evaluation of a carbonate reservoir: an example, the Sarvak Formation, Zagros Basin, SW Iran | ||
| Geopersia | ||
| مقاله 5، دوره 12، شماره 1 - شماره پیاپی 22287825، فروردین 2022، صفحه 69-87 اصل مقاله (13.29 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/geope.2021.325668.648622 | ||
| نویسندگان | ||
| Moosa Esfandyari؛ Hassan Mohseni* | ||
| Department of Geology, Faculty of Sciences, Bu-Ali Sina University, Hamedan Iran | ||
| چکیده | ||
| Petrophysical evaluation of well log data of the Mid Cretaceous rocks (Upper part of the Sarvak Formation) were conducted for the Marun oil field. Rock and fluid volumetric indices, such as porosity type and distribution, water saturation, and lithology, were estimated from density, resistivity, neutron porosity, sonic and gamma ray logs. Petrophysical parameters including shale volume (Vsh), total porosity (PHT), effective porosity (PHE), water saturation (Sw), hydrocarbon saturation (Sh) and lithology were calculated. Matrix Identification (MID), M-N, NPHI- RHOB, NPHI- DT cross-plots indicated that the Sarvak Formation is mainly composed of carbonate lithology. Results also indicated that shale volume varies between 0.1% and 23.3%; total and effective porosities are between 0.8% and 47.2% and between 0.1% and 45.1%, respectively. Various primary and secondary porosities do exist in the Sarvak Formation. Majority of the porosities are preferentially developed in the middle part of this oil field. Water saturation is between 2% and 100%. The results reveal that the reservoir characterization of the Sarvak Formation is very variable and fluctuating from poor to good reservoir units. Apparently, Sw increase toward the center of the reservoir and eastward as well. This is probably in part controlled by fractures that are preferentially concentrated in the middle part of the anticline. | ||
| کلیدواژه‌ها | ||
| petrophysical parameters؛ formation evaluation؛ well log analysis؛ reservoir geology؛ water saturation | ||
| عنوان مقاله [English] | ||
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