四川盆地中台山地区须家河组致密砂岩气藏富集高产主控因素
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摘要
四川盆地须家河组具有典型的致密砂岩气特征。2006年以来四川盆地大川中地区须家河组致密砂岩先后发现安岳须二段气藏、合川须二段气藏等多个大型岩性气藏,累计提交三级地质储量万亿立方米,勘探成果显著,但气藏投入开发后普遍产水,且水产量较高,累计产气量超过5 000×104 m3的高产井较少。2012年,在川中—川西过渡带中台山地区钻探了风险探井ZT1井,在须家河组须二段获高产工业气流。投产后该井日产气量高、产微量水,目前已累计产天然气超1×108 m3。在区域地质研究基础上,通过大量生产井地质条件分析,开展了中台山地区与川中其他地区须二段气藏高产因素差异性分析,明确了优质烃源岩、优质河道砂岩储层、天然裂缝是中台山地区油气富集高产的主控因素,优质烃源岩发育为致密砂岩提供充足气源;优质河道砂岩储层形成高丰度气藏;天然裂缝是油气高产的关键。
The Xujiahe Formation in Sichuan Basin has typical characteristics of tight sandstone gas.The exploration of the Xujiahe tight gas reservoir has obtained good achievements since 2006,which has found Anyue and Hechuan Gas Fields.The cumulative total amount of the Tertiary geological reserves is over one trillion cubic meters.But these fields have large water production after the development of gas reservoirs.Only a small number of wells have cumulative output of more than 50 million cubic meters.In 2012,the risk exploration Well ZT1 was drilled in Zhongtaishan area,the transitional zone of central-west Sichuan Basin,tested a large gas flow from Xujiahe Formation reservoir.Besides,the well has a high volume of gas production and a small amount of water-yielding,and has already produced more than a trillion cubic meters of natural gas so far.By means of analyzing the geological conditions of large production wells of typical gas reservoirs,the difference analysis of high yield factors between the Zhongtaishan area and other areas in central Sichuan is carried out.It is believed that the accumulation conditions and main controlling factors of gas reservoir in Zhongtaishan area are the high quality hydrocarbon source,channel sandstone reservoir and tectonic fractures.The high quality source rock provides sufficient gas source for the tight sandstone.Thehigh-quality channel sandstone reservoir forms the high-abundance gas reservoir and natural fracture is the key to high oil and gas yield.
The Xujiahe Formation in Sichuan Basin has typical characteristics of tight sandstone gas.The exploration of the Xujiahe tight gas reservoir has obtained good achievements since 2006,which has found Anyue and Hechuan Gas Fields.The cumulative total amount of the Tertiary geological reserves is over one trillion cubic meters.But these fields have large water production after the development of gas reservoirs.Only a small number of wells have cumulative output of more than 50 million cubic meters.In 2012,the risk exploration Well ZT1 was drilled in Zhongtaishan area,the transitional zone of central-west Sichuan Basin,tested a large gas flow from Xujiahe Formation reservoir.Besides,the well has a high volume of gas production and a small amount of water-yielding,and has already produced more than a trillion cubic meters of natural gas so far.By means of analyzing the geological conditions of large production wells of typical gas reservoirs,the difference analysis of high yield factors between the Zhongtaishan area and other areas in central Sichuan is carried out.It is believed that the accumulation conditions and main controlling factors of gas reservoir in Zhongtaishan area are the high quality hydrocarbon source,channel sandstone reservoir and tectonic fractures.The high quality source rock provides sufficient gas source for the tight sandstone.Thehigh-quality channel sandstone reservoir forms the high-abundance gas reservoir and natural fracture is the key to high oil and gas yield.
引文
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[16] Li Jianzhong,Zheng Min,Chen Xiaoming,et al.Connoation analyses,source-reservoir assemblage types and development potential of unconventional hydrocarbon in China[J].Acta Petrolei Sinica,2015,36(5):521-532.李建忠,郑民,陈晓明,等.非常规油气内涵辨析、源—储组合类型及中国非常规油气发展潜力[J].石油学报,2015,36(5):521-532.
[17] Chen C,Xu G S,Xu F H,et al.The sequence of densification and hydrocarbon charging of Xu2reservoir in the Anyue-Hechuan area,Sichuan Basin,China[J]Journal of Central South University,2016,23(6):1439-1448.
