Fluid alteration mechanism of dolomite reservoirs in Dengying Formation, South China

doi:10.7623/syxb201510002

Acta Petrolei Sinica ›› 2015, Vol. 36 ›› Issue (10): 1188-1198.DOI: 10.7623/syxb201510002

• Petroleum Exploration • Previous Articles Next Articles

Fluid alteration mechanism of dolomite reservoirs in Dengying Formation, South China

Zhu Dongya, Zhang Dianwei, Zhang Rongqiang, Feng Jufang, He Zhiliang

Sinopec Exploration & Production Research Institute, Beijing 100083, China

Received:2015-04-07 Revised:2015-08-06 Online:2015-10-25 Published:2015-11-09

中国南方地区灯影组白云岩储层流体溶蚀改造机制

朱东亚, 张殿伟, 张荣强, 冯菊芳, 何治亮

中国石油化工股份有限公司石油勘探开发研究院北京 100083

通讯作者: 朱东亚,男,1975年10月生,1998年获中国地质大学(武汉)石油与天然气地质勘探专业学士学位,2005年获南京大学矿物学、岩石学、矿床学专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事流体作用和碳酸盐岩油气成藏方面的研究。Email:zhudy.syky@sinopec.com
作者简介:朱东亚,男,1975年10月生,1998年获中国地质大学(武汉)石油与天然气地质勘探专业学士学位,2005年获南京大学矿物学、岩石学、矿床学专业博士学位,现为中国石油化工股份有限公司石油勘探开发研究院高级工程师,主要从事流体作用和碳酸盐岩油气成藏方面的研究。Email:zhudy.syky@sinopec.com
基金资助:
国家自然科学基金项目(No.41230312,No.41372149)、国家重点基础研究发展计划(973)项目(2012CB214802)和国家重大科技专项(2011ZX05005-002)资助。

Abstract

Abstract:

The analyses were carried out on carbon, oxygen and strontium isotopes and rare earth elements (REEs) of the unaltered muddy-micritic dolomites, pore-rich dolomite reservoirs altered by corrosion (including coarse crystalline sucrosic dolomite) and pore-filling coarse crystalline dolomites in Sinian Dengying Formation of the southern China, so as to identify the type, process and mechanism of fluid alternation in the development process of dolomite reservoirs. The average values of δ¹³C, δ¹⁸O and ⁸⁷Sr/⁸⁶Sr of unaltered dolomites are 3.0‰, -3.5‰ and 0.708 779 respectively. There is no significant Ce and Eu anomaly in REE composition, indicating normal dolomites formed by the action of seawater. The average values of δ¹³C, δ¹⁸O and ⁸⁷Sr/⁸⁶Sr of altered sucrosic dolomites are 1.7‰, -7.7‰ and 0.709579 respectively. The carbon and oxygen isotope compositions are slightly lighter and ⁸⁷Sr/⁸⁶Sr ratio is higher than unaltered dolomites. Moreover, altered dolomites have higher REE content and significant negative Ce anomaly (δCe average = 0.5). It is proven that pore-rich sucrosic dolomite reservoirs are the products of meteoric water and oil-bearing fluid alteration. The average values of δ¹³C, δ¹⁸O and ⁸⁷Sr/⁸⁶Sr of pore-filling coarse crystalline dolomites are 0.3‰, -11.3‰ and 0.710 334 respectively. The carbon and oxygen isotope compositions are significantly lighter, while ⁸⁷Sr/⁸⁶Sr ratio is markedly higher. Meanwhile, there is significant positive Eu anomaly (δEu average = 3.0, maximum δEu = 9.8). It is demonstrated that pore-filling dolomites were precipitated from hydrothermal fluids and affected by organically generated stratigraphic fluids.Based on the identified fluid types and geological evolution background, the fluid alteration process and mechanism of dolomite reservoirs in Dengying Formation were discussed in this study. Muddy-micritic dolomite sediments with seawater platform facies were developed in Sinian Dengying Formation of the southern China, where laminar algal structure was shown in some zones. At the end of Sinian period, the dolomites in Dengying Formation were altered by meteoric water, and then infiltrated to deep subsurface, promoting dolomite dissolution and recrystallization. In the subsequent burial process, these dolomites further underwent the dissolution and alteration of oil-bearing fluids. As a result, coarse crystalline dolomite reservoirs were formed rich in dissolution pores and bitumen. Due to alteration of hydrothermal fluids in the burial process, pores were filled by dolomites, leading to densification of dolomite reservoirs to a certain extent.

