CO2 gas emplacement age in the Songliao Basin: Insight from volcanic quartz 40Ar-39Ar stepwise crushing

Jianbing, Yun; Wu, Hanning; Feng, Zihui; Mei, Lianfu; Qiu, Hua‐Ning

doi:10.1007/s11434-010-3082-y

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…Therefore, according to the comprehensive identification of solid bitumen in reservoir and natural gas  13 C 1 and  13 C 2 , reef and oolitic reservoirs in the Luojiazhai-Puguang area are dominated by oil-type cracked gas; the Longgang platform margin zone is dominated by coal-sourced gas but with a portion of oiltype gas contributing; and the Longgang intra-platform zone has only coal-sourced gas accumulation. According to the accumulative time effect of argon isotopes, the value of 40 Ar/ 36 Ar can be used to estimate the age of natural gas source rocks [24][25][26]. The natural gas 40 Ar/ 36 Ar in Puguang gas field was measured by previous researchers [11].…”

Section: Gas Source Conditionsmentioning

confidence: 99%

Comparative study of gas accumulations in the Permian Changxing reefs and Triassic Feixianguan oolitic reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin

Zhao¹,

Xu²,

Wang

et al. 2011

Chin. Sci. Bull.

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Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have been discovered in both the Luojiazhai-Puguang and Longgang areas of the Sichuan Basin, but the accumulation scale, abundance and distribution patterns differ greatly. In fact, the two areas have more differences than they have similarities. Similarities include: (1) the lithology, properties and types of porosity of the reef and oolitic reservoirs are primarily consistent in the two areas; (2) well-developed regional caprocks that seal the fluid system; and (3) accumulation process histories, with liquid hydrocarbon charging at an early stage, cracking into gas at a high to over-mature stage, adjustment of gas reservoirs at an uplifting stage, and final reservoir generation at a late stage. Differences include: (1) gas accumulations in the Luojiazhai-Puguang area that are dominated by oil-type cracked gas, with multiple and sufficient gas sources, contrasting with gas accumulations in the Longgang area that are dominated by coal-sourced gas with insufficient gas sources; (2) heterogeneity and horizontal diversity of reservoirs in the Longgang area that are stronger than in the Luojiazhai-Puguang area; and (3) the development of deep and large faults in the Luojiazhai-Puguang area that link source, reservoir and migration pathways, contrasting with poorly developed faults in Longgang area, where laterally variable fractures are the major migration pathway. Because of these differences, abundant large-scale structurally-controlled gas accumulations are developed in the Luojiazhai-Puguang area, whereas lithology plays a more important role in gas accumulation in the Longgang area where accumulations are smaller-scale and have lower gas-bearing abundance. We suggest that future exploration for reef and oolitic gas accumulations should be strengthened in NE Sichuan and NW Sichuan Jiulongshan. In particular, the transitional zone between Longgang and Kaijiang-Liangping Bay has the best potential for new discoveries.advantage transport of fault pathway, non-equilibrium transport of fracture pathway, integral accumulation with high abundance, heterogeneous accumulation with low abundance, Sichuan Basin

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Section: Gas Source Conditionsmentioning

confidence: 99%

Comparative study of gas accumulations in the Permian Changxing reefs and Triassic Feixianguan oolitic reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin

Zhao¹,

Xu²,

Wang

et al. 2011

Chin. Sci. Bull.

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“…This purification system showed the ability to remove the organic impurities m/e=37 effectively from the illite samples from the oil fields ( Figure 2). Using this purification system, the oil/gas emplacement ages were successfully obtained for the oilfields in Pearl River Mouth Basin, South China sea (Yun et al, , 2010aShi et al, 2011) and for the gas fields in the Songliao Basin (Yun et al, 2010b;Qiu et al, 2011) by 40 Ar/ 39 Ar dating. Because the illite released a large amount of organic im- Figure 1 Peak scanning for unirradiated illite purified by a normal preparation system of the MM-1200 instrument in Guangzhou .…”

Section: Introductionmentioning

confidence: 99%

A novel purification technique for noble gas isotope analyses of authigenic minerals

Qiu

Hu³

et al. 2015

Sci. China Earth Sci.

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Noble and active gases are released from geological samples during gas extraction for noble gas isotope analyses. The active gases should be removed before inletting to mass spectrometers for the analyses. The normal noble gas preparation systems can clean up most geological samples. However, authigenic minerals from sedimentary rocks in oil/gas fields contain organic matter, which cannot be cleaned up by the normal preparation systems and thus influence the noble gas analyses. We introduce a novel gas purification system (PRC patent No. ZL201320117751.2), which includes several reversible purification pumps with different absorbing and degassing temperatures. It can well clean up water steam, carbon dioxide and organic gases. Mica minerals are often used for 40 Ar/ 39 Ar dating. A muscovite sample (2082MS) which could not be cleaned up by the normal preparation system with two SAES NP10 ® getters, becomes the test sample for a comparative experiment in this study. The experiment is assigned into 4 sections with the organic gas removal system (OGRS) "Closed/Opened" in turn. When the OGRS is closed only with two NP10 getters for purification, the 40 Ar intensities increase in curves with inlet time because of impurities, the 40 Ar/ 39 Ar dating results yield age errors about 2%-1% (2) . When the OGRS is opened for purification, in contrast, the 40 Ar intensities decrease linearly with inlet time. This indicates that the gases have been cleaned up effectively, and the 40 Ar/ 39 Ar results yield ages with errors in 0.4%. The OGRS is very helpful to obtain high-quality analysis data.

