埃及西沙漠盆地中生界烃源岩特征及剩余资源分布

doi:10.11743/ogg20200218

Abstract

Abstract:

The West Desert Basin is one of the three major hydrocarbon-bearing areas in Egypt, with a large number of oil and gas fields discovered therein.At the middle stage of exploration and discovery now, the risk of preliminary prospecting increases.The study focuses on the quantitative analysis of remaining resource potential by basin numerical simulation technology following the detailed evaluation of geochemical characteristics of the source rocks.The results show that the dark shale of coal measures in the Safa and Zahra members of the Middle Jurassic Khatatba Fm and that of the AR-F member in the Upper Cretaceous Abu Roash Fm are the three sets of major source rocks in the basin; and the source rocks are widely distributed in each depression with the thickness varying greatly.The source rocks in the Khatatba Fm have a TOC content ranging from 0.5% to 10% and a high content of cracked hydrocarbon S₂, thus are fair-to-very good source rocks.While the AR-F source rocks in the Abu Roash Fm have a TOC content varying between 0.5% and 3% and a moderate-to-high content of cracked hydrocarbon S₂, thus belong to fair-to-good source rocks.The kerogen of these source rocks is dominated by mixed Type II, followed by Type III and minor Type I.It is pointed out that the two sets of source rocks in the Khatatba Fm within the whole basin are at the thermal evolution stage of hydrocarbon generation and expulsion in a large amount; that in the center of the depression reaches high mature stage and even over mature stage locally, with oil and gas co-generated.As for the AR-F section of the Abu Roash Fm, only the source rocks in Abu Gharadig and Natrun Sags enter the mature stage of hydrocarbon generation.It is suggested that the hydrocarbons in the northern part of the basin are mainly contributed by the source rocks of the Jurassic Khatatba Fm, while those in the southeastern part are supplied by source rocks in both the Jurassic Khatatba Fm and the Cretaceous AR-F section.The calculation shows that the remaining volume of recoverable resources in the basin reaches up to 6.51 x 108t, indicating huge resource potential.The Paleozoic, Jurassic and Lower Cretaceous AEB in the Abu Gharadig Sag in the south, and the Paleozoic in the Matruh Sag and the Upper Cretaceous in the Faghur Sag in the north, are low in exploration maturity and high in remaining resource potential, thus being favorable targets for future exploration.

Key words: numerical simulation, remaining resource, potential exploration target, evaluation of source rocks, Western Desert Basin, Egypt

CLC Number:

TE122.1

Xiaolan Yang. Geochemical characteristics of the Mesozoic source rocks and the remaining resources in the Western Desert Basin, Egypt[J]. Oil & Gas Geology, 2020, 41(2): 423-433.

