琼东南深水区华光凹陷渐新统崖城组烃源岩早期预测
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摘要
深水低勘探领域是当今世界油气勘探关注的热点之一,有效烃源岩发育程度是低勘探领域烃源岩早期评价首先需要回答的关键问题。而低勘探领域钻井稀少,缺乏采样分析资料,严重制约着烃源岩早期预测。针对这一严峻挑战,本文在借鉴邻区井孔实测资料的基础上,充分利用层序地层学、有机地球化学和地球物理技术,探讨了以多项烃源岩参数为主的5项烃源岩早期预测评价方法,即:1利用层序地层分析方法确定有利烃源岩发育层段;2利用地震速度-岩性定量预测方法确定烃源岩厚度;3利用地震绝对速度定量估算烃源岩成熟度Ro;4运用地震相转沉积相,再由沉积相转有机相方法预测烃源岩有机相类型和分布;5烃源岩层段综合评价优选。应用该方法对华光凹陷渐新统崖城组烃源岩进行了烃源岩早期预测,发现崖城组各段烃源岩厚度具有北厚南薄的特征,崖二段烃源岩最厚可达450m;崖城组烃源岩热演化程度整体较高,受埋深影响,崖三段烃源岩Ro值最高;崖二段浅海相烃源岩分布范围最大,滨岸平原沼泽相最窄,崖一段和崖三段浅海相烃源岩分布范围小,但滨岸平原沼泽相烃源岩分布最宽,并且扇三角洲分流平原沼泽相烃源岩分布较广;烃源岩综合评价分析认为崖二段是最有利烃源岩,崖一段和崖三段是较有利烃源岩。
Low exploration area in deepwater is one of the hot issues in oil and gas exploration nowadays.The development of effective hydrocarbon source rock is a first key question to be answered in early evaluation for source rock of low exploration fields.However,scarce drilling and lack of sampling analysis data have seriously been restricting early evaluation of source rock in low exploration area.In response to this challenge,this article has discussed early prediction of source rock and evaluation method with multiple source rock parameters using borehole data in adjacent areas,sequence stratigraphy,organic geochemical and geophysical technology.And this methodology includes five aspects:(1)using sequence stratigraphy to determine the main interval of source rocks;(2)quantitative prediction method of seismic velocitylithlogy to determine the thickness of source rocks;(3)prediction of vitrinite reflectance with mudstone absolute velocity to determine the maturity(Ro)of source rocks;(4)type prediction of organic facies based on the conversion from seismic facis to sedimentary facies and organic facies;(5)comprehensive evaluation to select optimum hydrocarbon generating depression.These methods are also applied to early prediction of the source rocks of Oligocene Yacheng Formation in the Huaguang depression.The results indicate that the thickness of source rock in the Yacheng Formation shows a decrease from north to south,and source rocks is up to 450 mof thickness in the second member of the Yacheng Formation.Thermal evolution degree of source rocks is very high overall in the Yacheng Formation.Influenced by the burial depth,the maturity degree(Ro)of source rocks in the third member of Yacheng Formation is the highest.The covered area of hydrocarbon source rock with shallow sea facies is the biggest,but shore swamp facies is the narrowest in the second member of Yacheng Formation.In addition,the distribution area of source rock with shallow sea facies is small,but shore swamp facies is wide in the first and third member of Yacheng Formation. Meanwhile,source rocks of fan delta swamp facies are widely distributed.Comprehensive evaluation suggests that the source rocks in the second Member of Yacheng Formation is the most favorable and source rocks in the first while the third Member of Yacheng Formation is less favorable.
引文
曹强,叶加仁.2008.南黄海北部盆地东北凹陷烃源岩的早期预测.地质科技情报,27(4):75~79.
    陈践发,张水昌,孙省利,等.2006.海相碳酸盐岩优质烃源岩发育的主要影响因素.地质学报,80(3):467~472.
    陈欢庆,朱筱敏,张功成,等.2010.琼东南盆地深水区古近系陵水组输导体系特征.地质学报,84(1):138~148.
    戴金星,秦胜飞,陶士振,等.2005.中国天然气工业发展趋势及其地学理论重要进展.天然气地球科学,16(2):127~142.
