莺歌海-琼东南盆地天然气勘探新认识与新进展
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摘要
南海莺歌海-琼东南盆地(莺-琼盆地)历经几十年勘探取得了良好的天然气发现,但气田主要集中在莺歌海盆地东方区和琼东南盆地深水区中央峡谷西区。从莺-琼盆地基础石油地质条件出发,通过分析莺歌海盆地乐东区构造事件与沉积、成藏之间的耦合关系及琼东南盆地深水区中央峡谷水道储层发育、油气运移成藏模式,提出了乐东区斜坡近洼带具有探明千亿立方米天然气的资源基础和中央峡谷水道东区是拓展勘探重要领域的新认识。在此新的地质认识指导下,新钻井获得重大发现,新增天然气地质储量约600×108 m3,深水东区测试获得日产约百万立方米的高产,从而揭开了莺-琼盆地高温高压和深水天然气勘探的新篇章。
Considerable natural gas discoveries have been achieved in recent decades in Yinggehai-Qiongdongnan basin(Ying-Qiong basin)of the South China Sea,but these discoveries mainly concentrate in Dongfang area of Yinggehai basin and western Central Canyon area of deep water area in Qiongdongnan basin.Based on the understandings of petroleum geological conditions of the study area,through analysis of the coupling relationship of tectonic events with deposition process and hydrocarbon accumulation in Ledong area of Yinggehai basin,and the reservoir development,hydrocarbon migration and accumulation models of central canyon in deep water area of Qiongdongnan basin,two new understandings are proposed as:there is the resource base of 1×10~(11) m~3 of proved natural gas reserves in near-sag area of Ledong slope area and eastern Central Canyon area is the key area for extended exploration.With the guidance of new understandings,new drillings discover 6×10~(10) m~3 natural gas in the study area,and test production of 1×10~6 m~3/d is obtained in eastern deep water area.The discoveries unravel a new chapter for natural gas exploration in high temperature and high pressure area and deep water area of Yinggehai-Qiongdongnan basin.
Considerable natural gas discoveries have been achieved in recent decades in Yinggehai-Qiongdongnan basin(Ying-Qiong basin)of the South China Sea,but these discoveries mainly concentrate in Dongfang area of Yinggehai basin and western Central Canyon area of deep water area in Qiongdongnan basin.Based on the understandings of petroleum geological conditions of the study area,through analysis of the coupling relationship of tectonic events with deposition process and hydrocarbon accumulation in Ledong area of Yinggehai basin,and the reservoir development,hydrocarbon migration and accumulation models of central canyon in deep water area of Qiongdongnan basin,two new understandings are proposed as:there is the resource base of 1×10~(11) m~3 of proved natural gas reserves in near-sag area of Ledong slope area and eastern Central Canyon area is the key area for extended exploration.With the guidance of new understandings,new drillings discover 6×10~(10) m~3 natural gas in the study area,and test production of 1×10~6 m~3/d is obtained in eastern deep water area.The discoveries unravel a new chapter for natural gas exploration in high temperature and high pressure area and deep water area of Yinggehai-Qiongdongnan basin.
引文
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[2]董伟良.南海西部莺-琼盆地天然气勘探领域分析[J].天然气工业,1999,19(1):7-11.DONG weiliang.An analysis of the natural gas exploration areas in Ying-Qiong Basin in western South China Sea[J].Natural Gas Industry,1999,19(1):7-11.
[3]雷超,任建业,李绪深,等.琼东南盆地深水区结构构造特征与油气勘探潜力[J].石油勘探与开发,2011,38(5):560-569.LEI Chao,REN Jianye,LI Xushen,et al.Structural characteristics and petroleum exploration potential in the deep-water area of the Qiongdongnan Basin,South China Sea[J].Petroleum Exploration and Development,2011,38(5):560-569.
[4]XIE Xinong,MULLER R D,LI Sitian,et al.Origin of anomalous subsidence along the Northern South China Sea margin and its relationship to dynamic topography[J].Marine and Petroleum Geology,2006,23:745-765.
[5]CHEN P H,CHEN Z Y,ZHANG Q M.Sequence stratigraphy and continental-margin development of the northwestern shelf of the South China Sea[J].AAPG Bulletin,1993,77(5):842-862.
[6]张启明.莺-琼盆地的演化与构造-热体制[J].天然气工业,1999,19(1):12-17.ZHANG Qiming.Evolution of Ying-Qiong Basin and its tectonic-thermal system[J].Natural Gas Industry,1999,19(1):12-17.