Figures/Tables 10

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References 34

1	IHS Energy Group.International petroleum exploration and production database.Englewood, Colorado, 2017.
2	Gazzar A M E , Moustafa A R , Bentham P . Structural evolution of the Abu Gharadig field area, Northern Western Desert, Egypt[J]. Journal of African Earth Sciences, 2016, 124, 340- 354.
3	Beialy S Y E , Atfy H S E , Zavada M S , et al. Palynological, palynofacies, paleoenvironmental and organic geochemical studies on the Upper Cretaceous succession of the GPTSW-7 well, North Western Desert, Egypt[J]. Marine and Petroleum Geology, 2010, 27 (2): 370- 385.
4	Shalaby M R , Hakimi M H , Abdullah W H . Organic geochemical characteristics and interpreted depositional environment of the Khatatba Formation, northern Western Desert, Egypt[J]. AAPG Bulletin, 2012, 96 (11): 2019- 2036.
5	Zobaa M K , Oboh-Ikuenobe F E , Ibrahim M I . The Cenomanian/Turonian oceanic anoxic event in the Razzak Field, north Western Desert, Egypt:Source rock potential and paleo environmental association[J]. Marine and Petroleum Geology, 2011, 28, 1475- 1482.
6	孟元林, 申婉琪, 周新桂, 等. 东部盆地群下白垩统烃源岩特征与页岩气勘探潜力[J]. 石油与天然气地质, 2016, 36 (6): 893- 902.
	Meng Yuanlin , Shen Wanqi , Zhou Xingui , et al. Characteristics of the Lower Cretaceous source rocks and shale gas exploration potential of eastern basin group, NE China[J]. OIL & GAS GEOLOGY, 2016, 36 (6): 893- 902.
7	Shalaby M R , Hakimi M H , Wan H A . Geochemical characteristics and hydrocarbon generation modeling of the Jurassic source rocks in the Shushan Basin, north Western Desert, Egypt[J]. Marine and Petroleum Geology, 2011, 28, 1611- 1624.
8	蔡希源. 湖相烃源岩生排烃机制及生排烃效率差异性——以渤海湾盆地东营凹陷为例[J]. 石油与天然气地质, 2012, 33 (3): 329- 345.
	Cai Xiyuan . The mechanism of hydrocarbon generation and expulsion and the difference of hydrocarbon generation and expulsion efficiency of lacustrine source rocks:A case study of Dongying Sag, Bohai Bay Basin[J]. Petroleum and Natural Gas Geology, 2012, 33 (3): 329- 345.
9	罗胜元, 陈孝红, 刘安, 李海. 中扬子宜昌地区下寒武统水井沱组页岩气地球化学特征及其成因[J]. 石油与天然气地质, 2019, 40 (5): 999- 1010.
	Luo Shengyuan , Chen Xiaohong , Liu An , Li Hai . Geochemical features and genesis of shale gas from the Lower Cambrian Shuijingtuo Formation shale in Yichang block, Middle Yangtze region[J]. Oil & Gas Geology, 2019, 40 (5): 999- 1010.
10	申宝剑, 秦建中, 冯丹, 等. 烃源岩有机碳含量与生排油效率动态评价[J]. 石油实验地质, 2017, 39 (4): 505- 510.
	Shen Baojian , Qin Jianzhong , Feng Dan , et al. Dynamic evaluation of organic carbon content and oil production and discharge efficiency of source rocks[J]. Petroleum experimental geology, 2017, 39 (4): 505- 510.
11	胡朝元. 生油区控制油气田分布:中国东部陆相盆地进行区域勘探的有效理论[J]. 石油学报, 1982, 3 (2): 9- 13.
	Hu Chaoyuan . Source bed controls hydrocarbon habitat in continental basins, east China[J]. Acta Petrolei Sinica, 1982, 3 (2): 9- 13.
12	胡见义, 徐树宝, 童晓光. 渤海湾盆地复式油气聚集区(带)的形成和分布[J]. 石油勘探与开发, 1986, 13 (1): 1- 8.
	Hu Jianyi , Xu Shubao , Tong Xiaoguang . Formation and distribution of complex petroleum accumulation zones in Bohaiwan Basin[J]. Petroleum Exploration and Development, 1986, 13 (1): 1- 8.
13	赵文智, 邹才能, 汪泽成, 等. 富油气凹陷"满凹含油"论:内涵与意义[J]. 石油勘探与开发, 2004, 31 (2): 130- 142.
	Zhao Wenzhi , Zou Caineng , Wang Zecheng , et al. The intension and signification of "sag-wide oil-bearing theory" in the hydrocarbon-rich depression with terrestrial origin[J]. Petroleum Exploration and Development, 2004, 31 (2): 130- 142.
14	康洪全, 逄林安, 贾怀存, 等. 澳大利亚西北陆架北卡那封盆地资源潜力评价[J]. 石油实验地质, 2018, 40 (6): 808- 817.
	Kang Hongquan , Lilin'an , Jia Huaihuai , et al. Resource Potential Assessment of NorthCARNAVON Basin on the Northwest Shelf of Australia[J]. Petroleum Experimental Geology, 2018, 40 (6): 808- 817.
15	高辉, 何梦卿, 赵鹏云, 等. 鄂尔多斯长7页岩油与北美地区典型页岩油地质特征对比[J]. 石油实验地质, 2018, 40 (2): 133- 140.
	Gao Hui , He Mengqing , Zhao Pengyun , et al. Comparison of geological characteristics of Chang 7 shale oil in Ordos Basin and typical shale oil in North America[J]. Petroleum Geology & Experiment, 2018, 40 (2): 133- 140.
16	周志,翟刚毅,石砥石,等.鄂西-渝东北地区五峰组-龙马溪组页岩气成藏地质条件分析[J],石油实验地质, 2019, 41(1):1-9.
	Zhou Zhi, Zhai Gangyi, Shizhanshi, et al.[J], Petroleum Experimental Geology, 2019, 41(1): 1-9.
17	朱如凯,邹才能,吴松涛,杨智,毛治国,杨海波,范春怡,惠潇,崔景伟,苏玲,王焕第.中国陆相致密油形成机理与富集规律[J].石油与天然气地质, 2019, 40(6): 1168-1184.
