Mineral Composition and Pore Characteristics of Unconventional Carbonate Reservoir, Diyab Formation in Western UAE
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摘要: 采用X射线衍射、薄片-扫描电镜观察以及特殊岩芯实验分析等技术手段，对阿联酋西部页岩气层系Diyab 组的91 个钻井取芯样品进行了定性以及定量研究。结果表明：研究区Diyab 组矿物组成以方解石为主，含量介于30%~98.3%之间，平均含量86.5%，其次为黏土矿物（6.6%），另含有白云石（2.2%）、铁白云石（1.1%）、石英（2.2%）、黄铁矿（1.3%）等次要矿物；地层中整体碳酸岩盐矿物含量高，脆性强（平均93.2%）；该套地层发育有机质孔、粒间孔、粒内孔、溶蚀孔及裂缝等多种储集结构类型，其中有机孔、矿物颗粒之间的粒间孔构成了孔隙结构的主体；储层物性测试及压汞实验揭示地层有效孔隙度在0.3%~8.4%之间，平均2%，渗透率为1.4×10-4 ~ 1.7×10-4 mD，孔喉中值半径0.012 ~ 0.015 μm，属于纳米孔级别，地层中值排替压力为21580 ~ 22338 psi，岩石整体致密坚硬。本次研究为后续深化该套地层的潜力评价和开展同类地层研究奠定了基础。Abstract: Through the methods of X-Ray diffraction (XRD), thin-section & scanning electron microscope observation, tight reservoir analysis (TRA) and mercury injection capillary pressure (MICP) testing, qualitative and quantitative study was carried out on the 91 samples taken from Diyab Formation, the most prospective unconventional gas reservoir of Western UAE. The results show that the mineral composition of Diyab Formation is predominated by calcite, ranging from 30% to 98.3%, with an average of 86.5%, followed by clay minerals of about 6.6% and minor minerals such as dolomite (2.2%), ankerite (1.1%), quartz (2.2%) and pyrite (1.3%). Generally, this formation shows high content of carbonate minerals and are strongly brittle (about 93.2% on average). The set of formations develops various types of reservoir structures such as organic matter-hosted pores, inter-particle pores, intra-particle pores, dissolution pores and a few cracks among which the organic matter-hosted pores and inter-particle pores are predominated. Tests of TRA and MICP indicate that the effective porosity of Diyab Formation is in the range of 0.3%-8.4% with an average of 2%, the pressure decay permeability yields (1.4-1.7)×10-4 mD and the pore throat radius is around 0.012 -0.015 μm, which are nano-pores. The medium Hg injection pressure is 21580-22338 psi. From the data above, it is concluded that the Diyab Formation is generally dense and hard. This study has laid the foundation for further evaluation of the potential of this formation and the future exploration of similar strata.
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Key words:
- shale-gas reservoir /
- mineral composition /
- pore characteristics /
- Diyab Formation /
- Western UAE
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[1] 曹东升,曾联波,吕文雅,徐翔,田鹤.2021.非常规油气储层脆性评价与预测方法研究进展[J].石油科学通报,6(1): 31-45.
[2] 陈林, 陈孝红, 张保民, 张国涛, 李海, 吕嵘, 陆永潮, 林卫兵.2020.鄂西宜昌地区五峰组-龙马溪组页岩储层特征及其脆性评价[J].地质科技通报,39(2):54-61.
[3] 陈尚斌,朱炎铭,王红岩,刘洪林,魏伟,方俊华.2011.四川盆地南缘下志留统龙马溪组页岩气储层矿物成分特征及意义[J].石油学报,32(5):775-782.
[4] 陈文玲,周文,罗平,邓虎成,李沁,单蕊,戚明辉.2013.四川盆地长芯1 井下志留统龙马溪组页岩气储层特征研究[J].岩石学报,29(3):1073-1086.
[5] 陈孝红,张国涛,胡亚.2016.鄂西宜昌地区埃迪卡拉系陡山沱组页岩沉积环境及其页岩气地质意义[J].华南地质与矿产,32(2):106-116.
[6] 高琳.2016.阿联酋油气资源潜力研究[D].中国石油大学(北京)硕士学位论文.
[7] 计智锋,穆龙新,万仑坤,温志新,王兆明,刘小兵,梁英波,马锋.2019.近10 年全球油气勘探特点与未来发展趋势[J].国际石油经济,27(3):16-22.