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“…Nevertheless, isotopic dating methods are the inevitable development trend in microcosmic, direct and quantitative hydrocarbon geochronology. Some hydrocarbon migration relational minerals [5,[15][16][17][18][19][20][21] and hydrocarbon generation primary materials or products [22][23][24][25][26] such as kerogen, bitumen and heavy oil can be used to determine the hydrocarbon accumulation time with feasible isotopic dating methods. K-Ar and 40 Ar/ 39 Ar dating of authigenic illite in a reservoir is relatively widely used, but it can only estimate the earliest time of hydrocarbon migration [15].…”

mentioning

confidence: 99%

“…A special apparatus designed by Qiu et al [17,30,31] has been used to clean up the organic gases in samples contaminated with residues from oil or gas fields, resulting in credible 40 Ar/ 39 Ar data. This technique has been used to date the CH 4 -CO 2 -saline bearing secondary inclusions in quartz from deep volcanic rocks of the Yingcheng Formation in the Songliao Basin by the 40 Ar/ 39 Ar stepwise crushing technique and thereby determine the CO 2 gas emplacement age [18,19,31]. The exact isotopic age for this CO 2 gas reservoir shows the good and wide application of the quartz inclusion 40 Ar/ 39 Ar dating technique to hydrocarbon geochronology research.…”

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confidence: 99%

40Ar/39Ar geochronology constraints on hydrocarbon accumulation and destruction periods in the Bankeng paleo-reservoir in the southern margin of the middle Yangtze block

et al. 2011

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The exact determination of isotopic ages of hydrocarbon accumulation, reconstruction and destruction periods using traditional isotopic dating methods is complex because of the small numbers of minerals that correlate with hydrocarbons. The quantitative and direct study of hydrocarbon geochronology is therefore an important scientific problem for isotope geochronology and petroleum geology. This study obtains two isotopic ages from a quartz vein sample associated with bitumen in a reverse fault located in the Bankeng paleo-reservoir on the southern margin of the middle Yangtze block (the northern margin of the JiangnanXuefeng uplift) by inclusion 40 Ar/ 39 Ar stepwise crushing in a vacuum. Two different and good linear inverse isochrons that correspond to two age plateaus were determined. The two ages correspond to primary inclusions of about 228 Ma and secondary inclusions of about 149 Ma. These inclusion groups represent two distinct kinds of fluids. Quartz veins associated with bitumen in faulted paleo-reservoirs, which have a strict response relationship with tectonization and hydrocarbon accumulation, are the unified products of tectonic processes, hydrocarbon accumulation and reconstruction. Therefore, they can be used to constrain the hydrocarbon accumulation, reconstruction and destruction periods that are controlled by multiphase and complicated tectonic actions. The evolutionary processes of hydrocarbon accumulation can be divided into two periods consisting of a primary oil and gas reservoir formation period in the late Indosinian epoch (about 228 Ma) and a period of oil and gas reservoir reconstruction in the early Yanshan epoch (about 149 Ma). This study quantitatively reconstructs the hydrocarbon accumulation and destruction chronological framework of a giant hydrocarbon accumulation belt along the southern margin of the middle Yangtze block (the northern margin of the Jiangnan-Xuefeng uplift) controlled by multiphase and complicated tectonism. The two ages associated with hydrocarbons here correspond to the special controlling actions of continental tectonics in the Jiangnan-Xuefeng uplift that affected the timeline of reconstruction and destruction in this giant marine hydrocarbon accumulation. This study shows the feasibility and usefulness of dating inclusions with the 40 Ar/ 39 Ar technique for hydrocarbon geochronology, especially in the marine hydrocarbon accumulation region of southern China within a geological setting of old strata, high thermal evolution hydrocarbons, and complex, multiphase and multicycle tectonization. hydrocarbon geochronology, fluid inclusion, 40 Ar/ 39 Ar dating method, paleo-reservoir, middle Yangtze block, JiangnanXuefeng uplift Citation: Liu Z Q, Mei L F, Qiu H N, et al. 40 Ar/ 39 Ar geochronology constraints on hydrocarbon accumulation and destruction periods in the Bankeng paleoreservoir in the southern margin of the middle Yangtze block.

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CO2 gas emplacement age in the Songliao Basin: Insight from volcanic quartz 40Ar-39Ar stepwise crushing

Cited by 9 publications

References 10 publications

Comparative study of gas accumulations in the Permian Changxing reefs and Triassic Feixianguan oolitic reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin

Comparative study of gas accumulations in the Permian Changxing reefs and Triassic Feixianguan oolitic reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin

A novel purification technique for noble gas isotope analyses of authigenic minerals

40Ar/39Ar geochronology constraints on hydrocarbon accumulation and destruction periods in the Bankeng paleo-reservoir in the southern margin of the middle Yangtze block

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