黄骅坳陷奥陶系古岩溶储层锶同位素地球化学特征

doi:10.19657/j.geoscience.1000-8527.2020.04.17

摘要/Abstract

摘要：

为研究古岩溶储层锶同位素地球化学特征,以同位素地球化学实验为手段,结合全球锶同位素背景,探讨黄骅坳陷奥陶系岩溶储层锶同位素地球化学特征成因,分析其南、北区差异性。研究结果表明,黄骅坳陷奥陶系各组地层⁸⁷Sr/⁸⁶Sr值变化范围高于全球所在沉积时期的变化范围值,⁸⁷Sr/⁸⁶Sr值变化趋势与全球奥陶系所在沉积时期的变化趋势具有相似性;奥陶系原始碳酸盐岩地层经历了后期古岩溶作用和流体的改造,古陆富⁸⁷Sr流体对各类岩溶岩和填充物岩反应后大幅度提高⁸⁷Sr/⁸⁶Sr值;白云岩⁸⁷Sr/⁸⁶Sr值均明显高于同层位的灰岩,证实白云岩对⁸⁷Sr捕获能力普遍强于灰岩;黄骅坳陷北区经历的表生岩溶作用时间远大于南区,岩溶作用强度高于南区,北区富⁸⁷Sr流体置换作用亦强于南区,构成了锶同位素⁸⁷Sr/⁸⁶Sr值南低、北高的差异性。

关键词: 锶同位素, 岩溶作用, 储层, 黄骅坳陷, 地球化学, 奥陶系

Abstract:

To study the strontium (Sr) isotopic characteristics of paleokarst reservoirs, the origin of Sr isotope in Ordovician karst reservoirs in Huanghua depression was discussed via isotopic experiments and comparison with the global Sr isotope background. Isotopic differences between the southern and northern parts of the Huanghua Depression were analyzed. The results show that the ⁸⁷Sr/⁸⁶Sr variation range of the Ordovician strata in the Huanghua depression is wider than that of the global Ordovician sedimentation, but their ⁸⁷Sr/⁸⁶Sr variation trends are similar. The Ordovician primitive carbonate strata have undergone late paleokarstification and fluid transformation, and the paleo-continental ⁸⁷Sr-rich fluids were used for various types of karst and filling. The dolomite ⁸⁷Sr/⁸⁶Sr values are distinctly higher than those of the limestone in the same horizon, suggesting that the dolomite captures ⁸⁷Sr more readily than the limestone. Duration of supergene karstification in the northern Huanghua depression is much longer than that in the southern part. The karstification intensity of the former is also higher, and its ⁸⁷Sr-rich fluid displacement stronger, which probably generates the higher ⁸⁷Sr/⁸⁶Sr values in the northern part of Huanghua depression.

Key words: strontium isotope, karstification, reservoir, Huanghua depression, geochemistry, Ordovician

中图分类号:

TE122.2

张津宁, 周建生, 付立新, 李宏军, 楼达. 黄骅坳陷奥陶系古岩溶储层锶同位素地球化学特征[J]. 现代地质, 2020, 34(04): 821-827.

ZHANG Jinning, ZHOU Jiansheng, FU Lixin, LI Hongjun, LOU Da. Strontium Isotope Geochemistry of Ordovician Paleokarst Reservoirs in Huanghua Depression[J]. Geoscience, 2020, 34(04): 821-827.

