Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin

WU Jun; CHEN Kongquan; ZHANG Feng; SHEN Junjun; LIU Jinshuai; TAN Jing

doi:10.11781/sysydz201803323

Volume 40 Issue 3

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WU Jun, CHEN Kongquan, ZHANG Feng, SHEN Junjun, LIU Jinshuai, TAN Jing. Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(3): 323-329. doi: 10.11781/sysydz201803323

Citation:

WU Jun, CHEN Kongquan, ZHANG Feng, SHEN Junjun, LIU Jinshuai, TAN Jing. Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(3): 323-329. doi: 10.11781/sysydz201803323

Citation:

WU Jun, CHEN Kongquan, ZHANG Feng, SHEN Junjun, LIU Jinshuai, TAN Jing. Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2018, 40(3): 323-329. doi: 10.11781/sysydz201803323

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Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin

doi: 10.11781/sysydz201803323

1.
Hubei Collaborative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, Hubei 430100, China
2. SINOPEC East China Company, Nanjing, Jiangsu 210019, China

Received Date: 2017-01-01
Rev Recd Date: 2018-04-19
Publish Date: 2018-05-28

Abstract

Abstract

Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks are of a great significance for the exploration and development of magmatic oil reservoirs. The contact metamorphic zone of hypabyssal intrusive rocks was well preserved in the Shuaiduo-Maoshan areas of the Qintong Sag, Northern Jiangsu Basin, and is an ideal area to understand this mechanism. Systematic core and drill cuttings observations, well logging interpretation and borehole-seism-modulus integration techniques were conducted to evaluate spatial distribution regularities and dissect the characteristics of reservoir development in a typical contact metamorphic zone. Some favorable reservoirs in the contact metamorphic zone of intrusive rocks in the Qingtong Sag were predicted. The studies showed that wall rocks were altered by the influence of intrusive rocks, forming the contact metamorphic zone of intrusive rocks. The contact metamorphic zone has the characteristics of high natural gamma, medium sonic time difference, medium natural potential and high resistivity on logging curves. The contact metamorphic zone generally distributed above and below the intrusive rocks, and has a positive correlation with the thickness of intrusive rocks. In addition, the thickness of altered mudstones in the contact metamorphic zone is the main factor affecting the distribution of high quality reservoirs, and the high-quality reservoirs in the contact metamorphic zone near to volcanic sills are favorable for hydrocarbon accumulation.
- fissure,
- alteration thickness,
- intrusive rock,
- favorable zone prediction,
- Qintong Sag,
- Northern Jiangsu Basin

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References(23)

References

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Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin

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Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag, Northern Jiangsu Basin

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