Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin
A complete technical system of gas field rolling exploration such as target search, evaluation and drilling was introduced to promote the development of the deep-water marginal gas field A in the central canyon of the Qiongdongnan Basin. In addition to the traditional target search technology of oil...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Petroleum Geology and Experiment
2024-01-01
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| Series: | Shiyou shiyan dizhi |
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| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401001 |
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| author | Kui CHEN Desheng HU Ruiyou SONG Yu GONG Dazhi XIAO Anmin HUANG Yushuang ZHU |
| author_facet | Kui CHEN Desheng HU Ruiyou SONG Yu GONG Dazhi XIAO Anmin HUANG Yushuang ZHU |
| author_sort | Kui CHEN |
| collection | DOAJ |
| description | A complete technical system of gas field rolling exploration such as target search, evaluation and drilling was introduced to promote the development of the deep-water marginal gas field A in the central canyon of the Qiongdongnan Basin. In addition to the traditional target search technology of oil and gas potential in the zone, a target search technology of evaluation process was proposed for the marginal gas field A. A total of five potential oil and gas blocks were searched, and the structure A4 was selected for oil and gas target evaluation. The main controlling factors of hydrocarbon accumulation in the structure A4 were studied from two aspects: trap interpretation and implementation, and trap hydrocarbon detection. The predicted dominant gas-bearing areas in the central part of structure A4 have favorable gas-bearing information characteristics such as strong amplitude attributes, low density, low velocity, low P-wave impedance, and low P-wave and S-wave velocity ratios. They were generally classified as class Ⅲ AVO anomaly, which can upgrade the HL_0 gas group to control natural gas geological reserves. The rolling exploration well A4-1 was drilled, encountering a gas layer of over 20 m in the Huangliu Formation, and a suspicious gas layer of nearly 10 m in the second member of Yinggehai Formation. The proven geological reserves of natural gas were nearly 3 billion cubic meters, and the drilling effect was good. The application of rolling exploration research in the deep-water marginal gas field A not only effectively promotes the subsequent rolling exploration activities of the marginal gas field A, but also confirms that rolling exploration is also applicable to deep-water oil and gas exploration. |
| first_indexed | 2024-03-07T16:17:37Z |
| format | Article |
| id | doaj.art-2d973116008e45518d225c8900fc7d3f |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T16:17:37Z |
| publishDate | 2024-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-2d973116008e45518d225c8900fc7d3f2024-03-04T08:32:59ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-01-0146111010.11781/sysydz202401001sysydz-46-1-1Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan BasinKui CHEN0Desheng HU1Ruiyou SONG2Yu GONG3Dazhi XIAO4Anmin HUANG5Yushuang ZHU6Department of Geology, Northwest University/State Key Laboratory of Continental Dynamics, Xi'an, Shaanxi 710069, ChinaZhanjiang Branch of CNOOC Ltd., Zhanjiang, Guangdong 524057, ChinaHainan Branch of CNOOC Ltd., Haikou, Hainan 570300, ChinaHainan Branch of CNOOC Ltd., Haikou, Hainan 570300, ChinaHainan Branch of CNOOC Ltd., Haikou, Hainan 570300, ChinaZhanjiang Branch of CNOOC Ltd., Zhanjiang, Guangdong 524057, ChinaDepartment of Geology, Northwest University/State Key Laboratory of Continental Dynamics, Xi'an, Shaanxi 710069, ChinaA complete technical system of gas field rolling exploration such as target search, evaluation and drilling was introduced to promote the development of the deep-water marginal gas field A in the central canyon of the Qiongdongnan Basin. In addition to the traditional target search technology of oil and gas potential in the zone, a target search technology of evaluation process was proposed for the marginal gas field A. A total of five potential oil and gas blocks were searched, and the structure A4 was selected for oil and gas target evaluation. The main controlling factors of hydrocarbon accumulation in the structure A4 were studied from two aspects: trap interpretation and implementation, and trap hydrocarbon detection. The predicted dominant gas-bearing areas in the central part of structure A4 have favorable gas-bearing information characteristics such as strong amplitude attributes, low density, low velocity, low P-wave impedance, and low P-wave and S-wave velocity ratios. They were generally classified as class Ⅲ AVO anomaly, which can upgrade the HL_0 gas group to control natural gas geological reserves. The rolling exploration well A4-1 was drilled, encountering a gas layer of over 20 m in the Huangliu Formation, and a suspicious gas layer of nearly 10 m in the second member of Yinggehai Formation. The proven geological reserves of natural gas were nearly 3 billion cubic meters, and the drilling effect was good. The application of rolling exploration research in the deep-water marginal gas field A not only effectively promotes the subsequent rolling exploration activities of the marginal gas field A, but also confirms that rolling exploration is also applicable to deep-water oil and gas exploration.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401001rolling exploration of oil and gasmaturing exploratory areadeep-water areacentral canyonqiongdongnan basinnorthern south china sea |
| spellingShingle | Kui CHEN Desheng HU Ruiyou SONG Yu GONG Dazhi XIAO Anmin HUANG Yushuang ZHU Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin Shiyou shiyan dizhi rolling exploration of oil and gas maturing exploratory area deep-water area central canyon qiongdongnan basin northern south china sea |
| title | Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin |
| title_full | Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin |
| title_fullStr | Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin |
| title_full_unstemmed | Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin |
| title_short | Technical system and achievements of rolling exploration in large and medium-sized deep-water gas fields: a case study of marginal gas field A in central canyon of Qiongdongnan Basin |
| title_sort | technical system and achievements of rolling exploration in large and medium sized deep water gas fields a case study of marginal gas field a in central canyon of qiongdongnan basin |
| topic | rolling exploration of oil and gas maturing exploratory area deep-water area central canyon qiongdongnan basin northern south china sea |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202401001 |
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