图/表 7

参考文献 23

[1]	ISABEL M P. Late diagenetic dolomitization of Lower Ordovician Upper Knox carbonates: a record of the hydrodynamic evolution of the Southern Appalachian Basin[J]. AAPG Bulletin, 1994,78(8):1210-1239.
[2]	HARRIS N. Significance of weathering Himalayan metasedimentary rocks and leucogranites for the Sr isotope evolution of seawater during the Early Miocene[J]. Geology, 1995,23(9):795-798.
[3]	DENISON R E, KOEPNICK R B, BURKE W H, et al. Construction of the Cambrian and Ordovician seawater ⁸⁷Sr/⁸⁶Sr curve[J]. Chemical Geology, 1998,152:325~ 340.
[4]	MCARTHUR J M, HOWARTH R J. Strontium isotope stratigraphy: lowess vension 3: best fit to the marine Sr isotope curve for 0~509 Ma and accompanying look-up table for deriving numerical age[J]. Journal Geology, 2001,109:155-170.
[5]	HEYDARI, EZAT. Meteoric versus burial control on porosity evolution of the Smackover Formation[J]. AAPG Bulletin, 2003,87(11):1779-1797.
[6]	BANNER J L. Radiogenic isotopes: systematics and applications to earth surface processes and chemical stratigraphy[J]. Earth-Science Reviews, 2004,65:141-194.
[7]	JACOBSON A D, WASSERBURG G J. Anhydrite and the Sr isotope evolution of groundwater in a carbonate aquifer[J]. Chemical Geology, 2005,214 : 331-350.
[8]	LOUCKS R G. Paleocave carbonate reservoirs: origins, burial-depth modification, spatial complexity, and reservoir implications[J]. AAPG Bulletin, 1999,83(11):1795-1834.
[9]	MCMECHAN G A, LOUCKS R G, MESCHER P, et al. Characterization of a coalesced, collapsed paleocave reservoir analog using GPR and well core data[J]. Geophysics, 2002,67(4):1148-1158.
[10]	BREESCH L, STEMMERIK L, WHEELER W, et al. Fluid flow reconstruction in a complex paleocave system reservoir in Wordiekammen, Central Spitsbergen[J]. Journal of Geochemical Exploration, 2009,101(1):10-21.
[11]	王东, 王国芝, 冉启贵, 等. 塔东地区古城4井上寒武统-中、上奥陶统流体地球化学失踪[J]. 现代地质, 2008,22(4):586-591.
[12]	郑荣才, 胡忠贵, 郑超, 等. 渝北—川东地区黄龙组古岩溶储层稳定同位素地球化学特征[J]. 地学前缘, 2008,15(6):303-311.
[13]	文华国, 郑荣才, 沈忠民, 等. 南大巴山前缘黄龙组古岩溶储层锶同位素地球化学特征[J]. 吉林大学学报(地球科学版), 2009,39(5):789-795.
[14]	文华国, 陈浩如, 温龙彬, 等. 四川盆地东部石炭系古岩溶储层成岩流体:来自流体包裹体、微量元素和C、O、Sr同位素的证据[J]. 岩石学报, 2014,30(3):655-666.
[15]	张涛, 云露, 邬兴威, 等. 锶同位素在塔河古岩溶期次划分中的应用[J]. 石油实验地质, 2005,27(3):299-303.
[16]	刘存革, 李国蓉, 张一伟, 等. 锶同位素在古岩溶研究中的应用——以塔河油田奥陶系为例[J]. 地质学报, 2007,81(10):1398-1406.
[17]	张津宁, 付立新, 周建生, 等. 渤海湾盆地黄骅坳陷古潜山的宏观展布特征与演化过程[J]. 地质学报, 2019,93(3):585-596.
[18]	张津宁, 周建生, 付立新, 等. 港北潜山内幕天然气成藏地质特征与成藏过程[J]. 中国矿业大学学报, 2019,48(5):980-991.
[19]	翟明国. 华北克拉通的形成演化与成矿作用[J]. 矿床地质, 2010,29(1):24-36.
[20]	陈世悦, 龚文磊, 张顺, 等. 黄骅坳陷沧东凹陷孔二段泥页岩裂缝发育特征及主控因素分析[J]. 现代地质, 2016,30(1):144-154.
[21]	程锦翔, 焦养泉, 张枝焕, 等. 华北地区东部下古生界烃源岩分布特征及其发育模式[J]. 现代地质, 2007,21(3):538-545.
[22]	付立新, 胡瑞波, 刘淑芝, 等. 黄骅盆地奥陶系古岩溶特征、演化及其对潜山油气聚集的控制作用[J]. 海相油气地质, 2001,6(2):21-27.
[23]	付立新, 楼达, 李宏军, 等. 印支—燕山运动对大港探区古潜山形成的控制作用[J]. 石油学报, 2016,37(增刊2):19-30.

