松辽盆地北部古中央隆起带天然气地球化学特征及成藏条件
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摘要
松辽盆地北部古中央隆起带勘探程度低,天然气成藏条件认识薄弱,但勘探潜力不容忽视,是大庆油田重要的资源接替领域。通过同位素、包裹体等地球化学实验数据分析和地质综合研究,首次开展了古中央隆起带天然气地球化学特征及成藏条件的系统研究。结果表明:研究区不发育烃源岩,气源来源于沙河子组烃源岩;成藏期为烃源岩生排气初期,先充注油藏,然后裂解为气藏。最后进一步指出古中央隆起带基岩为油气优势运聚地区,具备天然气成藏条件,可作为松辽盆地深层天然气下步勘探的重点领域。
The paleo-central uplift belt in northern Songliao Basin has a low degree of exploration and weak understanding of reservoir-forming conditions,but its exploration potential cannot be ignored,and it is an important resource replacement area in the Daqing Oilfield.Based on the analysis of geochemical experimental data such as isotopes and inclusions and comprehensive geological studies,a systematic study on the geochemical characteristics and reservoir forming conditions of natural gas in the paleo-central uplift zone has been carried out for the first time.It revealed that there are no source rocks in the study area,and the gas source comes from the source rocks of Shahezi Formation.It is cleared that the initial stage of hydrocarbon generation and expulsion is the stage of reservoir formation,first filling the oil reservoir and then cracked into gas reservoir.It is pointed out that the bedrock in the paleo-central uplift zone is the predominant area for hydrocarbon migration and accumulation,and possesses the conditions for gas accumulation,which can be used as the key area for next step deep gas exploration in Songliao Basin.
The paleo-central uplift belt in northern Songliao Basin has a low degree of exploration and weak understanding of reservoir-forming conditions,but its exploration potential cannot be ignored,and it is an important resource replacement area in the Daqing Oilfield.Based on the analysis of geochemical experimental data such as isotopes and inclusions and comprehensive geological studies,a systematic study on the geochemical characteristics and reservoir forming conditions of natural gas in the paleo-central uplift zone has been carried out for the first time.It revealed that there are no source rocks in the study area,and the gas source comes from the source rocks of Shahezi Formation.It is cleared that the initial stage of hydrocarbon generation and expulsion is the stage of reservoir formation,first filling the oil reservoir and then cracked into gas reservoir.It is pointed out that the bedrock in the paleo-central uplift zone is the predominant area for hydrocarbon migration and accumulation,and possesses the conditions for gas accumulation,which can be used as the key area for next step deep gas exploration in Songliao Basin.
引文
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[16] Li Jingkun,Wang Qingkao,Zou Yuliang,et al.Basin thermal history buildup by the homogenized temperature and pressure of the inclusions[J].Petroleum Geology&Oilfield Development in Daqing,2015,34(2):13-18.李景坤,王庆考,邹育良,等.应用包裹体均一温度和压力恢复盆地热史[J].大庆石油地质与开发,2015,34(2):13-18.
[17] Liao Lingling,Wang Yunpeng.Retrieving paleo-pressure of the upper paleozoic fluid of the Ordos Basin using inclusion PVTx modeling and PetroMod basin simulation system[J].Bulletin of Mineralogy,Petrology and Geochemistry,2015,34(5):955-959.廖玲玲,王云鹏.利用包裹体PVTx和PetroMod盆地模拟系统反演鄂尔多斯盆地上古生界古流体压力[J].矿物岩石地球化学通报,2015,34(5):955-959.
[18] Yang Shengyu,Zhang Jinchuan,Tang Xuan.Three-dimensional basin modeling study on Zhangjiatan shale gas area in Ordos Basin[J].Natural Gas Geoscience,2016,27(5):932-942.杨升宇,张金川,唐玄.鄂尔多斯盆地张家滩页岩气区三维盆地模拟[J].天然气地球科学,2016,27(5):932-942.
[2] Fu Guang,Zang Fengzhi.Favorable geological conditions of formation of Xushen large gas field[J].Journal of Jilin University:Earth Science Edition,2011,41(1):12-20.付广,臧凤智.徐深大气田形成的有利地质条件[J].吉林大学学报:地球科学版,2011,41(1):12-20.
[3] Wand Min,Sun Yefeng,Wang Wenguang,et al.Gas generation characteristics and resource potential of the deep source rock in Xujiaweizi fault depression,northern Songliao Basin[J].Natural Gas Geoscience,2014,25(7):1011-1018.王民,孙业峰,王文广,等.松辽盆地北部徐家围子断陷深层烃源岩生气特征及天然气资源潜力[J].天然气地球科学,2014,25(7):1011-1018.
[4] Shao Kuizheng,Liang Xiaodong.Gas accumulation periods and models in Xujiaweizi region[J].Petroleum Geology&Oilfield Development in Daqing,2002,21(6):4-5.邵奎政,梁晓东.徐家围子地区天然气成藏期次及其模式[J].大庆石油地质与开发,2002,21(6):4-5.
[5] Liu Chenglin,Jin Hui,Gao Jiayu,et al.Reservoir formation and exploration orientation of deep natural gas in Songliao Basin[J].China Petroleum Exploration,2007,12(4):1-6.刘成林,金惠,高嘉玉,等.松辽盆地深层天然气成藏富集规律和勘探方向[J].中国石油勘探,2007,12(4):1-6.
