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ID:37380825
大小:1.00 MB
页数:6页
时间:2019-05-22
《济阳坳陷致密砂岩储层油气成藏机理探讨》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第35卷第2期石油察劈弛届V01.35.No.22013年3月PETRoLEUMGE0LoGY&EXPERIMENTMar.,2013文章编号:1001-6112(2013)02—0115—05doi:10.11781/sysydz20130201济阳坳陷致密砂岩储层油气成藏机理探讨刘传虎,王永诗,韩宏伟,王学忠(中国石化胜利油lit分公司,山东东营257001)摘要:致密砂岩储层渗透率小于10xl0I3p,m,由于其储集空间类型及特征的特殊性,在油气成藏机理方面与常规油气藏存在根本的区别。该文从分析“根缘气”的形成条件及成藏特点出发,以模拟实验
2、为基础,根据济阳坳陷致密储层特点,探讨油气成藏机理:致密储层油气运移成藏以超压充注为主,超压传递到达的边界就是其含油(气)边界,超压梯度大,油气充注的距离和圈闭滞留的范围就大,含烃饱和度也相对高。通过成藏相似性研究认为,济阳坳陷致密砂岩油气藏具以下特点:①烃源岩持续供烃,源内及附近储层蕴含着大量的分异性较差的油气;②致密砂岩储层“相势控藏”;③具有大面积分布致密油气藏的条件.勘探潜力大关键词:渗透率;致密砂岩储层;超压充注油气成藏;济阳坳陷;渤海湾盆地中图分类号:TEl22.3文献标识码:AHydrocarbonaccumulationmecha
3、nismoftightsandstonereservoirinJiyangDepressionLiuChuanhu,WangYongshi,HanHongwei,WangXuezhong(SINOPECShengliOilfieldCompany,Dongying,Shandong257001,China)Abstract:Thepermeabilityoftightsandstonereservoirsisbelow10xl0一m.Duetothepal~icularityofreser-voirspacetypeandcharacterist
4、ics,thetightsandstonereservoirsaredifferentfromnormalonesinhydrocarbonaccumulationmechanism.Thegenerationconditionsandaccumulationfeaturesof“source—contactinggas”arestudied.Basedonsimulationexperiments,hydrocarbonaccumulationmechanismisconcludedaccordingtothefeaturesoftightsa
5、ndstonereservoirsintheJiyangDepression.Overpressurechargingisthemainwayofhydro—carbonmigrationandaccumulationintightsandstonereservoir.Theborderforoverpressuretransferisthebound-aryforoilorgas.Whenoverpressuregradientislarger,thedistanceofhydrocarbonchargingandtherangeoftrapw
6、illbelarger,andthehydrocarbonsaturationwillbehigher.Throughsimilarityresearch,thetightsand—stonereservoirsintheJiyangDepressionhavethefollowingcharacteristics.1)Sourcerockscontributetohydro-carboncontinuously.Largequantityofoilandgaswithpoordiversityexistinsourcerocksorneighb
7、oringreser-voirs.2)Intightsandstonereservoirs,faciesandpotentialcontrolaccumulation.3)Tightreservoirsmayexistwidely,indicatingforgoodexplorationpotentia1.Keywords:permeability;tightsandstonereservoir;overpressurecharging;petroleumaccumulation;JiyangDe—pression;BohaiBayBasin随着
8、油气勘探开发技术的发展和对能源的巨由于中、高渗透储集层和低渗透致密储集层微观特大需求,现已发现在渗透率小于0.1×10~m、孔征的不同,
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