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.
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.
[1] 蔡希源. 2011. 川东北元坝地区长兴组大型生物礁滩体岩性气藏储集层精细刻画技术及勘探实效分析. 中国工程科学, 13(10): 28-33. [Cai X Y.2011. The subtly method of reservoir and exploration effects on the organic reef-beach body of Changxing Formation,Yuanba Area,Northeastern Sichuan. Engineering Sciences, 13(10): 28-33] [2] 曹清古,刘光祥,张长江,潘文蕾. 2013. 四川盆地晚二叠世龙潭期沉积环境及其源控作用分析. 石油实验地质, 35(1): 36-41. [Cao Q G,Liu G X,Zhang C J,Pan W L.2013. Sedimentary environment and its controlling on source rocks during late Permian in Sichuan Basin. Petroleum Geology & Experiment, 35(1): 36-41] [3] 陈祖庆,屈大鹏,缪志伟. 2015. 元坝地区长兴组超深层礁滩储集层地震预测. 中国西部科技, 14(7): 20-26. [Chen Z Q,Qu D P,Miao Z W.2015. Seismic prediction of deep reef-bank reservoirs in the Changxing Formation in the YB area. Science and Technology of West China, 14(7): 20-26] [4] 段金宝,彭劲. 2014. 四川盆地东北部元坝地区下三叠统飞仙关组层序—沉积相特征. 海相油气地质, 19(2): 47-53. [Duan J B,Peng J.2014. Lower Triassic Feixianguan stratigraphical sequences and sedimentary facies characteristics in Yuanba area in the northeast of Sichuan Basin. Marine Origin Petroleum Geology, 19(2): 47-53] [5] 段金宝,黄仁春,程胜辉,曾韬,朱祥. 2008. 川东北元坝地区长兴期—飞仙关期碳酸盐岩台地沉积体系及演化. 成都理工大学学报(自然科学版), 35(6): 663-668. [Duan J B,Huang R C,Cheng S H,Zeng T,Zhu X.2008. Depositional system and the evolution of carbonate rock platform of Changxing-Feixianguan period in Yuanba area of Northeast Sichuan,China. Journal of Chengdu University of Technology(Science & Technology Edition), 35(6): 663-668] [6] 范小军. 2012. 川东北元坝地区长兴组与飞仙关组天然气成藏差异性成因. 天然气工业, 32(6): 15-20. [Fan X J.2012. Causes of differences of natural gas pooling between Changxing Formation and the Feixianguan Formation in Yuanba,Sichuan Basin. Natural Gas Industry, 32(6): 15-20] [7] 范小军,黄勇,厚东琳,邓金花. 2011. 储集层物性与产能的关系: 以元坝长兴组礁滩相储集层为例. 天然气技术与经济, 5(4): 29-32. [Fan X J,Huang Y,Hou D L,Deng J H.2011. Relationship between physical property and deliverability: An example from Changxing bioreef-shoal reservoir of Yuanba area. Natural Gas Technology and Economy, 5(4): 29-32] [8] 郭彤楼. 2011a. 川东北元坝地区长兴组—飞仙关组台地边缘层序地层及其对储集层的控制. 石油学报, 32(3): 387-394. [Guo T L.2011. Sequence strata of the platform edge in the Changxing and Feixianguan Formations in the Yuanba area,northeastern Sichuan Basin and their control on reservoirs. Acta Petrolei Sinica, 32(3): 387-394] [9] 郭彤楼. 2011b. 元坝深层礁滩气田基本特征与成藏主控因素. 天然气工业, 31(10): 12-16. [Guo T L.2011. Basic characteristics of deep reef-bank reservoirs and major controlling factors of gas pools in the Yuanba Gas Field. Natural Gas Industry, 31(10): 12-16] [10] 郭彤楼. 2011c. 元坝气田长兴组储集层特征与形成主控因素研究. 岩石学报, 27(8): 2381-2391. [Guo T L.2011. Reservoir characteristics and its controlling factors of the Changxing Formation reservoir in the Yuanba gas field,Sichuan basin,China. Acta Petrologica Sinica, 27(8): 2381-2391] [11] 黄勇,张汉荣,范小军. 2013. 元坝地区长兴组生物孔隙特征及控制因素. 西南石油大学学报(自然科学版), 35(1): 79-85. [Huang Y,Zhang H R,Fan X J.2013. The controlling factors and character for biological pores of Changxing Formation in Yuanba area in Sichuan Basin. Journal of Southwest Petroleum University(Science &Technology Edition), 35(1): 79-85] [12] 李宏涛,肖开华,龙胜祥,游瑜春,刘国萍,李秀鹏. 2016. 四川盆地元坝地区长兴组生物礁储集层形成控制因素与发育模式. 石油与天然气地质, 37(5): 744-756. [Li H T,Xiao K H,Long S X,You Y C,Liu G P,Li X P.2016. Controlling factors and development models of biohermal reservoirs of the Changxing Formation in Yuanba area,Sichuan Basin. Oil & Gas Geology, 37(5): 744-756] [13] 马永生,牟传龙,郭彤楼,谭钦银,余谦. 2005. 四川盆地东北部长兴组层序地层与储集层分布. 地学前缘, 12(3): 179-185. [Ma Y S,Mou C L,Guo T L,Tan Q Y, Yu Q.2005. Sequence stratigraphy and reservoir distribution of Feixianguan Formation in Northeastern Sichuan. Earth Science Frontiers, 12(3): 179-185] [14] 蒲勇. 2011. 元坝地区深层礁滩储集层多尺度地震识别技术. 天然气工业, 31(10): 27-31. [Pu Y.2011. Multi-scale seismic identification of deep reef-bank reservoirs in the Yuanba area. Natural Gas Industry, 31(10): 27-31] [15] 尹正武,凡睿,陈祖庆,段金宝,邓萍. 2012. 生物礁滩岩性气藏含气面积的圈定方法: 以元坝气田长兴组气藏为例. 石油实验地质, 34(5): 499-505. [Yin Z W,Fan R,Chen Z Q,Duan J B,Deng P.2012. Delineation of gas-bearing area of lithologic gas reservoir in organic beach reef: A case study in Changxing Formation,Yuanba Gas field. Petroleum Geology & Experiment, 34(5): 499-505] [16] Long S X,Huang R C,Li H T,You Y C,Liu G P,Bai Z R.2011. Formation mechanism of the Changxing Formation gas reservoir in the Yuanba Gas Field,Sichuan Basin,China. Acta Geologica Sinica(English Edition), 85(1): 233-242. [17] Vail P R.1987. Seismic stratigraphy interpretation using sequence stratigraghy,part 1: seismic stratigraghy interpretation procedure.AAPG Studies in Geology, 27: 1-10. [18] Vail P R,Mithum R M,Thompson S.1977. Global cycles of relative changes of sea level. AAPG Memoir 26,99-116.
