东海盆地丽水凹陷原油地球化学特征及其来源分析
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摘要
丽水凹陷已发现的原油来源复杂,通过对已发现的不同区带原油的地球化学特征的分析,明确了已发现的油气来源。依据原油族组成、轻烃、全烃及萜烷、甾烷等指纹特征,认为丽水凹陷原油在类异戊二烯烷烃、规则甾烷、Pr/Ph等方面存在一定差异,反映其来自不同的油源。可以划分三类来源,其中丽水东次凹轻质油来源于其凹陷内月桂峰组烃源岩,灵峰潜山带轻质油是东、西两个次凹月桂峰组的混合来源;丽水西次凹凝析油也呈现混源油特征,但其主要来自西次凹的月桂峰组和灵峰组的烃源贡献。
Hydrocarbon sources of crude oil are complex in the Lishui sag. In this study we sample geochemical characteristics of crude oil from different areas and identify the oil sources. According to the fingerprint characteristics of crude oil composition such as light hydrocarbons, total hydrocarbons, sterane and terpane finger print characteristics, some differ in, for example, the isoprenoid alkane, regular decane and Pr/Ph value. This suggests that that three different types of oil sources can be identified. The light oil in East Lishui sag is derived from the source rocks of the Yueguifeng Formation,the light oil in the Lingfeng buried hill belt is a mixture of oil from the east and west sag from the Yueguifeng Formation, and the west Lishui sag condensate oil exhibits the characteristics of mixed source oil. However, the main contribution is from the Yueguifeng Formation and the Lingfeng Formation hydrocarbon source.
Hydrocarbon sources of crude oil are complex in the Lishui sag. In this study we sample geochemical characteristics of crude oil from different areas and identify the oil sources. According to the fingerprint characteristics of crude oil composition such as light hydrocarbons, total hydrocarbons, sterane and terpane finger print characteristics, some differ in, for example, the isoprenoid alkane, regular decane and Pr/Ph value. This suggests that that three different types of oil sources can be identified. The light oil in East Lishui sag is derived from the source rocks of the Yueguifeng Formation,the light oil in the Lingfeng buried hill belt is a mixture of oil from the east and west sag from the Yueguifeng Formation, and the west Lishui sag condensate oil exhibits the characteristics of mixed source oil. However, the main contribution is from the Yueguifeng Formation and the Lingfeng Formation hydrocarbon source.
引文
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[14]葛和平,陈建平,陈晓东,等.东海盆地丽水凹陷天然气类型及其成因探讨[J].中国科学D辑(地球科学),2007,37(S2):104-110.GE H P,CHEN J P,CHEN X D,et al.Discussion of gas type and genesis in Lishui Sag,East China Sea Basin[J].Science in China(Series D),2007,37(S2):104-110.
[15]王国纯.东海盆地油气勘探焦点问题探讨[J].中国海上油气(地质),2003,17(1):29-32.WANG G C.Discussion on some focal problems of petroleum explration in East China Sea Basin[J].China Offshore Oil and Gas,2003,17(1):29-32
[16]孙玉梅,席小应.东海盆地丽水凹陷油气源对比与成藏史[J].石油勘探与开发,2003,30(6):24-28.SUN Y M,XI X Y.Petroleum reservoir filling history and oilsource correlation in Lishui Sag,East China Sea Basin[J].Petroleum Exploration and Development,2003,30(6):24-28.
[17]黄志龙,姜亮,郝石生.东海盆地丽水凹陷天然气成因类型[J].天然气工业,2003,23(3):29-31.HUANG Z L,JIANG L,HAO S S.Classification of gas genesis in Lishui Sag of East Sea Basin[J].Natural Gas Industry,2003,23(3):29-31.
[18]刘景彦,陈志勇,林畅松,等.东海丽水西次凹古新统明月峰组层序一体系域分析及沉积体系展布[J].沉积学报,2004,22(3):380-386.LIU J Y,CHEN Z Y,LIN C S,et al.Analyeis on sequencetracts and distribution of depositional systems of paleocene mingyuefeng formation in west Lishui sag East China Sea[J].Acta Sedimentologica Sinica,2001,22(3):380-386.
