Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin

ZHANG Zhongpei; ZHANG Yu; ZHANG Mingli; LU Hongmei; ZHANG Rongqiang; CHEN Yuanzhuang; WANG Hanzhou; LI Pengwei

doi:10.11781/sysydz202204559

Volume 44 Issue 4

Jul. 2022

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Article Navigation > PETROLEUM GEOLOGY & EXPERIMENT > 2022 > 44(4): 559-568

ZHANG Zhongpei, ZHANG Yu, ZHANG Mingli, LU Hongmei, ZHANG Rongqiang, CHEN Yuanzhuang, WANG Hanzhou, LI Pengwei. Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2022, 44(4): 559-568. doi: 10.11781/sysydz202204559

Citation:

ZHANG Zhongpei, ZHANG Yu, ZHANG Mingli, LU Hongmei, ZHANG Rongqiang, CHEN Yuanzhuang, WANG Hanzhou, LI Pengwei. Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2022, 44(4): 559-568. doi: 10.11781/sysydz202204559

Citation:

ZHANG Zhongpei, ZHANG Yu, ZHANG Mingli, LU Hongmei, ZHANG Rongqiang, CHEN Yuanzhuang, WANG Hanzhou, LI Pengwei. Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2022, 44(4): 559-568. doi: 10.11781/sysydz202204559

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Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin

doi: 10.11781/sysydz202204559

1.
Petroleum Exploration & Production Research Institute, SINOPEC, Beijing 102206, China
2.
Department of Oilfield Exploration & Development, SINOPEC, Beijing 100728, China

Received Date: 2021-07-19
Rev Recd Date: 2022-05-20
Publish Date: 2022-07-28

Abstract

Abstract

In recent years, significant oil and gas discoveries have been achieved in the Permian Upper Wuerhe Formation and the Triassic Baikouquan Formation on the marginal slope of oil generation sag, Junggar Basin. However, in the central sag of the basin, no oil or gas show has been discovered in target formations, and low production has been made only by two wells. As a result, it is necessary to deepen the understanding of the mechanisms of oil and gas accumulation and clarify the main controlling factors. The analyses of the accumulation conditions in the central sag and some wells show that the direct reason for the failure to find oil and gas in the sag is the lack of local source-connecting faults and poor reservoir properties. An accumulation model with source in the lower section and reservoir in the upper section controlled by both source-connecting faults and favorable sand bodies was established for the Permian and Triassic strata in the sag. The sandbody lithologic reservoirs of fan-delta front subfacies in the Upper Wuerhe and Baikouquan formations under the background of stratigraphic overlap are the primary direction of exploration, covering an area about 3 600 km². The comprehensive exploration of unconventional oil and gas in the Middle-Lower Permian source rocks and conventional oil and gas in multiple layers outside the source area should be targeted.
- source-connecting fault,
- main controlling factors of reservoir forming,
- Permian,
- Triassic,
- central sag area,
- Junggar Basin

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Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin

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Main controlling factors and exploration direction of Permian to Triassic reservior in the central sag of Junggar Basin

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