Key words: Denying Formation, dolomite, dissolution, isotope, rare earth element

摘要：

对南方地区震旦系灯影组未遭受溶蚀改造作用的泥粉晶白云岩、遭受溶蚀改造的富含溶蚀孔隙白云岩储层(包括粗晶砂糖状白云岩)以及孔洞中充填的粗晶白云石开展了碳、氧和锶同位素以及稀土元素分析,以判别白云岩储层发育经历的流体改造作用类型、过程和机制。未溶蚀白云岩的δ¹³C、δ¹⁸O和⁸⁷Sr/⁸⁶Sr比值平均分别为3.0‰、-3.5‰ 和0.708 779;稀土元素组成上无显著的Ce和Eu异常,属于正常的海水成因白云岩。溶蚀改造后的砂糖状白云岩的δ¹³C、δ¹⁸O和⁸⁷Sr/⁸⁶Sr比值平均分别为1.7‰、-7.7‰ 和0.709 579,与未溶蚀改造白云岩相比具有略偏轻的碳、氧同位素组成和较高的⁸⁷Sr/⁸⁶Sr比值;稀土元素组成上,具有较高的REE含量和显著的Ce负异常,δCe平均值为0.5,表明多孔的砂糖状白云岩储层是大气降水和含油气流体溶蚀改造的产物。孔洞中充填的粗晶白云石的δ¹³C、δ¹⁸O和⁸⁷Sr/⁸⁶Sr比值平均分别为0.3‰、-11.3‰ 和0.710 334,具有显著偏轻的碳、氧同位素组成和显著高的⁸⁷Sr/⁸⁶Sr比值;稀土元素组成上,具有显著的Eu正异常,δEu平均值为3.0,最大达到9.8,表明孔隙充填白云石是从热液流体中沉淀出来的,并受地层中有机成因流体的影响。根据所确定流体作用类型并结合构造地质演化背景,探讨了灯影组白云岩储层流体改造过程和机制。南方地区在震旦纪灯影组沉积时期发育海水台地相泥粉晶白云岩沉积,局部见藻纹层结构。震旦纪末期遭受大气降水溶蚀改造,下渗至地下深处,促使白云岩溶蚀和重结晶作用;在此后的埋藏过程中,进一步遭受含油气流体的溶蚀改造作用,最终形成富含溶蚀孔隙和沥青的中粗晶白云岩储层。埋藏过程中,受盆地深部热液的改造作用,在孔隙中形成白云石充填,使白云岩储层发生了一定程度的致密化作用。

关键词: 灯影组, 白云岩, 溶蚀, 同位素, 稀土元素

CLC Number:

TE122.14

Zhu Dongya, Zhang Dianwei, Zhang Rongqiang, Feng Jufang, He Zhiliang. Fluid alteration mechanism of dolomite reservoirs in Dengying Formation, South China[J]. Acta Petrolei Sinica, 2015, 36(10): 1188-1198.

朱东亚, 张殿伟, 张荣强, 冯菊芳, 何治亮. 中国南方地区灯影组白云岩储层流体溶蚀改造机制[J]. 石油学报, 2015, 36(10): 1188-1198.

