构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

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中图分类号: TE122.1

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Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

摘要

摘要: 含烃包裹体纤维状方解石脉被认为是超高压下油气流体形成和排泄的标志。大巴山前陆构造带一些断裂和下古生界黑色泥岩和泥灰岩烃源岩微裂隙中分布有含烃包裹体纤维状方解石脉，成分分析表明其为低镁方解石。纤维状方解石脉δ13CVPDB和δ18OVPDB比围岩碳酸盐岩的明显变轻，前者δ13CVPDB和δ18OVPDB变化范围分别为-1.9%～-4.8‰和-8.4%～-12.8‰，后者分别为-1.7%～+3.1‰和-8.7%～-4.5‰，且δ13C与δ18O具有明显的线性关系，反映出纤维状方解石脉具有成岩有机流体与浅部流体混合的流体特征。纤维状方解石脉含有共生的固体沥青包裹体、含甲烷液相包裹体和气液二相盐水包裹体等多相态包裹体，其中沥青包裹体为油气运移的残余沥青。气液二相盐水包裹体均一温度主要位于140℃和196℃之间（峰值为179℃），盐度较高（平均为9.7wt% NaCl）。分别应用盐水包裹体和甲烷包裹体等溶线P—T相图确定出含烃包裹体纤维状方解石脉形成的流体压力为150~200 MPa，属于异常超高压流体。地质和地球化学特征分析认为，大巴山含烃包裹体纤维状方解石脉不具有泥岩因压实成岩作用而形成的超高压流体特征。结合沉积和构造演化历史分析认为，印支碰撞造山运动和燕山前陆构造作用导致大巴山褶皱隆起并伴随天然气藏破坏和改造，挤压环境下的超高压构造应力驱动天然气流体排泄，大巴山前陆构造带含烃包裹体纤维状方解石脉就是超高压构造应力驱动天然气排泄的产物。
- 纤维状方解石脉 /
- 包裹体 /
- 超高压流体 /
- 流体排泄 /
- 大巴山构造带
Abstract: Fibrous calcite veins with organic inclusions were considered as indication to oil/gas generation and expelling under overpressure. Abundant fibrous calcite veins contained hydrocarbonbearing inclusions filled in fractures were found in lower Paleozoic hydrocarbon source of black mudstone, clay shale and limestone as well as some faults in Dabashan Foreland Belt. Composition analysis shows that fibrous calcite veins are kind of low magnesium calcite which formed during later diagenesis rather than sedimentary period. 13CVPDB and 18OVPDB of fibrous calcite veins, ranging from -1.9‰ to -4.8‰ and -8.4‰ to -12.8, respectively, are lighter than that of surrounding carbonate rocks, ranging from -1.7‰ to +3.1‰ and -8.7‰ to -4.5‰, show obvious linear relationship, which indicates that fibrous calcite veins were mixture fluid from different source fluids. Fibrous calcite veins contain immiscible fluid inclusions such as solid bitumen, methane bearing liquid fluid inclusion and vaporliquid aqueous inclusions. Bitumen inclusions are residue organic during oil/gas migration. Homogeneous temperatures of vaporliquid aqueous inclusions are from 140 to 196 ℃ with peak of 179℃. Salinities of vaporliquid aqueous inclusions are high with average of 9.7 wt% NaCl. Mehtods of IsoPT phase diagrams of aqueous fluid inclusions and methane inclusions were used to get fluid pressure when fibrous calcite veins formed. The pressure of fibrous calcite vein with hydrocarbonbearing inclusions in Dabashan Foreland Belt is from 150 to 200 MPa, which indicates of abnormal overpressure fluid. Geology and geochemistry features indicate that fibrous calcite veins contained hydrocarbonbearing inclusions are not fluid formed by overpressure of mudrocks source rocks at shallow buried phase. However, combined with the regional sedimentary characteristics and tectonic evolution, it indicates that fibrous calcite veins contained hydrocarbonbearing inclusions were fluid of natural gas drove to expel under overpressure of tectonic stress during InidanChina tectonic movement and Yanshan Foreland tectonics.
- fibrous calcite veins /
- fluid inclusion /
- overpressure fluid /
- fluid flow expelling /
- Dabashan orogenic belt