井号	层位	岩性	⁸⁷Sr/⁸⁶Sr	误差(2σ)	井号	层位	岩性	⁸⁷Sr/⁸⁶Sr	误差(2σ)
BS6	Of	灰岩	0.708 64	±0.000 01	KG8	Of	灰岩	0.708 64	±0.000 01
BS6	Of	白云岩	0.709 00	±0.000 09	KG8	Of	灰岩	0.709 87	±0.000 03
BS6	Of	白云岩	0.709 06	±0.000 01	K19	Of	灰岩	0.708 59	±0.000 08
BS701	Ox	灰岩	0.709 57	±0.000 03	K19	Of	灰岩	0.708 60	±0.000 06
BS701	Ox	灰岩	0.709 12	±0.000 01	K19	Of	灰岩	0.709 45	±0.000 01
BS701	Ox	白云岩	0.709 51	±0.000 02	K19	Of	白云岩	0.709 65	±0.000 06
BS701	Ox	白云岩	0.709 88	±0.000 06	K19	Of	白云岩	0.709 43	±0.000 03
BS701	Ox	白云岩	0.709 55	±0.000 01	K19	Of	白云岩	0.709 32	±0.000 03
BS701	Ox	白云岩	0.709 77	±0.000 02	K19	Of	白云岩	0.709 33	±0.000 04
BS701	Ox	灰岩	0.709 7	±0.000 06	K19	Of	灰岩	0.709 25	±0.000 02
BS701	Ox	白云岩	0.709 71	±0.000 02	K24	Of	白云岩	0.710 42	±0.000 03
BS701	Ox	灰岩	0.709 37	±0.000 01	K24	Of	灰岩	0.708 52	±0.000 02
BS701	Ol	白云岩	0.709 51	±0.000 04	K24	Of	灰岩	0.709 34	±0.000 04
BS701	Ol	白云岩	0.709 42	±0.000 05	K24	Of	灰岩	0.709 43	±0.000 04
BS701	Ol	白云岩	0.709 79	±0.000 05	K24	Of	白云岩	0.709 33	±0.000 05
BG1	Ox	灰岩	0.709 09	±0.000 03	LG1	Of	灰岩	0.710 83	±0.000 01
BG1	Ox	白云岩	0.709 27	±0.000 07	LG1	Of	灰岩	0.709 16	±0.000 03
CC1	Of	灰岩	0.708 39	±0.000 01	YG1	Ox	灰岩	0.709 23	±0.000 04
CC1	Of	灰岩	0.708 91	±0.000 02	T12	Of	灰岩	0.708 87	±0.000 03
CC1	Ox	灰岩	0.708 75	±0.000 03	T13	Of	灰岩	0.710 02	±0.000 04
CG1	Of	灰岩	0.708 91	±0.000 07	T13	Of	白云岩	0.709 54	±0.000 03
CH1	Of	灰岩	0.708 9	±0.000 08	T14	Of	灰岩	0.709 33	±0.000 05
CH1	Os	灰岩	0.709 28	±0.000 03	T14	Of	白云岩	0.709 92	±0.000 02
CH1	Os	白云岩	0.709 33	±0.000 07	T15	Of	灰岩	0.709 34	±0.000 03
CH1	Os	灰岩	0.709 46	±0.000 06	T4	Of	灰岩	0.709 88	±0.000 02
CH1	Of	白云岩	0.709 14	±0.000 08	WG1	Of	灰岩	0.709 26	±0.000 02
G2035	Ol	灰岩	0.709 77	±0.000 06	WG1	Of	灰岩	0.710 13	±0.000 01
G2035	Ol	灰岩	0.709 37	±0.000 05	WG1	Of	白云岩	0.710 81	±0.000 03
G2035	Ol	灰岩	0.709 53	±0.000 04	X12	Of	白云岩	0.709 98	±0.000 02
GG4-1	Of	灰岩	0.709 33	±0.000 04	X12	Of	白云岩	0.709 80	±0.000 06
KG1	Of	白云岩	0.709 13	±0.000 07	X12	Of	白云岩	0.709 40	±0.000 04
KG7	Os	白云岩	0.709 81	±0.000 02	X12	Of	灰岩	0.708 94	±0.00001
KG7	Os	白云岩	0.709 61	±0.000 03	X12	Of	白云岩	0.710 38	±0.000 03
KG7	Os	白云岩	0.709 25	±0.000 02	X14	Of	灰岩	0.708 76	±0.000 01
KG7	Os	灰岩	0.709 36	±0.000 05	X14	Of	灰岩	0.708 88	±0.000 04
KG7	Os	灰岩	0.709 45	±0.000 06	X14	Of	灰岩	0.709 14	±0.000 02
ZG2	Os	灰岩	0.708 94	±0.000 06	X7	Of	灰岩	0.709 58	±0.000 02
ZG2	Os	白云岩	0.709 30	±0.000 01	X7	Of	白云岩	0.709 44	±0.000 03
X13	Of	白云岩	0.708 48	±0.000 05	QG1	Of	白云岩	0.708 93	±0.000 04
X13	Of	白云岩	0.708 84	±0.000 06	QG1	Of	白云岩	0.709 01	±0.000 04
X13	Of	白云岩	0.708 98	±0.000 03	QG1	Of	灰岩	0.709 30	±0.000 03
X13	Of	灰岩	0.708 57	±0.000 06