References

[1] 金之钧.中国海相碳酸盐岩层系油气勘探特殊性问题[J].地学前缘(中国地质大学(北京); 北京大学),2005,12(3):15-22.
Jin Zhijun.Particularity of petroleum exploration on marine carbonate strata in China sedimentary basins[J].Earth Science Frontiers (China University of Geosciences,Beijing; Peking University),2005,12(3):15-22.
[2] 刘树根,马永生,孙玮,等.四川盆地威远气田和资阳含气区震旦系油气成藏差异性研究[J].地质学报,2008,82(3):328-337.
Liu Shugen,Ma Yongsheng,Sun Wei,et al.Studying on the differences of Sinian nature gas pools between Weiyuan gas field and Ziyang gas-brone area,Sichuan Basin[J].Acta Geologica Sinica,2008,82(3):328-337.
[3] Wei Guoqi,Cheng Gengsheng,Du Shangming,et al.Petroleum systems of the oldest gas field in China:neoproterozoic gas pools in the Weiyuan gas field,Sichuan Basin[J].Marine and Petroleum Geology,2008,25(4/5):371-386.
[4] 黄文明,刘树根,马文辛,等.四川盆地东南缘震旦系下古生界储层特征及形成机制[J].石油天然气学报,2011,33(7):7-12.
Huang Wenming,Liu Shugen,Ma Wenxin,et al.Reservoir characteristics and formation mechanism of Sinian-lower Paleozoic in the Southeastern margin of Sichuan Basin[J].Journal of Oil and Gas Technology,2011,33(7):7-12.
[5] Shi Zejin,Wang Yong,Tian Yaming,et al.Cementation and diagenetic fluid of algal dolomites in the Sinian Dengying Formation in southeastern Sichuan Basin[J].Science China Earth Sciences,2013,56(2):192-202.
[6] Mazzullo S J,Harris P M.Mesogenetic dissolution:its role in porosity development in carbonate reservoirs[J].AAPG Bulletin,1992,76(5):607-620.
[7] Jin Zhijun,Zhu Dongya,Hu Wenxuan,et al.Mesogenetic dissolution of the Middle Ordovician limestone in the Tahe oilfield of Tarim Basin,NW China[J].Marine and Petroleum Geology,2009,26(6):753-763.
[8] Davies G R,Smith L B.Structurally controlled hydrothermal dolomite reservoir facies:an overview [J].AAPG Bulletin,2006,90(11):1641-1690.
[9] 金之钧,朱东亚,胡文瑄,等.塔里木盆地热液活动地质地球化学特征及其对储层影响[J].地质学报,2006,80(2):245-253.
Jin Zhijun,Zhu Dongya,Hu Wenxuan,et al.Geological and geochemical signatures of hydrothermal activity and their influence on carbonate reservoir beds in the Tarim Basin[J].Acta Geologica Sinica,2006,80(2):245-253.
[10] 刘树根,黄文明,陈翠华,等.四川盆地震旦系—古生界热液作用及其成藏成矿效应初探[J].矿物岩石,2008,28(3):41-50.
Liu Shugen,Huang Wenming,Chen Cuihua,et al.Primary study on hydrothermal fluids activities and their effectiveness on petroleum and mineral accumulation of Sinian system-Paleozoic in Sichuan Basin[J]. Journal of Mineralogy and Petrology,2008,28(3):41-50.
[11] 王兴志,穆曙光,方少仙,等.四川盆地西南部震旦系白云岩成岩过程中的孔隙演化[J].沉积学报,2000,18(4):549-554.
Wang Xingzhi,Mu Shuguang,Fang Shaoxian,et al.Evolution of porosity in the process of Sinian dolostone diagenesis in southwest Sichuan[J].Acta Sedimentological Sinica,2000,18(4):549-554.
[12] 翟永红,郭成贤.中扬子台地北缘灯影组碳酸盐岩成岩作用序列及成岩模式[J].地质地球化学,1997,25(2):45-52.
Zhai Yonghong,Guo Chengxian.The carbonate diagenetic model and sequence of the Dengying Formation (upper Sinian) on the northern margin of the middle Yantze platform[J].Geology-Geochemistry,1997,25(2):45-52.
[13] Moore C H.Carbonate reservoirs-porosity evolution and diagenesis in a sequence stratigraphic framework[M].Amsterdam:Elsevier Science,2001:185-244.
[14] Loucks R G,Mescher P K,McMechan G A.Three-dimensional architecture of a coalesced,collapsed-paleocave system in the Lower Ordovician Ellenburger Group,central Texas[J].AAPG Bulletin,2004,88(5):545-564.