[6] Tang Meng,Zeng Wenping,Chi Yongjie,et al.GB/T 13610-2014Analysis of Natural Gas By Gas Chromatography[S].PRC National Standard.Beijing:Standard Press of China,2014:1-28.唐蒙,曾文平,迟永杰,等.GB/T 13610-2014天然气的组成分析气相色谱法[S].中华人民共和国国家标准.北京:中国标准出版社,2014:1-28.
[7] Li Zhisheng,Li Xiangchen,Ma Chenghua,et al.SY/T 5238-2008Analysis Method for Carbon and Oxygen Isotope in Organic Matter and Carbonate[S].The Oil and Gas Industry Standard of the People’s Republic of China.Beijing:Petroleum Industry Press,2008:1-8.李志生,李祥臣,马成华,等.SY/T 5238-2008有机物和碳酸盐岩碳、氧同位素分析方法[S].中华人民共和国石油天然气行业标准.北京:石油工业出版社,2008:1-8.
[8] Li Jingkun,Fang Wei,Zeng Huasen,et al.Possible origins for inverse stable carbon isotopes of gaseous alkanes from the Xujiaweizi fault depression[J].Acta Petrolei Sinica,2011,32(1):54-61.李景坤,方伟,曾花森,等.徐家围子断陷烷烃气碳同位素反序机制[J].石油学报,2011,32(1):54-61.
[9] Song Yan,Xu Yongchang.Origin and identification of natural gases[J].Petroleum Exploration and Development,2005,32(4):24-29.宋岩,徐永昌.天然气成因类型及其鉴别[J].石油勘探与开发,2005,32(4):24-29.
[10] Dai Jinxing,Li Jian,Luo Xia,et al.Alkane carbon isotopic composition and gas source in giant gas fields of Ordos Basin[J].Acta Petrolei Sinica,2005,26(2):19-26.戴金星,李剑,罗霞,等.鄂尔多斯盆地大气田的烷轻烃气碳同位素组成特征及其气源对比[J].石油学报,2005,26(2):19-26.
[11] Dai Jinxing.Characteristics of gas hydrocarbon isotopic and identification all kinds of natural gas[J].Natural Gas Geoscience,1993,4(2/3):232-240.戴金星.天然气碳氢同位素特征和各类天然气鉴别[J].天然气地球科学,1993,4(2/3):232-240.
[12] Huang Fei,Xin Mao’an.SY/T 5735-1995Continental HydroCarbon Source Rock Geochemical Evaluation Methods[S].The Oil and Gas Industry Standard of the People’s Republic of China.Beijing:Petroleum Industry Press,1995:1-19.黄飞,辛茂安.SY/T 5735-1995陆相烃源岩地球化学评价方法[S].中华人民共和国石油天然气行业标准.北京:石油工业出版社,1995:1-19.
[13] Zhang Bowei,Zhang Juhe,Fu Guang.Geochemical characteristics of natural gas and the contribution ratio of source rocks in the Yingshan fault depression of the Songliao Basin[J].Natural Gas Geoscience,2016,27(12):2185-2192.张博为,张居和,付广.松辽盆地莺山断陷深层天然气地球化学特征与各套烃源岩定量贡献[J].天然气地球科学,2016,27(12):2185-2192.
[14] Zhang Juhe,Li Jingkun,Yan Yan.Geochemical features of natural gas in deep reservoirs in Well Xushen 1and contribution of various source rocks[J].Oil&Gas Geology,2005,26(4):501-504.张居和,李景坤,闫燕.徐深1井深层天然气地球化学特征与各类气源岩的贡献[J].石油与天然气地质,2005,26(4):501-504.
[15] Yin Wei,Bie Biwen,Liu Guilu.The characteristics of fluid inclusions and its application to identifying oil accumulating stages in central depression,Junggar Basin[J].Bulletin of Mineralogy,Petrology and Geochemistry,2009,34(5):53-60.尹伟,别毕文,刘桂禄.准噶尔盆地中央坳陷带包裹体特征及成藏期次分析[J].矿物岩石地球化学通报,2009,34(5):53-60.
[16] Li Jingkun,Wang Qingkao,Zou Yuliang,et al.Basin thermal history buildup by the homogenized temperature and pressure of the inclusions[J].Petroleum Geology&Oilfield Development in Daqing,2015,34(2):13-18.李景坤,王庆考,邹育良,等.应用包裹体均一温度和压力恢复盆地热史[J].大庆石油地质与开发,2015,34(2):13-18.
[17] Liao Lingling,Wang Yunpeng.Retrieving paleo-pressure of the upper paleozoic fluid of the Ordos Basin using inclusion PVTx modeling and PetroMod basin simulation system[J].Bulletin of Mineralogy,Petrology and Geochemistry,2015,34(5):955-959.廖玲玲,王云鹏.利用包裹体PVTx和PetroMod盆地模拟系统反演鄂尔多斯盆地上古生界古流体压力[J].矿物岩石地球化学通报,2015,34(5):955-959.
[18] Yang Shengyu,Zhang Jinchuan,Tang Xuan.Three-dimensional basin modeling study on Zhangjiatan shale gas area in Ordos Basin[J].Natural Gas Geoscience,2016,27(5):932-942.杨升宇,张金川,唐玄.鄂尔多斯盆地张家滩页岩气区三维盆地模拟[J].天然气地球科学,2016,27(5):932-942.