井号	层位	岩性	⁸⁷Sr/⁸⁶Sr	误差(2σ)	井号	层位	岩性	⁸⁷Sr/⁸⁶Sr	误差(2σ)
BS6	Of	灰岩	0.708 64	±0.000 01	KG8	Of	灰岩	0.708 64	±0.000 01
BS6	Of	白云岩	0.709 00	±0.000 09	KG8	Of	灰岩	0.709 87	±0.000 03
BS6	Of	白云岩	0.709 06	±0.000 01	K19	Of	灰岩	0.708 59	±0.000 08
BS701	Ox	灰岩	0.709 57	±0.000 03	K19	Of	灰岩	0.708 60	±0.000 06
BS701	Ox	灰岩	0.709 12	±0.000 01	K19	Of	灰岩	0.709 45	±0.000 01
BS701	Ox	白云岩	0.709 51	±0.000 02	K19	Of	白云岩	0.709 65	±0.000 06
BS701	Ox	白云岩	0.709 88	±0.000 06	K19	Of	白云岩	0.709 43	±0.000 03
BS701	Ox	白云岩	0.709 55	±0.000 01	K19	Of	白云岩	0.709 32	±0.000 03
BS701	Ox	白云岩	0.709 77	±0.000 02	K19	Of	白云岩	0.709 33	±0.000 04
BS701	Ox	灰岩	0.709 7	±0.000 06	K19	Of	灰岩	0.709 25	±0.000 02
BS701	Ox	白云岩	0.709 71	±0.000 02	K24	Of	白云岩	0.710 42	±0.000 03
BS701	Ox	灰岩	0.709 37	±0.000 01	K24	Of	灰岩	0.708 52	±0.000 02
BS701	Ol	白云岩	0.709 51	±0.000 04	K24	Of	灰岩	0.709 34	±0.000 04
BS701	Ol	白云岩	0.709 42	±0.000 05	K24	Of	灰岩	0.709 43	±0.000 04
BS701	Ol	白云岩	0.709 79	±0.000 05	K24	Of	白云岩	0.709 33	±0.000 05
BG1	Ox	灰岩	0.709 09	±0.000 03	LG1	Of	灰岩	0.710 83	±0.000 01
BG1	Ox	白云岩	0.709 27	±0.000 07	LG1	Of	灰岩	0.709 16	±0.000 03
CC1	Of	灰岩	0.708 39	±0.000 01	YG1	Ox	灰岩	0.709 23	±0.000 04
CC1	Of	灰岩	0.708 91	±0.000 02	T12	Of	灰岩	0.708 87	±0.000 03
CC1	Ox	灰岩	0.708 75	±0.000 03	T13	Of	灰岩	0.710 02	±0.000 04
CG1	Of	灰岩	0.708 91	±0.000 07	T13	Of	白云岩	0.709 54	±0.000 03
CH1	Of	灰岩	0.708 9	±0.000 08	T14	Of	灰岩	0.709 33	±0.000 05
CH1	Os	灰岩	0.709 28	±0.000 03	T14	Of	白云岩	0.709 92	±0.000 02
CH1	Os	白云岩	0.709 33	±0.000 07	T15	Of	灰岩	0.709 34	±0.000 03
CH1	Os	灰岩	0.709 46	±0.000 06	T4	Of	灰岩	0.709 88	±0.000 02
CH1	Of	白云岩	0.709 14	±0.000 08	WG1	Of	灰岩	0.709 26	±0.000 02
G2035	Ol	灰岩	0.709 77	±0.000 06	WG1	Of	灰岩	0.710 13	±0.000 01
G2035	Ol	灰岩	0.709 37	±0.000 05	WG1	Of	白云岩	0.710 81	±0.000 03
G2035	Ol	灰岩	0.709 53	±0.000 04	X12	Of	白云岩	0.709 98	±0.000 02
GG4-1	Of	灰岩	0.709 33	±0.000 04	X12	Of	白云岩	0.709 80	±0.000 06
KG1	Of	白云岩	0.709 13	±0.000 07	X12	Of	白云岩	0.709 40	±0.000 04
KG7	Os	白云岩	0.709 81	±0.000 02	X12	Of	灰岩	0.708 94	±0.00001
KG7	Os	白云岩	0.709 61	±0.000 03	X12	Of	白云岩	0.710 38	±0.000 03
KG7	Os	白云岩	0.709 25	±0.000 02	X14	Of	灰岩	0.708 76	±0.000 01
KG7	Os	灰岩	0.709 36	±0.000 05	X14	Of	灰岩	0.708 88	±0.000 04
KG7	Os	灰岩	0.709 45	±0.000 06	X14	Of	灰岩	0.709 14	±0.000 02
ZG2	Os	灰岩	0.708 94	±0.000 06	X7	Of	灰岩	0.709 58	±0.000 02
ZG2	Os	白云岩	0.709 30	±0.000 01	X7	Of	白云岩	0.709 44	±0.000 03
X13	Of	白云岩	0.708 48	±0.000 05	QG1	Of	白云岩	0.708 93	±0.000 04
X13	Of	白云岩	0.708 84	±0.000 06	QG1	Of	白云岩	0.709 01	±0.000 04
X13	Of	白云岩	0.708 98	±0.000 03	QG1	Of	灰岩	0.709 30	±0.000 03
X13	Of	灰岩	0.708 57	±0.000 06

