Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China
Organic-rich shales in between salt rock layers distribute widely in Qianjiang Sag, Jianghan Basin, central China. Due to the complexity of matrix mineral components and their distribution and tight pore structure, Archie’s law cannot be used directly to calculate oil saturation in those shale oil r...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/9989866 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849686963705085952 |
|---|---|
| author | Xin Nie Jing Lu Jingyuan Chi Peilin Wang Chaomo Zhang |
| author_facet | Xin Nie Jing Lu Jingyuan Chi Peilin Wang Chaomo Zhang |
| author_sort | Xin Nie |
| collection | DOAJ |
| description | Organic-rich shales in between salt rock layers distribute widely in Qianjiang Sag, Jianghan Basin, central China. Due to the complexity of matrix mineral components and their distribution and tight pore structure, Archie’s law cannot be used directly to calculate oil saturation in those shale oil reservoirs. A new oil content model for shale oil reservoirs was introduced. By analyzing the logging and core experimental data from Qianjiang Sag, Jianghan Oilfield, we built the relationship between kerogen and the different well logging porosities including nuclear magnetic resonance (NMR) porosity, neutron porosity, and density porosity. And we used the dual-Vsh method to calculate the total organic carbon (TOC). After calculating the volume fraction of the solid organic matters and separating it from the TOC, we acquired the hydrocarbon fluid content in the formations. The calculated oil content results are coherent with the core experimental data, which indicates the efficiency of this model. This model is simple and can be quickly applied. However, this method also shows its weakness in calculation precision when the TOC is not calculated precisely or the quality of the porosity logs is low. |
| format | Article |
| id | doaj-art-01a5dec09aa945888544b9e624e21bc2 |
| institution | DOAJ |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-01a5dec09aa945888544b9e624e21bc22025-08-20T03:22:30ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/99898669989866Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, ChinaXin Nie0Jing Lu1Jingyuan Chi2Peilin Wang3Chaomo Zhang4Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan, Hubei 430100, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaJilin Branch, China Petroleum Logging (CPL) Co., Ltd., Songyuan 138000, ChinaResearch Institute of Exploration and Development, Northwest Oilfield Company, SINOPEC, Urumchi 841100, ChinaKey Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan, Hubei 430100, ChinaOrganic-rich shales in between salt rock layers distribute widely in Qianjiang Sag, Jianghan Basin, central China. Due to the complexity of matrix mineral components and their distribution and tight pore structure, Archie’s law cannot be used directly to calculate oil saturation in those shale oil reservoirs. A new oil content model for shale oil reservoirs was introduced. By analyzing the logging and core experimental data from Qianjiang Sag, Jianghan Oilfield, we built the relationship between kerogen and the different well logging porosities including nuclear magnetic resonance (NMR) porosity, neutron porosity, and density porosity. And we used the dual-Vsh method to calculate the total organic carbon (TOC). After calculating the volume fraction of the solid organic matters and separating it from the TOC, we acquired the hydrocarbon fluid content in the formations. The calculated oil content results are coherent with the core experimental data, which indicates the efficiency of this model. This model is simple and can be quickly applied. However, this method also shows its weakness in calculation precision when the TOC is not calculated precisely or the quality of the porosity logs is low.http://dx.doi.org/10.1155/2021/9989866 |
| spellingShingle | Xin Nie Jing Lu Jingyuan Chi Peilin Wang Chaomo Zhang Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China Geofluids |
| title | Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China |
| title_full | Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China |
| title_fullStr | Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China |
| title_full_unstemmed | Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China |
| title_short | Oil Content Prediction Method Based on the TOC and Porosity of Organic-Rich Shales from Wireline Logs: A Case Study of Lacustrine Intersalt Shale Plays in Qianjiang Sag, Jianghan Basin, China |
| title_sort | oil content prediction method based on the toc and porosity of organic rich shales from wireline logs a case study of lacustrine intersalt shale plays in qianjiang sag jianghan basin china |
| url | http://dx.doi.org/10.1155/2021/9989866 |
| work_keys_str_mv | AT xinnie oilcontentpredictionmethodbasedonthetocandporosityoforganicrichshalesfromwirelinelogsacasestudyoflacustrineintersaltshaleplaysinqianjiangsagjianghanbasinchina AT jinglu oilcontentpredictionmethodbasedonthetocandporosityoforganicrichshalesfromwirelinelogsacasestudyoflacustrineintersaltshaleplaysinqianjiangsagjianghanbasinchina AT jingyuanchi oilcontentpredictionmethodbasedonthetocandporosityoforganicrichshalesfromwirelinelogsacasestudyoflacustrineintersaltshaleplaysinqianjiangsagjianghanbasinchina AT peilinwang oilcontentpredictionmethodbasedonthetocandporosityoforganicrichshalesfromwirelinelogsacasestudyoflacustrineintersaltshaleplaysinqianjiangsagjianghanbasinchina AT chaomozhang oilcontentpredictionmethodbasedonthetocandporosityoforganicrichshalesfromwirelinelogsacasestudyoflacustrineintersaltshaleplaysinqianjiangsagjianghanbasinchina |