	Zhu Rukai, Zou Caineng, Wu Songtao,, et al.[J], Mechanism for generation and accumulation of continental tight oil in China[J]. Oil & Gas Geology, 2019, 40(6): 1168-1184.
18	梁刚, 甘军, 李兴, 等. 琼东南盆地浅水区与深水区烃源岩热演化差异性影响因素研究[J]. 特种油气藏, 2019, 26 (1): 69- 74.
	Liang Gang , Gan Jun , Li Xing , et al. Influential factors of thermal evolution difference of source rocks in shallow and deep water areas of Southeastern Hainan Basin[J]. Special Oil & Gas Reservoirs, 2019, 26 (1): 69- 74.
19	刘玉瑞. 苏北盆地与南黄海盆地中-新生界成烃对比浅析[J]. 石油实验地质, 2010, 32 (6): 541- 546.
	Liu Yurui . Comparison analysis of Meso-Cenozoic hydrocarbon generation between the North Jiangsu basin and the South Yellow Sea basin[J]. Petroleum Geology & Experiment, 2010, 32 (6): 541- 546.
20	范柏江, 庞雄奇, 师良. 烃源岩排烃门限在生排油气作用中的应用[J]. 西南石油大学学报(自然科学版), 2012, 34 (5): 65- 70.
	Fan Bojiang , Pang Xiongqi , Shi Liang . Application of Hydrocarbon Expulsion Threshold in Studying the Hydrocarbon Generation and Expulsion[J]. Journal of Southwest Petroleum University:Science & Technology Edition, 2012, 34 (5): 65- 70.
21	郑见超, 李斌, 刘羿伶, 等. 塔里木盆地下寒武统玉尔吐斯组烃源岩热演化模拟分析[J]. 油气藏评价与开发, 2018, 8 (6): 7- 12.
	Zheng Jianchao , Li Bin , Liu Yiling , et al. Study on thermal evolution modeling of lower Cambrian Yuertusi source rock, Tarim Basin[J]. Reservoir Evaluation and Development, 2018, 8 (6): 7- 12.
22	Rossi C , Goldstein R H , Ceriani A , et al. Fluid inclusions record thermal and ffluid evolution in reservoir sandstones, Khatatba Formation, Western Desert, Egypt:A case for ffluid injection[J]. AAPG Bulletin, 2002, 86 (10): 1773- 1799.
23	Moretti I , Kerdraon Y , Rodrigo G , et al. South Alamein petroleum system (Western Desert, Egypt[J]. Petroleum Geoscience, 2010, 16, 121- 131.
24	Metwalli F I , Pigott J D . Analysis of petroleum system criticals of the Matruh-Shushan Basin, Western Desert, Egypt[J]. Petroleum Geoscience, 2005, 11, 157- 178.
25	Awad G M . Habitat of Oil in Abu Gharadig and Faiyum Basins, Western Desert, Egypt[J]. AAPG Bulletin, 1984, 68 (5): 564- 573.
26	Younes M A.Burial History and Hydrocarbon Generation Modeling of the Jurassic-Cretaceous Formations in the Alamein-Shushan Basins, Northern Western Desert of Egypt.AAPG, 2012.
27	庞雄奇, 陈章明, 陈发景. 含油气盆地地史、热史、生留排烃史数值模拟研究与烃源岩定量评价[M]. 北京: 地质出版社, 1993.
	Pang Xiongqi , Chen Zhangming , Chen Fajing . Study on Numerical Simulation of geohistory, thermal history and hydrocarbon generation and expulsion history of petroliferous basins and quantitative evaluation of hydrocarbon source rocks[M]. Beijing: Geological Press, 1993.
28	The Egyptian general petroleum corporation.Western Desert, oil and gas fields(A Comprehensive Overview)[M]. 1992.
29	Said R.The geology of Egypt[M]. The Egyptian General Petroleum Corporation, Conoco Hurghada Inc.and Repsol Exploracion, 1990.
30	贾怀存. 全球大油气田勘探进展及勘探启示[J]. 科技导报, 2014, 32 (8): 76- 83.
	Jia Huaiyun . Exploration Progress and Exploration Enlightenment of Global Large Oil and Gas Fields[J]. Science and Technology Report, 2014, 32 (8): 76- 83.
31	田纳新, 殷进垠, 陶崇智, 等. 中东-中亚地区重点盆地油气地质特征及资源评价[J]. 石油与天然气地质, 2017, 38 (3): 582- 591.
	Tian Naxin , Yin Jinyuan , Tao Chongzhi , et al. Petroleum geologic characteristics and resource evaluation of key basins in the Middle East-Central Asia region[J]. Petroleum and natural gas geology, 2017, 38 (3): 582- 591.
32	张鹏, 张金功, 张亮, 等. 济阳坳陷渤南洼陷沙河街组二段多源供烃成藏模式[J]. 石油实验地质, 2018, 40 (2): 159- 167.
	Zhang Peng , Zhang Jingong , Zhang Liang , et al. Multi-source hydrocarbon supply and accumulation model of the second member of Shahejie Formation in Bonan Depression, Jiyang Depression[J]. Petroleum experimental geology, 2018, 40 (2): 159- 167.
33	徐田武, 张成富, 吕立爽, 等. 形成规模油田成烃要素下限探讨——以东濮凹陷马寨油田为例[J]. 断块油气田, 2019, 26 (02): 137- 141.
	Xu Tianwu , Zhang Chengfu , Lyu Lishuang , et al. Lower limit discussion of hydrocarbon generation factor for large scale oilfield:taking Mazhai Oilfield of Dongpu Depression as an example[J]. Fault-Block Oil and Gas Field, 2019, 26 (02): 137- 141.
34	孙同文, 高喜成, 吕延防, 付广, 王海学, 王浩然. 断裂转换带作为油气侧向、垂向运移通道的研究进展[J]. 石油与天然气地质, 2019, 40 (5): 1011- 1021.
	Sun Tongwen , Gao Xicheng , Lyu Yanfang , Fu Guang , Wang Haixue , Wang Haoran . Research progress in fault transformation zones as lateral or vertical hydrocarbon migration pathways[J]. Oil & Gas Geology, 2019, 40 (5): 1011- 1021.