[15] 于炳松,樊太亮,黄文辉,等.层序地层格架中岩溶储层发育的预测模型[J].石油学报,2007,28(4):41-45.
Yu Bingsong,Fan Tailiang,Huang Wenhui,et al.Predictive model for karst reservoirs in sequence stratigraphic framework[J].Acta Petrolei Sinica,2007,28(4):41-45.
[16] 李宗银,姜华,汪泽成,等.构造运动对四川盆地震旦系油气成藏的控制作用[J].天然气工业,2014,34(3):23-30.
Li Zongyin,Jiang Hua,Wang Zecheng,et al.Control of tectonic movement on hydrocarbon accumulation in the Sinian strata,Sichuan Basin[J].Natural Gas Industry,2014,34(3):23-30.
[17] 赵宗举,朱琰,邓红婴,等.中国南方古隆起对中、古生界原生油气藏的控制作用[J].石油实验地质,2003,25(1):10-17.
Zhao Zongju,Zhu Yan,Deng Hongying,et al.Control of paleouplifts to the Meso-Paleozoic primary oil and gas pools in the south of China[J].Petroleum Geology and Experiment,2003,25(1):10-17.
[18] 李双建,高波,沃玉进,等.中国南方海相油气藏破坏类型及其时空分布[J].石油实验地质,2011,33(1):43-55.
Li Shuangjian,Gao Bo,Wo Yujin,et al.Destruction types and temporal-spatial distribution of marine hydrocarbon reservoirs in South China[J].Petroleum Geology and Experiment,2011,33(1):43-55.
[19] Warren J.Dolomite:occurrence,evolution and economically important associations[J].Earth-Science Reviews,2000,52(1/3):1-81.
[20] Veizer J,Bruckschen P,Pawellek F,et al.Oxygen isotope evolution of Phanerozoic seawater[J].Palaeogeography,Palaeoclimatology,Palaeoecology,1997,132(1/4):159-172.
[21] Irwin H,Curtis C,Coleman M.Isotopic evidence for source of diagenetic carbonates formed during burial of organic rich sediments[J].Nature,1977,269(5625):209-213.
[22] Cai Chunfang,Li Kaikai,Li Hongtao,et al.Evidence for cross formational hot brine flow from integrated ⁸⁷Sr/⁸⁶Sr,REE and fluid inclusions of the Ordovician veins in Central Tarim,China[J].Applied Geochemistry,2008,23(8):2226-2235.
[23] Vasconcelos C,McKenzie J A,Warthmann R,et al.Calibration of the δ¹⁸O paleothermometer for dolomite precipitated in microbial cultures and natural environments[J].Geology,2005,33(4):317-320.
[24] Winter B L,Johnson C M,Clark D L.Strontium,neodymium,and lead isotope variations of authigenic and silicate sediment components from the Late Cenozoic Arctic Ocean:implications for sediment provenance and the source of trace metals in seawater[J].Geochimica et Cosmochimica Acta,1997,61(19):4181-4200.
[25] Goldstein S J,Jacobsen S B.Rare earth elements in river waters[J].Earth and Planetary Science Letters,1988,89(1):35-47.
[26] 胡文瑄,陈琪,王小林,等.白云岩储层形成演化过程中不同流体作用的稀土元素判别模式[J].石油与天然气地质,2010,31(6):810-818.
Hu Wenxuan,Chen Qi,Wang Xiaolin,et al.REE models for the discrimination of fluids in the formation and evolution of dolomite reservoirs[J].Oil and Gas Geology,2010,31(6):810-818.
[27] 亨德森.稀土元素地球化学[M].北京:地质出版社, 1989:195-213.
Henderson P.Rare Earth element geochemistry[M].Atlanta:Elsevier Science,1983:195-213.
[28] Sverjensky D A.Europium redox equlibria in aqueous solution[J].Earth and Planetary Science Letters,1984,67(1):70-78.
[29] Bau M,Mller P.Rare earth element fractionation in metamorphogenic hydrothermal calcite,magnesite and siderite[J].Mineralogy and Petrology,1992,45(3/4):231-246.
[30] Lüders V,Moller P,Dulskl P.REE fractionation in carbonates and fluorite[C]//Moller P,Lüders V (Eds.),Monograph Series on Mineral Deposits,1993,30:133-150.
