柴北缘鄂博梁构造带油气成藏条件及勘探部署
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摘要
柴达木盆地北缘鄂博梁构造带由鄂博梁Ⅰ号、鄂博梁Ⅱ号、鄂博梁Ⅲ号和葫芦山4个地面构造组成。近期的综合研究和老井复查表明:该区带具有优越的天然气成藏条件:位于侏罗系生气凹陷之内、发育大型构造圈闭、具有优质储层和良好储盖组合以及深大断裂沟通气源,发育源内和源上两种成藏模式。近期,邻近的牛东构造获得重大突破,其他构造已钻井都有气显示,并且鄂7井获得工业气流。在成藏条件和目前勘探现状综合分析的基础上,提出该区优先风险钻探鄂博梁Ⅰ号构造;积极准备其他构造,其中以开展精细地震勘探鄂博梁Ⅲ号构造为重点,精细落实圈闭后投入勘探。
Eboliang structural belt on the northern periphery of Qaidam Basin is composed of four surface structures – Eboliang No.Ⅰ, Eboliang No. Ⅱ, Eboliang No. Ⅲ and Hulushan. The latest study and re-investigation of old wells indicate that this belt has good conditions for natural gas accumulations, because it is located in the Jurassic gas sourcing depression with development of large-scale structural traps, high-quality reservoir-cap assemblages and the deep and large faults that connect gas sources. There are two patterns for gas accumulations – within the source and above the source. Significant breakthroughs have been made in the nearby Niudong structure in recent time. Gas show was found in drilling of other structures. In addition, E-7 Well obtained an industrial gas flow. Based the accumulation conditions and analysis of the current exploration conditions, this paper proposes to drill exploration wells first in Eboliang No.Ⅰ structure in this belt while making active preparations for other structures. Meanwhile, the detailed seismic exploration efforts should be focused on Eboliang No. Ⅲ structure to locate the trap for exploration.
Eboliang structural belt on the northern periphery of Qaidam Basin is composed of four surface structures – Eboliang No.Ⅰ, Eboliang No. Ⅱ, Eboliang No. Ⅲ and Hulushan. The latest study and re-investigation of old wells indicate that this belt has good conditions for natural gas accumulations, because it is located in the Jurassic gas sourcing depression with development of large-scale structural traps, high-quality reservoir-cap assemblages and the deep and large faults that connect gas sources. There are two patterns for gas accumulations – within the source and above the source. Significant breakthroughs have been made in the nearby Niudong structure in recent time. Gas show was found in drilling of other structures. In addition, E-7 Well obtained an industrial gas flow. Based the accumulation conditions and analysis of the current exploration conditions, this paper proposes to drill exploration wells first in Eboliang No.Ⅰ structure in this belt while making active preparations for other structures. Meanwhile, the detailed seismic exploration efforts should be focused on Eboliang No. Ⅲ structure to locate the trap for exploration.
引文
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[16]王九拴,胡杰,刘志强,等.柴达木三湖地区转换波地震资料处理解释技术应用[J].中国石油勘探,2011,16(5-6):157-163.Wang Jiushuan,Hu Jie,Liu Zhiqiang,et al.Application of converted-wave seismic data processing and interpreting technique in Sanhu Area,Qaidam Basin[J].China Petroleum Exploration,2011,16(5-6):157-163.
[17]颉永琛,关平,杨国军,等.南八仙油气田成藏机理再认识[J].天然气地球科学,2012,23(5):876-883.Xie Yongchen,Guan Ping,Yang Guojun,et al.Reanalysis of reservoir accumulation mechanism in Nanbaxian oil-gas field[J].Natural Gas Geoscience,2012,23(5):876-883.
[18]齐小平,张友焱,杨辉,等.柴达木盆地三湖地区天然气有利勘探区带(目标)遥感物化探综合分析与评价[J].中国石油勘探,2012,17(5):17-26.Qi Xiaoping,Zhang Youyan,Yang Hui,et al.Analysis and evaluation of beneficial gas exploration zone based on remote sensing geophysical and geochemical methods in Sanhu Area of Qaidam Basin[J].China Petroleum Exploration,2012,17(5):17-26.
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[20]崔俊,郑永仙,陈登钱,等.柴达木盆地昆北断阶带底砾岩储层特征研究[J].中国石油勘探,2013,18(3):26-33.Cui Jun,Zheng Yongxian,Chen Dengqian,et al.Study on characteristics of basal conglomerate reservoir in North-Kunlun faults zone,Qaidam Basin[J].China Petroleum Exploration,2013,18(3):26-33.