[18] Wang Xiaojuan,Xie Jirong,Tang Dahai,et al.Reservoir distribution of Xujiahe 2menber,Central Sichuan Basin[J].Natual Gas Exploration&Development,2015,38(3):1-6.王小娟,谢继容,唐大海,等.川中地区须家河组二段优质储层分布特征[J].天然气勘探与开发,2015,38(3):1-6.
[19] Jiang Zaixing,Tian Jijun,Chen Guiju,et al.Sedmientary characteristics of the Upper Triassic in western Sichuan foreland basin[J]Journal of Palaeogeograpy,2007,9(2):143-153.姜在兴,田继军,陈桂菊,等.川西前陆盆地上三叠统沉积特征[J].古地理学报,2007,9(2):143-153.
[20] Xie Jirong,Li Guohui,Luo Fengzi.Reservoir characteristics of the Upper Trassic Xujiahe Formation in Sichuan Basin,China[J].Journal of Chengdu University of technology:Science&Techonology Edition,2009,36(1):13-18.谢继容,李国辉,罗凤姿.四川盆地上三叠统须家河组储集特征[J].成都理工大学学报:自然科学版,2009,36(1):13-18.
[2] Wang Jinqi.China’s large compact sandstone gas zone outlook[J].Natural Gas Industry,2000,20(1):10-16.王金琪,中国大型致密砂岩含气区展望[J].天然气工业,2000,20(1):10-16.
[3] Yang Tao,Zhang Guosheng,Liang Kun,et al.The exploration of global tight sandstone gas and forecast of the development tendency in China[J].Engineering Sciences,2012,14(6):64-68.杨涛,张国生,梁坤,等,全球致密气勘探开发进展及中国发展趋势预测[J].中国工程科学,2012,14(6):64-68.
[4] Bian Congsheng,Wang Hongjun,Wang Zecheng,et al.Exploration status and potential evaluation of tight gas in Sichuan Basin[J],Engineering Sciences,2012,14(7):74-80.卞从胜,王红军,汪泽成,等,四川盆地致密砂岩气藏勘探现状与资源潜力评价[J].中国工程科学,2012,14(7):74-80.
[5] Xu Fanghao,Yuan Haifeng,Huang Su,et al.Accumulation mechanism of the compacted sandstone gas in Xujiahe Formation of Central Sichuan in China[J]Journal of Chengdu University of Technology:Science&Technology Edition,2012,39(2):158-163.徐昉昊,袁海锋,黄素,等.川中地区须家河组致密砂岩气成藏机理[J].成都理工大学学报:自然科学版,2012,39(2):158-163.
[6] Luo Qihou,Wang Shiqian.Study on the Upper Triassic Sedimentary Facies and Oil Conditions in the Upper Midwest of Sichuan Basin[R].Chengdu:Research Institute of Exploration and Development of Sichuan Petroleum Administration,1994.罗启厚,王世谦.四川盆地中西部上三叠统沉积相与生油条件研究[R].成都:四川石油管理局勘探开发研究院,1994.
[7] Xie Jirong,Zhang Jian,Li Guohui,et al.Exploration prospect and gas reservoir charateristics of Xujiahe Formation in Sichuan Basin[J].Journal of Southwest Petroleum University:Science&Technology Edition,2008,30(6):40-44.谢继荣,张健,李国辉,等.四川盆地须家河组气藏成藏特点及勘探前景[J].西南石油大学学报:自然科学版,2008,30(6):40-44.
[8] Zou Caineng,Tao Shizhen,Zhu Rukai,et al.Formation and distribution of“continuous”gas reservoirs and their giant gas province:A case from the Upper Triassic Xujiahe Formation giant gas province,Sichuan Basin[J].Petroleum Exploration and Development,2009,36(3):307-319.邹才能,陶士振,朱如凯,等.“连续型”气藏及其大气区形成机制与分布——以四川盆地上三叠统须家河组煤系大气区为例[J].石油勘探与开发,2009,36(3):307-319.
[9] Du Jinhu,Xu Chunchuan,Wei Guoqi,et al.Exploration of Lithology Atmosphere of Xujiahe Formation in Sichuan Basin[M].Beijing:Petroleum Industry Press,2011:1-2.杜金虎,徐春春,魏国齐,等.四川盆地须家河组岩性大气区勘探[M].北京:石油工业出版社,2011:1-2.