[19]陈国俊,李超,梁建设,等.东海陆架盆地瓯江凹陷明月峰组沉积相及沉积特征分析[J].天然气地球科学,2011(5):760-769.CHEN G J,LI C,LIANG J S,et al.Sedimentary facics of mingyuefeng formation in Oujiang Sag,East China Sca Basin[J].Natural Gas Geoscience,2011(5):760-769.
[20]葛和平,陈志勇,方来富,等.丽水凹陷油气成藏期次探讨[J].中国海上油气(地质),2003,17(1):46-52.GE H P,CHEN Z Y,FANG L F,et al.A discussion on hydrocarbon accumulation periods in Lishui Sag,East China Sea Basin[J].China Offshore Oil and Gas(Geology),2003,17(1):46-52.
[21]姜正龙,王延斌,姜亮.丽水凹陷油气成藏分析[J].海洋地质动态,2005,21(1):29-34.JIANG Z L,WANG Y B,JIANG L.Hydrocarbon accumulation process of Lishui Sag[J].Marine Geology Letters,2005,21(1):29-34.
[2]蔡周荣,夏斌,孙向阳,等.丽水-椒江凹陷断裂构造特征与成盆机制的关系[J].海洋地质动态,2007,23(10):1-5.CAI Z R,XIA B,SUN X Y,et al.Relationship of fracture structural features and basin formation mechanism in the Lishui-Jiaojiang Sag[J].Marine Geology Letters,2007,23(10):1-5.
[3]陈志勇,吴培康,吴志轩.丽水凹陷石油地质特征及勘探前景[J].中国海上油气(地质),2000,14(6):19-26.CHEN Z Y,WU P K,WU Z X.Petroleum geology and exploration potential oI Lishui Sag[J].China Offshore Oil and Gas(Geology),2000,14(6):19-26.
[4]贾成业,夏斌,王核,等.东海陆架盆地丽水凹陷构造演化及油气地质分析[J].天然气地球科学,2006,17(3):397-401.JIA C Y,XIA B,WANG H,et al.Characters oI tectonic evolution and petroleum geology in Lishui Sag,East China Sea Basin[J].Natural Gas Geoscience,2006,17(3):397-401.
[5]张胜利,夏斌.丽水-椒江凹陷构造演化特征与油气聚集[J].天然气地球科学,2005,16(3):324-328.ZHANG S L,XIA B.Characters oI tectonic evolution of the LishuiJiaojiang sag and oil accumulation[J].Natural Gas Geoscience,2005,16(3):324-328.
[6]许红,马惠福,蒲庆南,等.东海陆架盆地新生代地层特征及其含油气性[J].海洋地质动态,2003,19(4):22-25.XU H,MA H F,PU Q N,et al.Stratigraphic features and hydrocarbon potential of Cenozoic in the Southern East China Sea Shelf Basin[J].Marine Geology Letters,2003,19(4):22-25.
[7]任征平,顾惠荣,殷培龄.油气成藏组合在东海陆架盆地油气评价中的应用[J].上海地质,1995,16(4):41-48.REN Z P,GU H R,YIN P L.An application of plays on oil and gas evolution of East China Sea Basin[J].Shanghai Geology,1995,16(4):41-48.
[8]赵金海.东海中、新生代盆地成因机制和演化(上)[J].海洋石油,2004,24(4):6-14.ZHAO J H.The forming factors and evolvement of the Mesozoic and Cenozoic Basin in the East China Sea[J].Offshore Oil,2004,24(4):6-14.
[9]冯晓杰,蔡东升.东海陆架盆地中新生代构造演化对烃源岩分布的控制作用[J].中国海上油气,2006,18(6):372-375.FENG X J,CAI D S.Controls of mesozoic and cenozoic tectonic evolution on source rock distribution in East China Sea Shelf Basin[J].China Offshore Oil and Gas,2006,18(6):372-375.
[10]于仲坤,丁飞,赵洪.西湖凹陷构造演化特征及油气运聚单元划分[J].上海国土资源,2018,39(4):75-78.YU Z K,DING F,ZHAO H.Characteristics of structural evolution and classification of hydrocarbon migration and accumulation units in Xihu Sag,China[J].Shanghai Land&Resources,2018,39(4):75-78.