[21]沈平,徐永昌,王先彬.气源岩和天然气地球化学特征及成气机理研究[M].兰州:甘肃科学技术出版社,1991:1-248。Shen Ping,Xu Yongchang,Wang Xianbin.Gas source rocks,gas geochemical characteristics and the mechanism of gas generation[M].Lanzhou:Gansu Science and Technology Press,1991:1-248.
[2]肖安成,陈志勇,杨树锋,等.柴达木盆地北缘晚白垩世古构造活动的特征研究[J].地学前缘,2005,12(4):451-457.Xiao Ancheng,Chen Zhiyong,Yang Shufeng,et al.The study of Late Cretaceous paleostructural characteristics in northern Qaidam Basin[J].Earth Science Frontiers,2005,12(4):451-457.
[3]禚喜准,王琪,郝乐伟,等.柴北缘中部下干柴沟组下段成岩演化与储层评价[J].兰州大学学报:自然科学版,2009,45(4):23-20.Zhuo Xizhun,Wang Qi,Hao Lewei,et al.Diagenetic evolution and reservoir assessment about the lower part of Xiaganchaigou formation in the central areas of northern Qaidam Basin[J].Journal of Lanzhou University:Natural Sciences,2009,45(4):23-20.
[4]陈吉,谢梅,史基安,等.柴北缘马北地区下干柴沟组储层特征[J].天然气地球科学,2011,(5):821-826.Chen Ji,Xie Mei,Shi Ji’an,et al.Reservoir characteristics of Xiaganchaigou formation in mabei area of northern Qaidam Basin[J].Natural Gas Geoscience,2011,(5):821-826.
[5]王兆明,罗晓容,汪立群,等.柴达木盆地北缘西段不整合发育特征及其油气地质意义[J].中国石油勘探,2010,15(4):19-25Wang Zhaoming,Luo Xiaorong,Wang Liqun,et al.Unconformity characteristics of West segment of Northern margin in Qaidam Basin and its significance in petroleum exploration[J].China Petroleum Exploration,2010,15(4):19-25.
[6]尹成明,江波,韩秦鹏,等.柴达木盆地石油勘探潜力及勘探方向[J].中国石油勘探,2006,11(6):38-41.Yin Chengming,Jiang Bo,Han Qinpeng,et al.Potential and direction of petroleum exploration in Qaidam Basin[J].China Petroleum Exploration,2006,11(6):38-41.
[7]黄立功,党玉琪,徐凤银,等.柴达木盆地油气勘探现状和突破方向[J].中国石油勘探,2006,11(6):1-8.Huang Ligong,Dang Yuqi,Xu Fengyin,et al.Present situation and break through direction of oil and gas exploration in Qaidam Basin[J].China Petroleum Exploration,2006,11(6):1-8.
[8]范文科,张福东,王宗礼,等.中国石油“十一五”天然气勘探新进展与未来大气田勘探新领域分析[J].中国石油勘探,2012,17(1):8-13.Fan Wenke,Zhang Fudong,Wang Zongli,et al.New progress in natural gas exploration during“11th Five-Year Plan”period and analysis on PetroChina’s new domains of large gas field exploration in future[J].China Petroleum Exploration,2012,17(1):8-13.
[9]谭彦虎,彭德华,潘洪峰,等.柴达木盆地天然气资源潜力及勘探方向[J].中国石油勘探,2006,11(6):42-44.Tan Yanhu,Peng Dehua,Pan Hongfeng,et al.Potential of natural gas resource and its exploration direction in Qaidam Basin[J].China Petroleum Exploration,2006,11(6):42-44.
[10]田光荣,阎存凤,妥进才,等.柴达木盆地柴北缘煤成气晚期成藏特征[J].天然气地球科学,2011,22(6):1028-1032.Tian Guangrong,Yan Cunfeng,Tuo Jincai,et al.Late hydrocarbon accumulation characteristic of coal related gas in northern Qaidam Basin[J].Natural Gas Geoscience,2011,22(6):1028-1032.