[31] Hecht L,Freiberger R,Albert Gilg H,et al.Rare earth element and isotope (C,O,Sr) characteristics of hydrothermal carbonates:genetic implications for dolomite-hosted talc mineralization at Gpfersgrün (Fichtelgebirge,Germany)[J].Chemical Geology,1990,155(1/2):115-130.
[32] Bau M.Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium[J]. Chemical Geology,1991,93(3/4):219-230.
[33] 姚根顺,郝毅,周进高,等.四川盆地震旦系灯影组储层储集空间的形成与演化[J].天然气工业,2014,34(3):31-37.
Yao Genshun,Hao Yi,Zhou Jingao,et al.Formation and evolution of reservoir spaces in the Sinian Dengying Fm of the Sichuan Basin[J].Natural Gas Industry,2014,34(3):31-37.
[34] 邹才能,杜金虎,徐春春,等.四川盆地震旦系-寒武系特大型气田形成分布,资源潜力及勘探发现[J].石油勘探与开发,2014,41(3): 278-293.
Zou Caineng,Du Jinhu,Xu Chunchun,et al.Formation,distribution,resource potential and discovery of the Sinian-Cambrian giant gas field,Sichuan Basin,SW China[J].Petroleum Exploration and Development,2014,41(3):278-293.
[35] 罗冰,杨跃明,罗文军,等.川中古隆起灯影组储层发育控制因素及展布[J].石油学报,2015,36(4):416-426.
Luo Bing,Yang Yueming,Luo Wenjun,et al.Controlling factors and distribution of reservoir development in Dengying Formation of paleo-uplift in central Sichuan Basin[J].Acta Petrolei Sinica,2015,36(4):416-426.
[36] 魏国齐,杜金虎,徐春春,等.四川盆地高石梯—磨溪地区震旦系—寒武系大型气藏特征与聚集模式[J].石油学报,2015,36(1):1-12.
Wei Guoqi,Du Jinhu,Xu Chunchun,et al.Characteristics and accumulation modes of large gas reservoirs in Sinian-Cambrian of Gaoshiti-Moxi region,Sichuan Basin[J].Acta Petrolei Sinica,2015,36(1):1-12.
[37] 杨雨,黄先平,张健,等.四川盆地寒武系沉积前震旦系顶界岩溶地貌特征及其地质意义[J].天然气工业,2014,34(3):38-43.
Yang Yu,Huang Xianpin,Zhang Jian,et al.Features and geologic significances of the top Sinian karst landform before the Cambrian deposition in the Sichuan Basin[J].Natural Gas Industry,2014,34(3):38-43.
[38] Matthews A,Lieberman J,Avigad D,et al.Fluid-rock interaction and thermal evolution during thrusting of an Alpine metamorphic complex (Tinos island,Greece)[J].Contributions to Mineralogy and Petrology,1999,135(2/3):212-224
[39] Morrison J.Meteoric water-rock interaction in the lower plate of the Whipple Mountain metamorphic core complex,California[J].Journal of Metamorphic Geology,2007,12(6):827-840.
[40] Zhu Guangyou,Wang Tongshan,Xie Zengye,et al.Giant gas discovery in the Precambrian deeply buried reservoirs in the Sichuan Basin,China:implications for gas exploration in old cratonic basins[J].Precambrian Research,2015,262:45-66.
[41] 胡安平,Li Maowen,杨春,等.川东北高含硫化氢气藏中储层沥青的特征[J].石油学报,2010,31(2):231-236.
Hu Anping,Li Maowen,Yang Chun,et al.Characteristics of reservoir bitumen in Puguang and Maoba gas fields with high H2S content in north-eastern Sichuan Basin[J].Acta Petrolei Sinica,2010,31(2):231-236.
[42] Hao Fang,Zhang Xuefeng,Wang Cunwu,et al.The fate of CO₂ derived from thermochemical sulfate reduction (TSR) and effect of TSR on carbonate porosity and permeability,Sichuan Basin,China[J].Earth-Science Reviews,2015,141:154-177.
[43] 刘景东,刘光祥,王良书,等.川东北元坝—通南巴地区二叠系—三叠系天然气地球化学特征及成因[J].石油学报,2014,35(3):417-428.
Liu Jingdong,Liu Guangxiang,Wang Liangshu,et al.Geochemical characteristics and origin of Permian and Triassic natural gas in Yuanba-Tongnanba area,northeastern Sichuan Basin[J].Acta Petrolei Sinica,2014,35(3):417-428.