    郭志峰,刘震,吕睿,等.2012.南海北部深水区白云凹陷钻前地层压力地震预测方法.石油地球物理勘探,47(1):126~132.
    郝芳.2005.超压盆地生烃作用动力学与油气成藏机理.北京:科学出版社.
    黄保家,肖贤明,董伟良.2002.莺歌海盆地烃源岩特征及天然气生成演化模式.天然气工业,22(1):26~30.
    雷超,任建业,裴健翔,等.2011.琼东南盆地深水区构造格局和幕式演化过程.地球科学中国地质大学学报,36(1):151~161.
    李贤庆,肖贤明,米敬奎,等.2005.塔里木盆地库车坳陷烃源岩生成甲烷的动力学参数及其应用.地质学报,79(1):133~142.
    李增学,何玉平,刘海燕,等.2010.琼东南盆地崖城组煤的沉积学特征与聚煤模式.石油学报,31(4):542~547.
    刘震,常迈,赵阳,等.2007.低勘探程度盆地烃源岩早期预测方法研究.地学前缘,14(4):159~166.
    刘震,高先志,曾洪流.1993.辽东湾地区下第三系地震速度岩性预测模型研究.海洋地质与第四纪地质,13(2):371~376.
    刘震,吴耀辉.1997.泥岩压实程度与热成熟度关系分析.地质论评,43(3):290~295.
    刘震,吴因业.1999.层序地层框架与油气勘探.北京:石油工业出版社.
    吕福亮,贺训云,武金云,等.2007.世界深水油气勘探现状、发展趋势及对我国深水勘探的启示.中国石油勘探,12(6):28~31.
    米立军,刘震,张功成,等.2007.南海北部深水区白云凹陷古近系烃源岩的早期预测.沉积学报,25(1):139~146.
    邱楠生.2002.中国西部地区沉积盆地热演化和成烃史分析.石油勘探与开发,29(1):6~9.
    孙清,连琏.2005.中国深水海域油气及相关资源勘探开发进展及关键技术.中国海洋大学学报(自然科学版),35(6):1049~1052.
    王贵文,朱振宇,朱广宇.2002.烃源岩测井识别与评价方法研究.石油勘探与开发,29(4):50~52.
    汪建国,陈代钊,王清晨,等.2007.中扬子地区晚震旦世—早寒武世转折期台—盆演化及烃源岩形成机理.地质学报,81(8):1102~1109.
    杨家騄,徐世球,肖诗宇,等.1995.川黔湘交境寒武纪层序划分.地球科学中国地质大学学报,20(5):485~495.
    杨涛涛,吴敬武,王彬,等.2012.琼东南盆地华光凹陷构造特征及沉积充填.海洋地质与第四纪地质,32(5):13~18.
    赵阳,刘震,谢启超,等.2003.镜质体反射率与砂岩孔隙度关系的研究与应用.中国海上油气(地质),17(5):303~306.
    钟宁宁,赵喆,李艳,等.2010.论南方海相层系有效供烃能力的主要控制因素.地质学报,84(2):149~158.
    朱光有,金强.2002.烃源岩的非均质性研究———以东营凹陷牛38井为例.石油学报,23(5):34~39.
    朱伟林.2010.南海北部深水区油气地质特征.石油学报,31(4):521~527.
    Herrson S L,Letendre I,Dufour M.1988.Source rock evaluationusing geochemical information from wireline logs and cores.AAPG Bulletin,72:1007.
    Nunn J A,Sleep N H,Moore W E.1985.Thermal subsidence andgeneration of hydrocarbons in Michigan Basin:Reply.AAPGBulletin,69:1185~1187.
    Passey Q R,Creaney S A.1990.Practical model for organicrichness from porosity and resistivity logs.AAPG Bulletin,74(12):1777~1794.
    Pettingill H S,Weimer P.2002.Worldwide deepwater explorationand production:Past,present,and future.The Leading Edge,21(4):371~376.
    Pinder D.2001.Offshore oil and gas:Global resource knowledgeand technological change.Ocean&Coastal Management,44(9~10):576~600.
    Schmoker J W.1988.Sand porosity as a function of thermalmaturity.Geology,16(11):1007~1010.

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