层位	岩性	⁸⁷Sr/⁸⁶Sr范围	⁸⁷Sr/⁸⁶Sr平均值
峰峰组	灰岩	0.708 39~0.710 83	0.709 21
峰峰组	白云岩	0.708 48~0.710 81	0.709 46
上马家沟组	灰岩	0.708 94~0.709 46	0.709 27
上马家沟组	白云岩	0.709 25~0.710 98	0.709 48
下马家沟组	灰岩	0.708 75~0.709 70	0.709 26
下马家沟组	白云岩	0.709 27~0.709 88	0.709 61
亮甲山组	灰岩	0.709 37~0.709 77	0.709 56
亮甲山组	白云岩	0.709 42~0.709 79	0.709 59

层位	岩性	⁸⁷Sr/⁸⁶Sr范围	⁸⁷Sr/⁸⁶Sr平均值
峰峰组	灰岩	0.708 39~0.710 83	0.709 21
峰峰组	白云岩	0.708 48~0.710 81	0.709 46
上马家沟组	灰岩	0.708 94~0.709 46	0.709 27
上马家沟组	白云岩	0.709 25~0.710 98	0.709 48
下马家沟组	灰岩	0.708 75~0.709 70	0.709 26
下马家沟组	白云岩	0.709 27~0.709 88	0.709 61
亮甲山组	灰岩	0.709 37~0.709 77	0.709 56
亮甲山组	白云岩	0.709 42~0.709 79	0.709 59