Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin
The second member of Sangonghe formation in M area, Junggar basin is a typical sandstone reservoir with low oil saturation. The oil heterogeneity in the upper vertical sandstone body is obvious, and the relationship between four properties is unclear, which increases the difficulty of reservoir effe...
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Editorial Office of Well Logging Technology
2023-08-01
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| Series: | Cejing jishu |
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| author | HE Aoting YAN Jianping HUANG Lisha DING Minghai LUO Guangdong SONG Dongjiang |
| author_facet | HE Aoting YAN Jianping HUANG Lisha DING Minghai LUO Guangdong SONG Dongjiang |
| author_sort | HE Aoting |
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| description | The second member of Sangonghe formation in M area, Junggar basin is a typical sandstone reservoir with low oil saturation. The oil heterogeneity in the upper vertical sandstone body is obvious, and the relationship between four properties is unclear, which increases the difficulty of reservoir effectiveness evaluation and fluid identification. Based on the oil test results, oil-bearing description, thin section of rock, physical property test, high pressure mercury injection and well logging data, oil heterogeneity is characterized and oil-bearing strips are divided. The relationship between different oil strips and their lithology, physical property and electrical response is analyzed and determined. The results show that the strips of different oil-bearing levels in a single sandstone body in the second member of the Sangonghe formation are frequently interbedded. According to the information of oil test results and oil-bearing level, three categories and five subcategories of oil-bearing strips (I1, I2, II1, II2 and III) can be divided. Type I strips are mainly pure fine sandstone and coarse sandstone, with high structural maturity, large pore throat radius, good physical properties, porosity is greater than 11.0%, permeability is greater than 7.0mD; the type II strips fine sandstone and medium-fine sandstone are in the majority, and the porosity and permeability are distributed in 6.0% ~ 11.0% and 0.2 ~ 7.0mD; the type III strips is mostly fine sandstone (containing calcareous/argillaceous/silty), and the pores structure are not developed. Acoustic and deep induction resistivity are used to identify the differences in physical properties and fluid between the strips. Among them, the type I strips acoustic is greater than 68.5μs/ft, the I1 class strips deep induction resistivity range from 14.0to 18.5Ω・m, class I2 strips with less than 14.0Ω・m. The fine division of oil-bearing strips can effectively characterize the oil-bearing heterogeneity in low oil saturation sandstone reservoirs, and clarify its relationship with lithology, physical properties and electrical response, which also provides a basis for reservoir effectiveness evaluation, fluid property identification and reserve calculation. |
| format | Article |
| id | doaj-art-3dbecb75f2e24237a0336fe8d98b3f70 |
| institution | Kabale University |
| issn | 1004-1338 |
| language | zho |
| publishDate | 2023-08-01 |
| publisher | Editorial Office of Well Logging Technology |
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| series | Cejing jishu |
| spelling | doaj-art-3dbecb75f2e24237a0336fe8d98b3f702025-08-20T03:47:40ZzhoEditorial Office of Well Logging TechnologyCejing jishu1004-13382023-08-0147447648510.16489/j.issn.1004-1338.2023.04.0131004-1338(2023)04-0476-10Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar BasinHE Aoting0YAN Jianping1HUANG Lisha2DING Minghai3LUO Guangdong4SONG Dongjiang5School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, ChinaDrilling Engineering Company, PetroChina Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaDrilling Engineering Company, PetroChina Daqing Oilfield, Daqing, Heilongjiang 163712, ChinaShandong Ruilin Energy Technology Co. Ltd., Dongying, Shandong 257000, ChinaThe second member of Sangonghe formation in M area, Junggar basin is a typical sandstone reservoir with low oil saturation. The oil heterogeneity in the upper vertical sandstone body is obvious, and the relationship between four properties is unclear, which increases the difficulty of reservoir effectiveness evaluation and fluid identification. Based on the oil test results, oil-bearing description, thin section of rock, physical property test, high pressure mercury injection and well logging data, oil heterogeneity is characterized and oil-bearing strips are divided. The relationship between different oil strips and their lithology, physical property and electrical response is analyzed and determined. The results show that the strips of different oil-bearing levels in a single sandstone body in the second member of the Sangonghe formation are frequently interbedded. According to the information of oil test results and oil-bearing level, three categories and five subcategories of oil-bearing strips (I1, I2, II1, II2 and III) can be divided. Type I strips are mainly pure fine sandstone and coarse sandstone, with high structural maturity, large pore throat radius, good physical properties, porosity is greater than 11.0%, permeability is greater than 7.0mD; the type II strips fine sandstone and medium-fine sandstone are in the majority, and the porosity and permeability are distributed in 6.0% ~ 11.0% and 0.2 ~ 7.0mD; the type III strips is mostly fine sandstone (containing calcareous/argillaceous/silty), and the pores structure are not developed. Acoustic and deep induction resistivity are used to identify the differences in physical properties and fluid between the strips. Among them, the type I strips acoustic is greater than 68.5μs/ft, the I1 class strips deep induction resistivity range from 14.0to 18.5Ω・m, class I2 strips with less than 14.0Ω・m. The fine division of oil-bearing strips can effectively characterize the oil-bearing heterogeneity in low oil saturation sandstone reservoirs, and clarify its relationship with lithology, physical properties and electrical response, which also provides a basis for reservoir effectiveness evaluation, fluid property identification and reserve calculation.https://www.cnpcwlt.com/#/digest?ArticleID=5516reservoir with low oil saturationoil heterogeneitysangonghe formationelectrical responseoil-bearing stripjunggar basin |
| spellingShingle | HE Aoting YAN Jianping HUANG Lisha DING Minghai LUO Guangdong SONG Dongjiang Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin Cejing jishu reservoir with low oil saturation oil heterogeneity sangonghe formation electrical response oil-bearing strip junggar basin |
| title | Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin |
| title_full | Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin |
| title_fullStr | Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin |
| title_full_unstemmed | Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin |
| title_short | Oil Heterogeneity Characteristics of Low Oil Saturation Sandstone Reservoirs in M Area of Junggar Basin |
| title_sort | oil heterogeneity characteristics of low oil saturation sandstone reservoirs in m area of junggar basin |
| topic | reservoir with low oil saturation oil heterogeneity sangonghe formation electrical response oil-bearing strip junggar basin |
| url | https://www.cnpcwlt.com/#/digest?ArticleID=5516 |
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