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[1]	黄若鑫, 张昌民, 冯文杰. 冲断带构造作用控制下的分支河流体系特征及其成因分析 . 沉积学报, 2022, 40(1): 166-181. doi: 10.14027/j.issn.1000-0550.2020.089
[2]	马强, 张殿伟, 王贵文, 朱东亚, 张荣强, 李天义. 断层流体锶、碳、氧同位素示踪评价断层垂向封闭性——以焦石坝背斜带为例 . 沉积学报, 2017, 35(6): 1205-1216. doi: 10.14027/j.cnki.cjxb.2017.06.012
[3]	. 利用天然气包裹体方法划分天然气成藏期次——以鄂尔多斯盆地东南部上古生界储层为例 . 沉积学报, 2013, 31(04): 693-698.
[4]	. 琼东南盆地崖城地区流体包裹体特征和油气充注期次分析 . 沉积学报, 2012, 30(1): 189-196.
[5]	闫臻. 北大巴山与志留纪火山作用相关的碳酸盐岩沉积学特征及形成环境 . 沉积学报, 2011, 29(1): 31-40.
[6]	王祥. 流体包裹体微量元素在油气勘探中的应用——以塔里木盆地塔中地区为例 . 沉积学报, 2011, 29(5): 986-993.
[7]	郝乐伟. 番禺低隆起—白云凹陷北坡第三系储层次生孔隙形成机理分析 . 沉积学报, 2011, 29(4): 734-743.
[8]	李忠. 塔里木盆地塔河奥陶系碳酸盐岩储层埋藏成岩和构造—热流体作用及其有效性 . 沉积学报, 2010, 28(5): 969-979.
[9]	陈勇. 东营凹陷民丰洼陷深层天然气储层流体包裹体油气地质研究 . 沉积学报, 2010, 28(3): 620-625.
[10]	曹剑. 准噶尔盆地石炭—二叠系方解石脉的碳、氧、锶同位素组成与含油气流体运移 . 沉积学报, 2007, 25(5): 722-729.
[11]	李慧莉, 邱楠生, 金之钧, 吕修祥. 塔里木盆地克拉2气田储层流体包裹体与油气成藏研究 . 沉积学报, 2003, 21(4): 648-653.
[12]	杨荣生, 张铭杰, 张同伟, 李立武, 唐俊红. 川西南碳酸盐岩储层流体包裹体气体地球化学研究 . 沉积学报, 2003, 21(3): 522-527.
[13]	谈迎, 刘德良, 杨晓勇, 张交东, 李振生. 沉积岩包裹体烃源条件时间温度指数判别法的探讨——以鄂尔多斯下古生界为例 . 沉积学报, 2003, 21(2): 328-333.
[14]	柳广弟, 张仲培, 张枝焕, 陈文学, 陈文礼, 李永林. 焉耆盆地三工河组储层流体包裹体形成期次分析 . 沉积学报, 2002, 20(2): 345-348.
[15]	刘德良, 谈迎, 孙先如, 李振生, 方国庆, 陶士振. 鄂尔多斯古生界流体包裹体特征及其与油气演化关系 . 沉积学报, 2002, 20(4): 695-704.
[16]	曹宏. 分异流体河口作用 . 沉积学报, 1998, 16(2): 92-96.
[17]	姜峰, 杜建国, 王万春, 曹正林. 高温超高压模拟实验研究Ⅰ.温压条件对有机质成熟作用的影响 . 沉积学报, 1998, 16(3): 153-155,160.
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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

刊出日期: 2013-06-10

中图分类号: TE122.1

关键词:

包裹体 /

摘要: 含烃包裹体纤维状方解石脉被认为是超高压下油气流体形成和排泄的标志。大巴山前陆构造带一些断裂和下古生界黑色泥岩和泥灰岩烃源岩微裂隙中分布有含烃包裹体纤维状方解石脉，成分分析表明其为低镁方解石。纤维状方解石脉δ13CVPDB和δ18OVPDB比围岩碳酸盐岩的明显变轻，前者δ13CVPDB和δ18OVPDB变化范围分别为-1.9%～-4.8‰和-8.4%～-12.8‰，后者分别为-1.7%～+3.1‰和-8.7%～-4.5‰，且δ13C与δ18O具有明显的线性关系，反映出纤维状方解石脉具有成岩有机流体与浅部流体混合的流体特征。纤维状方解石脉含有共生的固体沥青包裹体、含甲烷液相包裹体和气液二相盐水包裹体等多相态包裹体，其中沥青包裹体为油气运移的残余沥青。气液二相盐水包裹体均一温度主要位于140℃和196℃之间（峰值为179℃），盐度较高（平均为9.7wt% NaCl）。分别应用盐水包裹体和甲烷包裹体等溶线P—T相图确定出含烃包裹体纤维状方解石脉形成的流体压力为150~200 MPa，属于异常超高压流体。地质和地球化学特征分析认为，大巴山含烃包裹体纤维状方解石脉不具有泥岩因压实成岩作用而形成的超高压流体特征。结合沉积和构造演化历史分析认为，印支碰撞造山运动和燕山前陆构造作用导致大巴山褶皱隆起并伴随天然气藏破坏和改造，挤压环境下的超高压构造应力驱动天然气流体排泄，大巴山前陆构造带含烃包裹体纤维状方解石脉就是超高压构造应力驱动天然气排泄的产物。

Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

Publish Date: 2013-06-10

Keywords:

Abstract: Fibrous calcite veins with organic inclusions were considered as indication to oil/gas generation and expelling under overpressure. Abundant fibrous calcite veins contained hydrocarbonbearing inclusions filled in fractures were found in lower Paleozoic hydrocarbon source of black mudstone, clay shale and limestone as well as some faults in Dabashan Foreland Belt. Composition analysis shows that fibrous calcite veins are kind of low magnesium calcite which formed during later diagenesis rather than sedimentary period. 13CVPDB and 18OVPDB of fibrous calcite veins, ranging from -1.9‰ to -4.8‰ and -8.4‰ to -12.8, respectively, are lighter than that of surrounding carbonate rocks, ranging from -1.7‰ to +3.1‰ and -8.7‰ to -4.5‰, show obvious linear relationship, which indicates that fibrous calcite veins were mixture fluid from different source fluids. Fibrous calcite veins contain immiscible fluid inclusions such as solid bitumen, methane bearing liquid fluid inclusion and vaporliquid aqueous inclusions. Bitumen inclusions are residue organic during oil/gas migration. Homogeneous temperatures of vaporliquid aqueous inclusions are from 140 to 196 ℃ with peak of 179℃. Salinities of vaporliquid aqueous inclusions are high with average of 9.7 wt% NaCl. Mehtods of IsoPT phase diagrams of aqueous fluid inclusions and methane inclusions were used to get fluid pressure when fibrous calcite veins formed. The pressure of fibrous calcite vein with hydrocarbonbearing inclusions in Dabashan Foreland Belt is from 150 to 200 MPa, which indicates of abnormal overpressure fluid. Geology and geochemistry features indicate that fibrous calcite veins contained hydrocarbonbearing inclusions are not fluid formed by overpressure of mudrocks source rocks at shallow buried phase. However, combined with the regional sedimentary characteristics and tectonic evolution, it indicates that fibrous calcite veins contained hydrocarbonbearing inclusions were fluid of natural gas drove to expel under overpressure of tectonic stress during InidanChina tectonic movement and Yanshan Foreland tectonics.

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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

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Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

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Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

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Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

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出版历程

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构造驱动大巴山前陆烃类流体排泄：含烃包裹体纤维状方解石脉证据

English Abstract

Tectonically Driven Organic Fluid Flow in Dabashan Foreland Belt: Recorded by fibrous calcite veins contained hydrocarbon bearing inclusions

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期刊在线

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