Establishment of high-precision sequence stratigraphic framework of the Changxing-Feixianguan Formations and prediction of reef-shoal reservoirs in Yuanba area, Sichuan Basin
Huang Ren-Chun1, Xing Feng-Cun2,3, Fan Xiao-Jun1, Zou Yu-Tao1
1 SINOPEC Exploration Company, Chengdu 610041,China; 2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Chengdu University of Technology), Chengdu 610059, China; 3 Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Abstract To clarify the development characteristics of sedimentary facies and reservoir of ultra-deep large reef-shoal marine gas field of the Upper Permian Changxing-Lower Triassic Feixianguan Formation in Yuanba area of Sichuan Basin,high-precision isochronous sequence stratigraphic framework was established by well-seismic crossfeed mode,and it revealed that the sedimentary facies belt distribution and reservoir development obviously have close relation with the sequence stratigraphic framework. Then,extraction of the sensitive attributes,inversion and the correspondence analysis of sedimentary facies of the platform margin reef-shoal was carried out, and the growth characteristics of reef-shoal were described systematically. The drilling verification analysis reveals that the coincidence degree of the prediction of reef-shoal reservoir development characteristics based on the high precision sequence stratigraphic framework and the drilling results is high. It effectively explained why the gas prodction of the wells developed in reef-shoal facies belt is higher than one million cubic meters. The study further defined and characterized the plane characteristics of shelf,platform margin slope,platform margin,open platform,restricted platform facies and subfacies including bioclastic banks,platform margin reef bank,platform margin reef,oolitic bank and interbank sea in Yuanba area. It will estabish a good foundation for the integration of the exploration and development of Yuanba region.
Fund:Co-funded by the National Science and Technology Major Project of China(No.2011ZX05005-003)and the Youth Project of the National Natural Science Foundation of China(No.41302089)
About author: Huang Ren-Chun,born in 1968,professor senior engineer. He is engaged in researches on hydrocarbon geology and exploration deployment. E-mail: huangrc.ktnf@sinopec.com.
Cite this article:
Huang Ren-Chun,Xing Feng-Cun,Fan Xiao-Jun et al. Establishment of high-precision sequence stratigraphic framework of the Changxing-Feixianguan Formations and prediction of reef-shoal reservoirs in Yuanba area, Sichuan Basin[J]. JOPC, 2019, 21(2): 369-378.
Huang Ren-Chun,Xing Feng-Cun,Fan Xiao-Jun et al. Establishment of high-precision sequence stratigraphic framework of the Changxing-Feixianguan Formations and prediction of reef-shoal reservoirs in Yuanba area, Sichuan Basin[J]. JOPC, 2019, 21(2): 369-378.
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