Characteristics of Diamondoids and Light Hydrocarbons From Niudong Field and Implication for Oil/Gas Origin

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  • ( 1.Huabei Oilfield Company, PetroChina, Renqiu 062550, China; 2.Key Laboratory of Petroleum Geochemistry,
    China National Petroleum Corporation, Beijing 100083, China; 3.School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China )

Received date: 2013-12-23

  Revised date: 2014-03-28

  Online published: 2014-09-10

Abstract

Niudong condensate field is the one with the deepest burial depth and highest temperature (201℃) that has ever been found in Bohaiwan Basin so far.There are some contradictory results in determination of the origin of oil and gases by normal geochemical indexes.The diamondoids and light hydrocarbons in Niudong condensate field were measured using comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry.The parameters of light hydrocarbons suggest that the maturity of condensate reaches to RO of 2.0%,and this indicates that oil had suffered cracking.The concentrations of 3,4-dimethyldiamantane,an index of oil cracking degree,in oils from ND 1 and ND 101 wells are 111.743mg/kg and 73.03mg/kg,respectively.This indicates that the cracking degree of normal oil amounts to 60%-70%.The geochemistry of source rocks from ND 1 well suggests that there are some  type Ⅲ organic matters in addition to type Ⅰand Ⅱ kerogen in the Shahejie Formation source rocks.The complexity and heavy carbon isotope of ethane in gases are caused by mixture of oil cracking gases and primary gases of type Ⅲ kerogen.The CO2 in Niudong condensate field resulted from  the reaction between dolomite and hydrochloric acid used in hydro-fracturing fluid during oil and gas exploitation.
 
 

Cite this article

ZHAO Xian-zheng,JIN Feng-ming,MI Jing-kui,CUI Zhou-qi,WANG Ji-mao,LI Hui,HE Kun,DING Han . Characteristics of Diamondoids and Light Hydrocarbons From Niudong Field and Implication for Oil/Gas Origin[J]. Natural Gas Geoscience, 2014 , 25(9) : 1395 -1402 . DOI: 10.11764/j.issn.1672-1926.2014.09.1395

References

[1]Du Jinhu,Zhao Xianzheng,Zhang Yiming,et al.The Discovery and significance of Niudong 1 exploration well[J].China Petroleum Exploration,2012,(1):1-7.[杜金虎 赵贤正,张以明,等.牛东1风险探井重大发现及其意义[J].中国石油勘探,2012,(1):1-7.]
[2]Zhao Xianzheng,Jin Fengming,Wang Quan,et al.A superdeep and superhigh temperature carbonate buried-hill reservoir in Eastern China:Discovery and the key exploration Technology of Nudong-1 buried-hill oil and gas reservoir in Jizhong Depression,Bohaiwan Basin[J].Marine Petroleum Geology,2011,16(4):1-10.[赵贤正,金凤鸣,王权,等.中国东部超深超高温碳酸盐岩潜山油气藏的发现及关键技术——以渤海湾盆地冀中坳陷牛东1潜山油气藏为例[J].海相油气地质,2011,16(4):1-10.]
[3]Zhao Xianzheng,Jin Fengming,Wang Quan,et al.Niudong 1 ultra-deep and ultra-high temperature subtle buried hill field in Bohai Bay Basin:Discovery and significance[J].Acta Petroleum Sinica,2011,32(6):915-927.[赵贤正,金凤鸣,王权,等.渤海湾盆地牛东1超深潜山高温油气藏的发现及其意义[J].石油学报,2011,32(6):915-927.]
[4]Dai Jinxing.Identification of hydrocarbon gases with different origins[J].Science in China:Series B,1992,(2):185-193.[戴金星.各类烷烃气的鉴别[J].中国科学:B辑,1992,(2):185-193.]
[5]Dai J X,Yang S F,Chen H L,et al.Geochemistry and occurrence of inorganic gas accumulations in Chinese sedimentary basins[J].Organic Geochemistry,2005,36:1664-1688.
[6]Tompson K F M.Light hydrocabons in subsurface sediments[J].Geochimica et Cosmochimica Acta,1979,43(5):657-672.
[7]Wang Peirong.The Measurement and Geochemical Application of Light Hydrocarbon Fractions Occured Insource Rock[M].Beijing:Petroleum Industry Press,2011.[王培荣.烃源岩与石油中轻馏分烃测定及其红地球化学应用[M].北京:石油工业出版社,2011.]
[8]Dahl J E,Moldowan J M,Peters K,et al.Diamondoid hydrocarbons as indicators of oil cracking[J].Nature,1999,399:54-56.
[9]Wei Zhibin,Moldowan J M,Paytan A.Diamondoids and molecular biomarkers generated from modern sediments in the absence and presence of minerals during hydrous pyrolysis[J].Organic Geochemistry,2006,37:891-911.
[10]Tissot B P,Welte D H.Petroleum Formation and Occurrence:A New Approach to Oil and Gas Exploration[M].Berlin,Heidelberg,New York:Springer-Verlag,1978.
[11]Zhang Shuichang,Zhao Wenzhi,Wang Feiyu,et al.Formation history of Palaeozoic oil cracking gas pool developed in eastern Tarim Basin:Case as Yingnan2 gas pool[J].Natural Gas Geoscience,2004,15(5):441-451.[张水昌,赵文智,王飞宇,等.塔里木盆地东部地区古生界原油裂解气成藏历史分析——以英南2气藏为例[J].天然气地球科学,2004,15(5):441-451.]
[12]Gao Shengjun,Chen Yicai,Li Yanjun,et al.Pyrolysis on crude oil and characteristics of Sha 4 member cracking gas,Dongying Depression[J].Natural Gas Geoscience,2009,20(1):32-35.[高生军,陈义才,李延钧,等.东营凹陷沙四段原油裂解热模拟实验及产物特征[J].天然气地球科学,2009,20(1):32-35.]
[13]Hou Dujie,Zhao Zengying,Tang Youjun,et al.The geological and geochemical characteristics of oil cracked gas in Kekeya region,Tarim Basin[J].Natural Gas Geoscience,2004,15 (2):137-141.[侯读杰,赵增迎,唐友军,等.柯克亚地区原油裂解气的地质—地球化学特征[J].天然气地球科学,2004,15 (2):137-141.]
[14]Mi J K,Zhang S C,Hu G Y,et al..Geochemistry of coal-measure source rocks and natural gases in deep formations in Songliao Basin,NE China[J].International Journal of Coal Geology,2010,84:276-285.

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