渤海海域渤中凹陷渤中19-6大型凝析气田天然气来源探讨
TE122.1; 渤海海域渤中19-6大型凝析气田的发现为渤中凹陷寻找大气田带来了希望和信心,深入研究其天然气的来源和成因对今后渤海天然气勘探具有重要指导意义.通过对开放和密闭体系热模拟实验结果分析,综合地球化学和数值模拟研究表明,渤海优质腐泥型湖相烃源岩[ω(TOC)=3.93％,IH=727 mg/g(每克有机碳中干酪根热解烃量,下同)]干酪根热解累积生气的比例仅为10％,以排油为主;偏腐殖型湖相烃源岩热解生气比例也不大,IH=100 mg/g时干酪根热解累积生气比例仅为30％,但由于干酪根的吸附作用,其中的残留烃在烃源岩中裂解成气,最后以排气为主.渤中19-6天然气为沙三段Ⅱ1、Ⅱ2和Ⅲ...
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| Published in | 石油实验地质 Vol. 44; no. 2; pp. 324 - 336 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中海油研究总院有限责任公司,北京 100028%中海石油(中国)有限公司,北京 100010
2022
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-6112 |
| DOI | 10.11781/sysydz202202324 |
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| Abstract | TE122.1; 渤海海域渤中19-6大型凝析气田的发现为渤中凹陷寻找大气田带来了希望和信心,深入研究其天然气的来源和成因对今后渤海天然气勘探具有重要指导意义.通过对开放和密闭体系热模拟实验结果分析,综合地球化学和数值模拟研究表明,渤海优质腐泥型湖相烃源岩[ω(TOC)=3.93％,IH=727 mg/g(每克有机碳中干酪根热解烃量,下同)]干酪根热解累积生气的比例仅为10％,以排油为主;偏腐殖型湖相烃源岩热解生气比例也不大,IH=100 mg/g时干酪根热解累积生气比例仅为30％,但由于干酪根的吸附作用,其中的残留烃在烃源岩中裂解成气,最后以排气为主.渤中19-6天然气为沙三段Ⅱ1、Ⅱ2和Ⅲ型混合烃源岩成熟到高成熟阶段的产物,是干酪根热解气与残留烃裂解气的混合物,且其供烃区为渤中凹陷西南的局部区域,供烃区古近系沙河街组沙三段烃源岩早期以排油为主,晚期(15 Ma以后)以排气为主,晚期排气量占总排气量的82％.下一步在渤中凹陷寻找大气田要选择供烃区烃源岩排烃气油比大、以排气为主的目标进行钻探. |
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| AbstractList | TE122.1; 渤海海域渤中19-6大型凝析气田的发现为渤中凹陷寻找大气田带来了希望和信心,深入研究其天然气的来源和成因对今后渤海天然气勘探具有重要指导意义.通过对开放和密闭体系热模拟实验结果分析,综合地球化学和数值模拟研究表明,渤海优质腐泥型湖相烃源岩[ω(TOC)=3.93％,IH=727 mg/g(每克有机碳中干酪根热解烃量,下同)]干酪根热解累积生气的比例仅为10％,以排油为主;偏腐殖型湖相烃源岩热解生气比例也不大,IH=100 mg/g时干酪根热解累积生气比例仅为30％,但由于干酪根的吸附作用,其中的残留烃在烃源岩中裂解成气,最后以排气为主.渤中19-6天然气为沙三段Ⅱ1、Ⅱ2和Ⅲ型混合烃源岩成熟到高成熟阶段的产物,是干酪根热解气与残留烃裂解气的混合物,且其供烃区为渤中凹陷西南的局部区域,供烃区古近系沙河街组沙三段烃源岩早期以排油为主,晚期(15 Ma以后)以排气为主,晚期排气量占总排气量的82％.下一步在渤中凹陷寻找大气田要选择供烃区烃源岩排烃气油比大、以排气为主的目标进行钻探. |
| Author | 姚爽 仝志刚 何将启 李友川 |
| AuthorAffiliation | 中海油研究总院有限责任公司,北京 100028%中海石油(中国)有限公司,北京 100010 |
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| Author_FL | LI Youchuan HE Jiangqi YAO Shuang TONG Zhigang |
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| DocumentTitle_FL | Gas source of BZ19?6 condensate gas field in Bozhong Sag, Bohai Sea area |
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| Keywords | 热模拟实验;排烃气油比;供烃区;渤中19-6凝析气田;渤中凹陷;渤海海域 |
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| Title | 渤海海域渤中凹陷渤中19-6大型凝析气田天然气来源探讨 |
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