[11]周祥林,高伟中,张建培,等.东海西湖凹陷平北断裂特征及其对油气成藏的控制[J].上海国土资源,2014,35(2):54-57.ZHOU X L,GAO W Z,ZHANG J P,et al.Fractures in the Pingbei area and their control on hydrocarbon accumulation in the Xihu sag of the East China Sea[J].Shanghai Land&Resources,2014,35(2):54-57.
[12]郭永华,于水,葛玲.东海盆地丽水凹陷LS36-1构造成藏机理研究[J].石油勘探与开发,2003,30(6):29-31.GUO Y H,YU S,GE L.Formation of the LS36-1 oil and gas structure in the Lishui Sag,East China Sea Basin[J].Petroleum Exploration and Development,2003,30(6):29-31.
[13]张田,张建培,张绍亮,等.平衡剖面技术在东海丽水凹陷构造演化研究中的应用[J].上海国土资源,2014,35(1):92-96.ZHANG T,ZHANG J P,ZHANG S L,et al.An application of the balanced cross-section technique:the tectonic evolution of Lishui Sag,the East China Sea shelf basin[J].Shanghai Land&Resources,2014,35(1):92-96.
[14]葛和平,陈建平,陈晓东,等.东海盆地丽水凹陷天然气类型及其成因探讨[J].中国科学D辑(地球科学),2007,37(S2):104-110.GE H P,CHEN J P,CHEN X D,et al.Discussion of gas type and genesis in Lishui Sag,East China Sea Basin[J].Science in China(Series D),2007,37(S2):104-110.
[15]王国纯.东海盆地油气勘探焦点问题探讨[J].中国海上油气(地质),2003,17(1):29-32.WANG G C.Discussion on some focal problems of petroleum explration in East China Sea Basin[J].China Offshore Oil and Gas,2003,17(1):29-32
[16]孙玉梅,席小应.东海盆地丽水凹陷油气源对比与成藏史[J].石油勘探与开发,2003,30(6):24-28.SUN Y M,XI X Y.Petroleum reservoir filling history and oilsource correlation in Lishui Sag,East China Sea Basin[J].Petroleum Exploration and Development,2003,30(6):24-28.
[17]黄志龙,姜亮,郝石生.东海盆地丽水凹陷天然气成因类型[J].天然气工业,2003,23(3):29-31.HUANG Z L,JIANG L,HAO S S.Classification of gas genesis in Lishui Sag of East Sea Basin[J].Natural Gas Industry,2003,23(3):29-31.
[18]刘景彦,陈志勇,林畅松,等.东海丽水西次凹古新统明月峰组层序一体系域分析及沉积体系展布[J].沉积学报,2004,22(3):380-386.LIU J Y,CHEN Z Y,LIN C S,et al.Analyeis on sequencetracts and distribution of depositional systems of paleocene mingyuefeng formation in west Lishui sag East China Sea[J].Acta Sedimentologica Sinica,2001,22(3):380-386.
[19]陈国俊,李超,梁建设,等.东海陆架盆地瓯江凹陷明月峰组沉积相及沉积特征分析[J].天然气地球科学,2011(5):760-769.CHEN G J,LI C,LIANG J S,et al.Sedimentary facics of mingyuefeng formation in Oujiang Sag,East China Sca Basin[J].Natural Gas Geoscience,2011(5):760-769.
[20]葛和平,陈志勇,方来富,等.丽水凹陷油气成藏期次探讨[J].中国海上油气(地质),2003,17(1):46-52.GE H P,CHEN Z Y,FANG L F,et al.A discussion on hydrocarbon accumulation periods in Lishui Sag,East China Sea Basin[J].China Offshore Oil and Gas(Geology),2003,17(1):46-52.
[21]姜正龙,王延斌,姜亮.丽水凹陷油气成藏分析[J].海洋地质动态,2005,21(1):29-34.JIANG Z L,WANG Y B,JIANG L.Hydrocarbon accumulation process of Lishui Sag[J].Marine Geology Letters,2005,21(1):29-34.
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