[7]GONG Chenglin,WANG Yingmin,ZHU Weilin,et al.The Central Submarine Canyon in the Qiongdongnan Basin,northwestern South China Sea:Architecture,sequence stratigraphy,and deposition processes[J].Marine and Petroleum Geology,2011,28:1690-1702.
[8]谢玉洪,王振峰,解习农,等.莺歌海盆地坡折带特征及其对沉积体系的控制[J].地球科学——中国地质大学学报,2004,29(5):569-573.XIE Yuhong,WANG Zhenfeng,XIE Xinong,et al.Patterns of slope-break zone and their depositional models in the Yinggehai Basin[J].Earth Science—Journal of University of Geosciences,2004,29(5):569-573.
[9]钟泽红,张迎朝,何小胡,等.莺歌海盆地东方区黄流组层序叠加样式与海底扇内部构型[J].海洋地质与第四纪地质,2015,35(2):91-99.ZHONG Zehong,ZHANG Yingzhao,HE Xiaohu,et al.The sequence of stratigraphy of Huangliu Formation and the internal structures of submarine fan in Dongfang area,Yinggehai Basin[J].Marine Geology and Quaternary Geology,2015,35(2):91-99.
[10]钟泽红,刘景环,张道军,等.莺歌海盆地东方区大型海底扇成因及沉积储层特征[J].石油学报,2013,34(增刊2):102-111.ZHONG Zehong,LIU Jinghuan,ZHANG Daojun,et al.Origin and sedimentary reservoir characteristics of a large submarine fan in Dongfang area,Yinggehai Basin[J].Acta Petrolei Sinica,2013,34(S2):102-111.
[11]张建新,党亚云,何小胡,等.莺歌海盆地乐东区峡谷水道成因及沉积特征[J].海洋地质与第四纪地质,2015,35(5):29-36.ZHANG Jianxin,DANG Yayun,HE Xiaohu,et al.Origin and sedimentary characteristics of canyon channels in Ledong area of Yinggehai Basin[J].Marine Geology and Quaternary Geology,2015,35(5):29-36.
[12]李冬,徐强,王永凤,等.南海晚中新世—上新世红河沉积体系研究[J].沉积学报,2013,31(1):32-36.LI Dong,XU Qiang,WANG Yongfeng,et al.Research on Red River sedimentary system of Late Miocene-Early Pliocene,South China Sea[J].Acta Sedimentologica Sinica,2013,31(1):32-36.
[13]王华,陈思,甘华军,等.浅海背景下大型浊积扇研究进展及堆积机制探讨:以莺歌海盆地黄流组重力流为例[J].地学前缘,2015,22(1):21-34.WANG Hua,CHEN Si,GAN Huajun,et al.Accumulation mechanism of large shallow marine turbidite deposits:a case study of gravity flow deposits of the Huangliu Formation in Yinggehai Basin[J].Earth Science Frontiers,2015,22(1):21-34.
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[20]王振峰,裴健翔,郝德峰,等.莺-琼盆地中新统大型重力流储集体发育条件、沉积特征及天然气勘探有利方向[J].中国海上油气,2015,27(4):13-21.DOI:10.11935/j.issn.1673-1506.2015.04.002.WANG Zhenfeng,PEI Jianxiang,HAO Defeng,et al.Development conditions,sedimentary characteristics of Miocene large gravity flow reservoirs and the favorable gas exploration directions in Ying-Qiong basin[J].China Offshore Oil and Gas,2015,27(4):13-21.DOI:10.11935/j.issn.1673-1506.2015.04.002.
[21]姚哲,朱继田,左倩媚,等.琼东南盆地深水区重力流沉积体系及油气勘探前景[J].天然气工业,2015,35(10):21-30.YAO Zhe,ZHU Jitian,ZUO Qianmei,et al.Gravity flow sedimentary system and petroleum exploration prospect of deep water area in the Qiongdongnan Basin,South China Sea[J].Natural Gas Industry,2015,35(10):21-30.
[22]王振峰,孙志鹏,朱继田,等.南海西部深水区天然气地质与大气田重大发现[J].天然气工业,2015,35(10):11-20.WANG Zhenfeng,SUN Zhipeng,ZHU Jitian,et al.Natural gas geological characteristics and great discovery of large gas fields in deep water area of the western South China Sea[J].Natural Gas Industry,2015,35(10):11-20.
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