Reservoir characteristics and hydrocarbon accumulation significance of metamorphic zones of intrusive rocks and surrounding rocks in second member of Paleocene Funing Formation in Qintong Sag, Subei Basin

• Published in: Shi you shi yan di zhi Vol. 46; no. 2; pp. 238 - 246
• Main Author: Suhua ZANG
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Petroleum Geology and Experiment 01.03.2024
• Subjects: metamorphic zone of surrounding rock; paleocene; qintong sag; reservoir characteristic; second member of funing formation; subei basin
• ISSN: 1001-6112
• DOI: 10.11781/sysydz202402238

Volcanic reservoirs play a crucial role in oil and gas exploration. The intrusive rocks in the Qintong Sag of the Subei Basin are widely distributed within active oil and gas deposits, making them a significant area for further exploration and reserve expansion in East China's continental basins. Despite the promising exploration prospects, there is a research gap regarding the impact of volcanics on shale surrounding rock reservoirs and their accumulation potential. It is essential to evaluate whether the shale metamorphic zones could serve as a key exploration target. This study focuses on the metamorphic zones of intrusive rocks and surrounding rocks in the Qintong Sag's second member of the Funing Formation. By integrating core, thin section, whole rock, and well logging data, this work systematically reveals the reservoir characteristics of the mud shale metamorphic zones and defines the contribution of magma intrusion to hydrocarbon accumulation in the metamorphic zones. The results indicate that magma