Fluid alteration mechanism of dolomite reservoirs in Dengying Formation, South China

中国南方地区灯影组白云岩储层流体溶蚀改造机制

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Huang Yahao, Wang Rujun, Wen Zhigang, Zhang Yintao, Cui Shiti, Li Mengqin, Wang Peng, He Taohua. Hydrocarbon accumulation process of the deep to ultra deep reservoirs in Fuman oilfield,Tarim Basin [J]. Acta Petrolei Sinica, 2024, 45(6): 947-960.
[2]	Zhu Guangyou, Ai Yifei, Li Tingting, Wang Meng, Chen Weiyan, Zhang Zhiyao, Zhao Kun, Li Xi, Zhang Yan, Duan Pengzhen, Shi Jun. Application of unconventional isotopes in petroleum geology and new progress in petroleum geochemistry [J]. Acta Petrolei Sinica, 2024, 45(4): 718-754.
[3]	Zhu Guangyou, Li Xi. Progress in genetic types and research methods of dolomite [J]. Acta Petrolei Sinica, 2023, 44(7): 1167-1190.
[4]	Sun Lidong, Zhou Xiang, Yang Liang, Zhang Ying, Li Guangwei, Li Guozheng, Xu Jinshuang. Geocheimcal characteristics and accumulation model of deep gas in Yingshan area, Songliao Basin [J]. Acta Petrolei Sinica, 2023, 44(2): 285-298.
[5]	Zhao Dongfang, Tan Xiucheng, Luo Wenjun, Wang Xiaofang, Xu Wei, Luo Sicong, Tang Dahai, Luo Yao, Zeng Wei. Karst characteristics at early diagenetic stage and their enlightenment for the origin of ancient deep carbonate reservoirs: a case study of the Member 4 of Dengying Formation in Moxi 8 well area, central Sichuan [J]. Acta Petrolei Sinica, 2022, 43(9): 1236-1252.
[6]	Shang Ting, Tian Jingchun, Liu Xin, Xie Xiankui, Zhang Xiaolei, Yu Wei, Guo Yixuan, Wang Feng, Chen Jiangmeng. Genesis analysis of the petroleum associated H₂S: a case study of Pengyang oilfield in Ordos Basin [J]. Acta Petrolei Sinica, 2022, 43(5): 595-604.
[7]	Wu Xiaoqi, Zhou Lingfang, Zhao Shanshan, Qian Yixiong, Wang Yanqing, Yang Jun, Wang Dong. Geochemical characteristics of reservoir bitumen from Dengying Formation in Langzhong area of Sichuan Basin and its implication [J]. Acta Petrolei Sinica, 2022, 43(4): 483-493.
[8]	Pan Liyin, Hao Yi, Liang Feng, Hu Anping, Feng Yuexing, Zhao Jianxin. New evidence of laser in-situ U-Pb dating and isotopic geochemistry for the genesis of dolomite reservoir: a case study of dolomite reservoir from Middle Permian Q ixia Formation in northwestern Sichuan Basin [J]. Acta Petrolei Sinica, 2022, 43(2): 223-233.
[9]	Li Xi, Zhu Guangyou, Li Tingting, Zhou Lei, Wu Yuxuan, Tian Lianjie. Mg isotopic characteristics and genetic mechanism of dolomite of Cambrian Xixiangchi Formation in central Sichuan Basin [J]. Acta Petrolei Sinica, 2022, 43(11): 1585-1603.
[10]	Bai Ying, Li Jianzhong, Liu Wei, Xu Zhaohui, Xu Wanglin, Li Xin, Abitkazy Taskyn. Characteristics and multiple dolomitization mode of the Lower Cambrian dolomite reservoir, northwestern Tarim Basin [J]. Acta Petrolei Sinica, 2021, 42(9): 1174-1191.
[11]	Luo Tao, Guo Xiaowen, Shu Zhiguo, Bao Hanyong, He Sheng, Qing Zejian, Xiao Zhihui. Fluid source and formation time of fracture veins of Wufeng Formation and Longmaxi Formation in the south of Jiaoshiba area, Sichuan Basin [J]. Acta Petrolei Sinica, 2021, 42(5): 611-622.
[12]	Li Feng, Zhu Guangyou, Lü Xiuxiang, Zhang Zhiyao, Wu Zhenghui, Xue Nan, He Tao, Wang Rui. The disputes on the source of Paleozoic marine oil and gas and the determination of the Cambrian system as the main source rocks in Tarim Basin [J]. Acta Petrolei Sinica, 2021, 42(11): 1417-1436.
[13]	Zhang Shiming, Wang Jiangong, Zhang Yongshu, Zhang Xiaojun, Zhang Tingjing, Cui Jun. Determination of petrophysical property cutoffs of lacustrine dolomite intercrystalline pore reservoir in the Xiaganchaigou Formation,western Q aidam Basin [J]. Acta Petrolei Sinica, 2021, 42(1): 45-55,118.
[14]	Cao Yingquan, Wang Qingbin, Qu Xiyu, Wang Guanmin, Miao Changsheng, Gao Yuan, Chen Sirui. A dissolution experiment of organic acid of cuttings and its verification: a case study of the Dongying Formation of the CFD6-4 oilfield,Bozhong sag [J]. Acta Petrolei Sinica, 2020, 41(7): 841-852.
[15]	Xu Tao, Wei Hengye, Zhang Xuan, Geng Zi'ao, Wang Jianguo. Genesis of hydrothermal replaced cherts in the Middle Permian Maokou Formation: evidences from elements and silicon isotopes of brecciated cherts in Sangshuwan section,Guizhou province [J]. Acta Petrolei Sinica, 2020, 41(4): 446-456.