川中古隆起震旦系&mdash;下寒武统温压演化及其对天然气成藏的影响

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川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

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中图分类号: P618.13

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Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

摘要

摘要: 根据热史研究成果，结合川中古隆起沉积埋藏史，恢复了震旦系—下寒武统烃源岩成熟度演化历史，确定了原油裂解的时期。利用盆地模拟方法，恢复了一维单井和二维剖面的压力演化历史，分析了川中古隆起震旦系—下寒武统异常压力的成因机制。烃源岩成熟度演化历史表明，震旦系—下寒武统烃源岩经历了早期生油、二次生油、干酪根裂解生气及晚期原油裂解四个演化阶段；原油裂解的开始时间大致是中、晚三叠世。川中古隆起震旦系—下寒武统主要经历了常压—增压—卸压的压力演化过程，白垩纪中期寒武系达到最大压力系数约1.7；威远—资阳地区压力系数较低，高石梯—磨溪构造带压力系数相对较高。研究发现快速埋藏、生烃作用及原油裂解是该地区超压形成的主要因素；燕山—喜山期的构造抬升使剩余压力降低，现今寒武系在局部地区仍保持超压。温压演化对天然气生成、运移、成藏及后期保存具有重要影响。
- 温度场 /
- 压力场 /
- 盆地模拟 /
- 油气成藏 /
- 川中古隆起
Abstract: The evolution of maturity of the Sinian-Lower Cambrian source rocks was reconstructed, and the starting time for oil cracking was also determined on the basis of the tectono-thermal history of Central Paleo-uplift, Sichuan Basin. The pressure evolution of some typical wells and 2D profile was simulated and the genetic mechanism of abnormal pressure in the Sinian-Low Cambrian was analyzed. The evolution of maturity indicated that the Sinian-Lower Cambrian source rocks experienced four stages, including first oil generation, second oil generation, kerogen cracking and late oil cracking. Oil cracking started at Middle-Late Triassic. The paleo-pressure evolution of the Sinian-Lower Cambrian consists of normal pressure, overpressure and pressure relief. The pressure coefficient of Cambrian maximized about 1.7 in Middle Cretaceous, and it was higher in Weiyuan-Ziyang area than Gaoshiti-Moxi structural belt. Rapid burial, hydrocarbon generation and late oil cracking are the primary factors for the overpressure. The excess pressure was relieved due to the tectonic uplift in Yanshan-Himalaya Periods, which resulted in the normal pressure in Sinian of the whole area and in Cambrian of Weiyuan-Ziyang area. However, the pressure coefficient of Cambrian maintains a high value about 1.5 in Gaoshiti-Moxi structural belt. The evolutions of temperature and pressure impacted gas generation, migration, accumulation and preservation significantly.
- temperature /
- pressure /
- basin modeling /
- gas accumulation /
- the central paleo-uplift

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[3]	孔令武, 赵红岩, 梁建设, 程涛, 王嘉, 赵佳奇, 喻英梅. 转换大陆边缘盆地深水浊积砂岩油气成藏差异性研究 . 沉积学报, 2022, 40(1): 244-254. doi: 10.14027/j.issn.1000-0550.2020.084
[4]	彭瀚霖, 马奎, 张玺华, 文龙, 王云龙, 田兴旺, 李勇, 杨岱林, 钟佳倚, 孙奕婷, 任纪博, 豆霜. 四川盆地埃迪卡拉晚期层序地层特征和沉积演化 . 沉积学报, 2021, 39(6): 1440-1450. doi: 10.14027/j.issn.1000-0550.2021.119
[5]	孙东, 潘建国, 胡再元, 杨丽莎, 周俊峰, 韩杰, 李闯, 房启飞. 塔里木盆地塔中Ⅲ区奥陶系碳酸盐岩油气成藏主控因素及有利区带 . 沉积学报, 2019, 37(4): 868-877. doi: 10.14027/j.issn.1000-0550.2018.176
[6]	沈卫兵, 庞雄奇, 陈践发, 王阳洋, 张科, 高兆富, 贾颖超, 陈泽亚. 塔里木盆地塔中隆起奥陶系碳酸盐岩油气运聚主控因素及成藏模式 . 沉积学报, 2018, 36(5): 1008-1022. doi: 10.14027/j.issn.1000-0550.2018.101
[7]	孙涛, 王建新, 孙玉梅. 西非塞内加尔盆地深水区油气地球化学特征与油气成藏 . 沉积学报, 2017, 35(6): 1284-1292. doi: 10.14027/j.cnki.cjxb.2017.06.019
[8]	田涛, 任战利, 吴晓青, 马国福, 张睿胜, 杨智明, 郭科. 雅布赖盆地萨尔台凹陷古地温场与油气成藏期次 . 沉积学报, 2015, 33(4): 836-844. doi: 10.14027/j.cnki.cjxb.2015.04.022
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川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