[10] Zhong Bing,Yang Hongzhi,Xu Wei,et al.Assessment and optimization of the gas play fairways in the Upper Triassic Xujiahe Formation of the Central Sichuan Basin[J]Natrual Gas Industry,2012,32(3):62-64.钟兵,杨洪志,徐伟,等.川中地区上三叠统须家河组气藏开发有利区评价与优选技术[J].天然气工业,2012,32(3):62-64.
[11] Yi Shiwei,Lin Shiguo,Yang Wei,et al.Condition of Xujiahe Formation large gas province formation in Sichuan Basin[J].Natrual Gas Geoscience,2013,24(1):1-8.易士威,林世国,杨威,等,四川盆地须家河组大气区形成条件[J].天然气地球科学,2013,24(1):1-8.
[12] Zhai Guangming.Petroleum Geology of China,Vol.10:Sichuan Oil and Gas Zones[M].Beijing:Petroleum Industry Press,1989:62-63.翟光明.中国石油地质志,卷十:四川油气区[M].北京:石油工业出版社,1989:62-63.
[13] Li Guohui,Xie Jirong,Jiang Weixiong,et al.Lithologic Reservoir Enrichment Regularity and Target Evaluation of Sichuan Basin[R].Chengdu:Exploration and Development Research Institute,PetroChina Southwest Oil&Gasfield Company,2010:65-66.李国辉,谢继容,蒋伟雄,等.四川盆地岩性油气藏富集规律与目标评价[R].成都:中国石油西南油气田公司勘探开发研究院,2010:65-66.
[14] Zhao Zhengwang,Xie Jirong,Li Nan,et al.Gas exploration potential of the 1st,3rd,and 5th members of Xujiahe Formation reservoirs in the Sichuan Basin[J].Natrual Gas Industry,2013,33(6):23-28.赵正望,谢继荣,李楠,等,四川盆地须家河组一、三、五段天然气勘探潜力分析[J]天然气工业,2013,33(6):23-28.
[15] Liu Shugen,Li Zhiwu,Sun Wei,et al,Basic geological features of superimposed basin and hydrocarbon accumulation in Sichuan Basin,China[J].Chinese Journal of Geology,2011,46(1):233-257.刘树根,李智武,孙玮,等,四川含油气叠合盆地基本特征[J].地质科学,2011,46(1):233-257.
[16] Li Jianzhong,Zheng Min,Chen Xiaoming,et al.Connoation analyses,source-reservoir assemblage types and development potential of unconventional hydrocarbon in China[J].Acta Petrolei Sinica,2015,36(5):521-532.李建忠,郑民,陈晓明,等.非常规油气内涵辨析、源—储组合类型及中国非常规油气发展潜力[J].石油学报,2015,36(5):521-532.
[17] Chen C,Xu G S,Xu F H,et al.The sequence of densification and hydrocarbon charging of Xu2reservoir in the Anyue-Hechuan area,Sichuan Basin,China[J]Journal of Central South University,2016,23(6):1439-1448.
[18] Wang Xiaojuan,Xie Jirong,Tang Dahai,et al.Reservoir distribution of Xujiahe 2menber,Central Sichuan Basin[J].Natual Gas Exploration&Development,2015,38(3):1-6.王小娟,谢继容,唐大海,等.川中地区须家河组二段优质储层分布特征[J].天然气勘探与开发,2015,38(3):1-6.
[19] Jiang Zaixing,Tian Jijun,Chen Guiju,et al.Sedmientary characteristics of the Upper Triassic in western Sichuan foreland basin[J]Journal of Palaeogeograpy,2007,9(2):143-153.姜在兴,田继军,陈桂菊,等.川西前陆盆地上三叠统沉积特征[J].古地理学报,2007,9(2):143-153.
[20] Xie Jirong,Li Guohui,Luo Fengzi.Reservoir characteristics of the Upper Trassic Xujiahe Formation in Sichuan Basin,China[J].Journal of Chengdu University of technology:Science&Techonology Edition,2009,36(1):13-18.谢继容,李国辉,罗凤姿.四川盆地上三叠统须家河组储集特征[J].成都理工大学学报:自然科学版,2009,36(1):13-18.