苏北盆地张家垛油田阜三段油气富集规律

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1、学兔兔www.xuetutu.com沾专天然气比第33卷第2期0IL＆GASGEOLOGY2012年4月文章编号：0253—9985(2012)02—0166—07苏北盆地张家垛油田阜三段油气富集规律焦里力(中国石化华东分公司石油勘探开发研究院，江苏南京210011)摘要：苏北盆地张家垛油田阜宁组三段具有良好的油气勘探潜力，是今后中国石化华东分公司增储上产的一个重要领域。但由于该储层非均质性强，油气富集规律不清楚，严重制约了下一步的勘探开发。通过对烃源岩、储层、圈闭等成藏基本地质条件的研究，利用泥岩压实规律进行异常压力分析。研究结果表明：①阜宁组异常高压为欠压实成因，

2、与干酪根生烃无关，深层优质储层与欠压实密切相关，异常压力高值区是优质储层分布区；②异常压力高值分布在阜三顶一阜四段，高异常压力形成区域性封闭层，油气主要富集于高异常压力之下的低势区；③高异常压力最有利于阜三段油气成藏，而低异常压力区有可能在阜三段的上覆地层戴南组成藏。最终利用高压封闭的区域性盖层和沉积微相研究，认为阜三段向南成藏条件会变好，是下一步勘探的目标区。关键词：异常压力；欠压实；储层；阜三段；张家垛油田；苏北盆地中图分类号：TEl22．3文献标识码：AHydrocarbonenrichmentpatternsofthe3dmemberofFuningForma

3、tioninZhangjiaduooilfield，SubeiBasinJiaoLili(ResearchInstituteofExplorationandDevelopment，SINOPECHuadongOilfieldCompany，Nang，Jiangsu210011，China)Abstract：The3memberofFuningFormationhasagreatpotentialforoilandgasexplorationandwillbeoneofthemostimportanttargetsforreservegrowthandproductio

4、nadditionofSINOPECHuadongOilfieldCompany．However，thereservoirheterogeneityisstrongandhydrocarbonenrichmentpatternsarepoorlyunderstood，seriouslyconstrainingfutureexplorationanddevelopment．Basedonstudyofthebasicgeologicconditionsforsourcerocks，reservoirs，andtraps，abnormalpressureisanalyze

5、daccordingtotherulesofmudstonescompaction．TheabnormalpressuresofFuningFormationarecausedbyofundercompaction，insteadofhydrocarbongenerationofkerogen．Thedeephigh—qualityreservoirsarecloselyrelatedwithunderc0mpactionandthehigh—qualityreser—voirsoccurinareaswheretheabnormalpressureishigh．Th

6、ehighabnormalpressureOccursinintervalfromthetop3memberto4memberofFunningFormationandformsaregionalsea1．Hydrocarbonsmainlyaccumulateinlowpotentialareasbelowthissea1．Highabnormalpressurefavorshydrocarbonaccumulationinthe3men—berofFunningFormation，whilelowabnormalpressuremaybefavorableforh

7、ydrocarbonaccumulationintheO—verlyingDainanFormation．Basedonstudyoftheregionalhighabnormalpressuresealandsedimentarymicrofa-cies，itisbelievedthatthehydrocarbonaccumulationconditionsofthe3memberofFunningFormationarebet。tertothesouth．thusthe3membertothesouthisafavorabletargetforf