Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/03141817262 |
Determining the porosity exponent m and lithology factor a for sandstones and their control by overburden pressure: A case study from the Gulf of Suez, Egypt | |
El Sharawy, Mohamed S.; Nabawy, Bassem S. | |
2018-09-01 | |
发表期刊 | AAPG BULLETIN
![]() |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2018 |
卷号 | 102期号:9页码:1893-1910 |
文章类型 | Article |
语种 | 英语 |
国家 | Egypt |
英文摘要 | The porosity exponent m represents an important parameter in Archie's equation; it is routinely used in well logging interpretation and formation evaluation. It reflects some petrophysical rock properties, such as the petrofabrics, pore fabrics, and overburden pressure (OBP). Data measured at ambient conditions for a total of 55 sandstone core samples were obtained from 8 wells varying in depositional facies, geologic age, degree of consolidation, and cementation material and then measured again at OBP, similar to the actual reservoir conditions, to check the effect of OBP on Archie's parameters and to introduce a model of high reliability. Other published data sets were also used to confirm the study results. Based on the best-fit regression analysis, several empirical relationships were introduced to relate the porosity exponent to pore volume, lithology factor, and permeability. The effect of OBP on the porosity exponent was also investigated in relation to the petrophysical parameters. Given the above, a new statistical model is proposed to relate the porosity exponent to the permeability of the studied sandstone samples in the Gulf of Suez, Egypt. The effect of confining pressure on the studied porosity exponent m and the lithology factor a is significant when porosity phi is less than or equal to 10%. From the present study, categorization of the studied samples into flow units and rock types using the hydraulic flow unit and the discrete rock types increased the reliability of the obtained relationships and increased the applicability of the obtained equations. In addition, the value of the lithology factor a fluctuates around 1 (0.92-1.04, regardless of the applied processing method), whereas the value of the porosity exponent m fluctuates around 1.83. The obtained relationships between the formation resistivity factor and porosity have a very high reliability (-0.949 >= correlation coefficient >= -0.969). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445705200010 |
WOS关键词 | ELECTRICAL-CONDUCTIVITY ; CEMENTATION FACTOR ; ARCHIES EQUATION ; WATER SATURATION ; PERMEABILITY ; ROCKS ; PORE ; RESERVOIRS ; DESERT ; MODEL |
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/24388 |
专题 | 地球科学 |
作者单位 | Natl Res Ctr, Dept Geophys Sci, 33 El Bohouth St, Cairo 12622, Egypt |
推荐引用方式 GB/T 7714 | El Sharawy, Mohamed S.,Nabawy, Bassem S.. Determining the porosity exponent m and lithology factor a for sandstones and their control by overburden pressure: A case study from the Gulf of Suez, Egypt[J]. AAPG BULLETIN,2018,102(9):1893-1910. |
APA | El Sharawy, Mohamed S.,&Nabawy, Bassem S..(2018).Determining the porosity exponent m and lithology factor a for sandstones and their control by overburden pressure: A case study from the Gulf of Suez, Egypt.AAPG BULLETIN,102(9),1893-1910. |
MLA | El Sharawy, Mohamed S.,et al."Determining the porosity exponent m and lithology factor a for sandstones and their control by overburden pressure: A case study from the Gulf of Suez, Egypt".AAPG BULLETIN 102.9(2018):1893-1910. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论