收稿日期: 2013-04-27

修回日期: 2013-08-26

刊出日期: 2014-06-10

中图分类号: P618.13

关键词:

温度场 /

压力场 /

盆地模拟 /

油气成藏 /

川中古隆起

摘要: 根据热史研究成果，结合川中古隆起沉积埋藏史，恢复了震旦系—下寒武统烃源岩成熟度演化历史，确定了原油裂解的时期。利用盆地模拟方法，恢复了一维单井和二维剖面的压力演化历史，分析了川中古隆起震旦系—下寒武统异常压力的成因机制。烃源岩成熟度演化历史表明，震旦系—下寒武统烃源岩经历了早期生油、二次生油、干酪根裂解生气及晚期原油裂解四个演化阶段；原油裂解的开始时间大致是中、晚三叠世。川中古隆起震旦系—下寒武统主要经历了常压—增压—卸压的压力演化过程，白垩纪中期寒武系达到最大压力系数约1.7；威远—资阳地区压力系数较低，高石梯—磨溪构造带压力系数相对较高。研究发现快速埋藏、生烃作用及原油裂解是该地区超压形成的主要因素；燕山—喜山期的构造抬升使剩余压力降低，现今寒武系在局部地区仍保持超压。温压演化对天然气生成、运移、成藏及后期保存具有重要影响。

Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

Received Date: 2013-04-27

Rev Recd Date: 2013-08-26

Publish Date: 2014-06-10

Keywords:

Abstract: The evolution of maturity of the Sinian-Lower Cambrian source rocks was reconstructed, and the starting time for oil cracking was also determined on the basis of the tectono-thermal history of Central Paleo-uplift, Sichuan Basin. The pressure evolution of some typical wells and 2D profile was simulated and the genetic mechanism of abnormal pressure in the Sinian-Low Cambrian was analyzed. The evolution of maturity indicated that the Sinian-Lower Cambrian source rocks experienced four stages, including first oil generation, second oil generation, kerogen cracking and late oil cracking. Oil cracking started at Middle-Late Triassic. The paleo-pressure evolution of the Sinian-Lower Cambrian consists of normal pressure, overpressure and pressure relief. The pressure coefficient of Cambrian maximized about 1.7 in Middle Cretaceous, and it was higher in Weiyuan-Ziyang area than Gaoshiti-Moxi structural belt. Rapid burial, hydrocarbon generation and late oil cracking are the primary factors for the overpressure. The excess pressure was relieved due to the tectonic uplift in Yanshan-Himalaya Periods, which resulted in the normal pressure in Sinian of the whole area and in Cambrian of Weiyuan-Ziyang area. However, the pressure coefficient of Cambrian maintains a high value about 1.5 in Gaoshiti-Moxi structural belt. The evolutions of temperature and pressure impacted gas generation, migration, accumulation and preservation significantly.

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川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

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Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

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川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

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Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

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川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

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Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

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出版历程

目录

川中古隆起震旦系—下寒武统温压演化及其对天然气成藏的影响

English Abstract

Characteristics and Effects on Gas Accumulation of the Sinian-Lower Cambrian Temperature-pressure Field in the Central Paleo-Uplift, Sichuan Basin

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目录

友情链接

期刊在线

联系我们