[11]陈吉,史基安,孙国强,等.鄂博梁Ⅲ号构造上、下油砂山组成岩作用及对孔隙影响[J].兰州大学学报:自然科学版,2012,129(6):1-7.Chen Ji,Shi Ji’an,Sun guoqiang,et al.Diagenesis of lower-upper You Shashan formation and its impact on porosity in No.Ⅲstructure of Eboliang Area[J].Journal of Lanzhou University:Natural Sciences,2012,129(6):1-7.
[12]付锁堂,汪立群,徐子远,等.柴北缘深层气藏形成的地质条件及有利勘探区带[J].天然气地球科学,2009,20(6):841-846.Fu Suotang,Wang Liqun,Xu Ziyuan,et al.Geological conditions of deep gas pools and their favorable prospects[J].Natural Gas Geoscience,2009,20(6):841-846.
[13]付锁堂,徐礼贵,巩庆林,等.柴西南区石油地质特征及再勘探再研究的建议[J].中国石油勘探,2010,15(1):6-10.Fu Suotang,Xu Ligui,Gong Qinglin,et al.Petroleum geologic characteristics of Southwestern Qaidam Basin and recommendations for futher exploration and study[J].China Petroleum Exploration,20010,15(1):6-10.
[14]彭立才,朱思俊,王卫星,等.柴达木盆地北缘马北Ⅰ号圈闭油气成藏机理与模式[J].新疆石油地质,2006,27(6):673-677.Peng Licai,Zhu Sijun,Wang Weixing,et al.Mechanism and model of hydrocarbon accumulation in Mabei-I trap in northern margin of Qaidam Basin[J].Xin Jiang Petroleum Geology,2006,27(6):673-677.
[15]孙平,郭泽清,张林,等.柴达木盆地三湖北斜坡岩性气藏勘探与发现[J].中国石油勘探,2011,16(1):25-31.Sun Ping,Guo Zeqing,Zhang Lin,et al.Lithologic gas reservoir exploration and discovery in Northern Sanhu Slope,Qaidam Basin[J].China Petroleum Exploration,2011,16(1):25-31.
[16]王九拴,胡杰,刘志强,等.柴达木三湖地区转换波地震资料处理解释技术应用[J].中国石油勘探,2011,16(5-6):157-163.Wang Jiushuan,Hu Jie,Liu Zhiqiang,et al.Application of converted-wave seismic data processing and interpreting technique in Sanhu Area,Qaidam Basin[J].China Petroleum Exploration,2011,16(5-6):157-163.
[17]颉永琛,关平,杨国军,等.南八仙油气田成藏机理再认识[J].天然气地球科学,2012,23(5):876-883.Xie Yongchen,Guan Ping,Yang Guojun,et al.Reanalysis of reservoir accumulation mechanism in Nanbaxian oil-gas field[J].Natural Gas Geoscience,2012,23(5):876-883.
[18]齐小平,张友焱,杨辉,等.柴达木盆地三湖地区天然气有利勘探区带(目标)遥感物化探综合分析与评价[J].中国石油勘探,2012,17(5):17-26.Qi Xiaoping,Zhang Youyan,Yang Hui,et al.Analysis and evaluation of beneficial gas exploration zone based on remote sensing geophysical and geochemical methods in Sanhu Area of Qaidam Basin[J].China Petroleum Exploration,2012,17(5):17-26.
[19]崔俊,周莉,张小波,等.柴达木盆地乌南油田致密砂岩储层特征[J].中国石油勘探,2013,18(1):22-28.Cui Jun,Zhou Li,Zhang Xiaobo,et al.Characteristics of compact rock reservoir of Wunan Oil Field in Qaidam Basin[J].China Petroleum Exploration,2013,18(1):22-28.
[20]崔俊,郑永仙,陈登钱,等.柴达木盆地昆北断阶带底砾岩储层特征研究[J].中国石油勘探,2013,18(3):26-33.Cui Jun,Zheng Yongxian,Chen Dengqian,et al.Study on characteristics of basal conglomerate reservoir in North-Kunlun faults zone,Qaidam Basin[J].China Petroleum Exploration,2013,18(3):26-33.
[21]沈平,徐永昌,王先彬.气源岩和天然气地球化学特征及成气机理研究[M].兰州:甘肃科学技术出版社,1991:1-248。Shen Ping,Xu Yongchang,Wang Xianbin.Gas source rocks,gas geochemical characteristics and the mechanism of gas generation[M].Lanzhou:Gansu Science and Technology Press,1991:1-248.