[8] 焦淑静,张慧,薛东川.2016.泥页岩样品自然断面与氩离子抛光扫描电镜制样方法的比较与应用[J].电子显微学报,35(6):544-549.
[9] 李娟,于炳松,张金川,李玉喜,武景淑.2012.黔北地区下寒武统黑色页岩储层特征及其影响因素[J].石油与天然气地质,33(3):364-374.
[10] 梁霄,马韶光,李郭琴,夏国勇,刘若林,倪根生,张梦琳,寇一龙,袁翠平,陈佳.2022.上斜坡区筇竹寺组沉积环境及其页岩气勘探潜力:以四川盆地威远地区威207 井为例[J].地质科技通报,41(5):68-82.
[11] 刘友祥,俞凌杰,张庆珍,鲍芳,卢龙飞.2015.川东南龙马溪组页岩的矿物组成与微观储集特征研究[J].石油实验地质,37(3):328-333.
[12] 马文辛,刘树根,黄文明,曾祥亮,张长俊,王佳.2012.四川盆地周缘筇竹寺组泥页岩储层特征[J].成都理工大学学报(自然科学版),39(2):182-189.
[13] 田巍,陈孝红,李旭兵,岳勇,李海,刘安.2021.湘中涟源凹陷下石炭统天鹅坪组页岩气成藏条件及主控因素[J].地质科技通报,40(5):54-63.
[14] 王登, 冷双梁, 陈威, 刘红亮, 吴龙, 周向辉, 余江浩, 居字龙.2021.湖北京山地区孤峰组页岩气地质条件及远景区划分[J].华南地质,37(2):193-204.
[15] 王红岩,施振生,孙莎莎,张磊夫.2021.四川盆地及周缘志留系龙马溪组一段深层页岩储层特征及其成因[J].石油与天然气地质,42(1):66-75.
[16] 王强,白云山,苗凤彬.2016.湖南涟源凹陷下石炭统测水组泥页岩矿物组分与脆性特征研究[J].华南地质与矿产,32(2):166-171.
[17] 王羽,金婵,姜政,汪丽华,王建强,王彦飞,普洁.2016.渝东五峰组-龙马溪组页岩矿物成分与孔隙特征分析[J].矿物学报,36(4):555-562.
[18] 于庭,巴晶,钱卫,郭梦秋,王恩江,张琳,檀文慧.2019.非常规油气储层脆性评价方法研究进展[J].地球物理学进展,34(1):236-243.
[19] 原园,姜振学,喻宸,郭天旭,申玉山,赵若彤.2015.柴北缘中侏罗统湖相泥页岩储层矿物组成与脆性特征[J].高校地质学报,21(1):117-123.
[20] 张吉振,李贤庆,王刚,杨杰,王元,徐红卫,樊志伟.2016.四川盆地南部上二叠统龙潭组页岩气储集层矿物组成特征及意义[J].矿物岩石地球化学通报,35(5):957-965.
[21] 张云鹏,李玉宏,郭望,韩伟,李永红,王伟超.2021.柴达木盆地北缘侏罗系陆相低熟页岩孔隙发育特征及主控因素[J].地质学报,2021,95(2):565-577.
[22] 周庆凡.2019.美国页岩气产量前景展望[J].石油与天然气地质,2019,40(5):944.
[23] 邹才能,杨智,朱如凯,张国生,侯连华,吴松涛,陶士振,袁选俊,董大忠,王玉满,王岚,黄金亮,王淑芳.2015.中国非常规油气勘探开发与理论技术进展[J].地质学报,89(6):979-1007.
[24] Alsharhan A S, Nairn A E M. 2003. Sedimentary basins and petroleum geology of the middle east [M]. Elsevier Science B.V.
[25] Jarvie D M, Hill R J, Ruble T E, Pollastro R M. 2007. Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J]. AAPG Bulletin, 91(4): 475-499.
[26] Loucks R, Ruppel S. 2007. Mississippian Barnett Shale:Lithofacies and depositional setting of a deep-water shale-gas succession in the Fort Worth Basin, Texas [J]. AAPG Bulletin, 91: 579-601.
[27] Loucks R G, Reed R M, Ruppel S C, Hammes U. 2012. Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores [J]. AAPG Bulletin, 96(6): 1071-1098.
[28] Newby W, Abbassi S, Fialips C, D. M. Gauthier B, Padin A, Pourpak H, Taubert S. 2019. Integrated Reservoir Characterisation of an Emerging Unconventional Resource Play in the UAE [C]. Abu Dhabi International Petroleum Exhibition & Conference.
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