地层		Faghur凹陷		Ghazalat凹陷		Shushan凹陷		Matruh凹陷
地层		范围	平均	范围	平均	范围	平均	范围	平均
新生界		24.9~32.8	28.9	24.1~29.5	26.8	33.9~34.4	34.2	31.5~32.8	32.2
中生界	上白垩统	29.3~39.4	34.4	29.0~32.8	30.9	35.0~39.4	37.2	36.6~41.5	39.1
	下白垩统	23.0~28.9	26.0	24.1~27.1	25.6	30.3~34.3	32.3	31.3~35.3	33.3
	侏罗系	23.0~29.1	26.1	24.9~26.7	25.8	29.8~30.0	29.9	30.8~31.4	31.1
古生界		24.0~28.6	26.3	24.2~24.8	24.5	29.1~29.5	29.3	30.9~31.2	31.1

层位	剩余可采资源量/10⁸ t	所占百分比/%	主要分布领域
Abu Roash	0.65	8	Abu Gharadig凹陷
Bahariya	0.90	11	Faghur凹陷、Matruh凹陷、Abu Gharadig凹陷、
Kharita	0.18	2	Shushan凹陷、Matruh凹陷
Alamein	0.18	2	Alamein凹陷、Matruh凹陷
AEB	1.28	16	Abu Gharadig凹陷、Matruh凹陷、Faghur凹陷
侏罗系	1.97	24	Shushan凹陷、Matruh凹陷、Faghur凹陷
古生界	2.99	37	Matruh凹陷、Shushan凹陷和Abu Gharadig凹陷、Qattara隆起
合计	8.15	100

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Geochemical characteristics of the Mesozoic source rocks and the remaining resources in the Western Desert Basin, Egypt

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