三级圈闭含油气概率和资源量表征方法探讨

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1、第36卷第4期石油囊劈沾届V01．36．No．42014年7月PETRoLEUMGEoLoGY&EXPERIMENTJu1．，2014文章编号：1001-6112(2014)04—0495—05doi：10．11781／sysydz201404495三级圈闭含油气概率和资源量表征方法探讨闫相宾，李军，杨双(中国石化石油勘探开发研究院，北京l000831摘要：在油气预探阶段钻探目标评价优选是以新区和老区“三新”领域的三级圈闭为着眼点。将同一区带上的相同类型和相似成藏条件的2个或2个以上的四级圈闭统称为1个三级

2、圈闭：其含油气概率和资源价值是部署预探井的关键要素。在预探项目优选决策中，三级圈闭的含油气概率应采用预探井首钻四级圈闭的储层概率、保存概率、充注概率和圈闭概率的乘积，而非所有四级圈闭的含油气概率的算术平均值。三级圈闭的资源量应采用满足首钻四级圈闭成功的前提条件下，三级圈闭可获得的资源量进行表征，而不是各四级圈闭资源量算术相加和至少有1个四级圈闭成功条件下的三级圈闭资源量；三级圈闭资源量大小与各四级圈闭的资源量、含油气概率、四级圈闭之间的地质相关性和首钻四级圈闭的选择有关。关键词：含油气概率：三级圈闭；圈闭资

3、源量；圈闭经济评价：东营凹陷中图分类号：TEl55文献标识码：AAnapproachtohydrocarbon-bearingprobabilityandresourcecharacterizationofthird—ordertrapYanXiangbing，LiJun，YangShuang(SINOPECPetroleumExplorationandProductionResearchInstitute，Beijing100083，China)Abstract：Thewildcatsaimprimari

4、lyatthethird—ordertrapsinnewareasorthenewexplorationdomains，thenewseriesofstrata，andthenewtypesofreservoirinoldareas．Thethird—ordertrapisreferredtotwoormorethantwofourth—ordertrapswhicharelocatedatthesamehydrocarbonzone，havethesametraptypeandhavethesimilar

5、geologicalconditionforthehydrocarbonaccumulation．Thehydrocarbonprobabilityandtheresourcevalueofthethird—ordertraparethekeyfactorstodecidewhetherthedrillingisperformedornot．Intheprospectscreeninganddecisionanalysis，thehydrocarbon—bearingprobabilityofathird-

6、ordertrapshouldusetheproba—bilityproductofthetrap，charge，reservoirsandsealofthefirst-drilledfourth—ordertrap，notthearithmeticmeanofthehydrocarbon—bearingprobabilityofallthefourth—ordertraps．Theresourceofthird-ordertrapshallbecharacterizedbymeetingtheprereq

7、uisitethatthefirst—-drilledfourth·-ordertrapissuccessfulanditisnotthea··rithmeticsumofeachfourth·-ordertraporthethird--ordertrapresourcewhichisundertheconditionthatatleastoneoffourth—ordertrapissuccessfu1．Thesizeofthethird—ordertrapresourceisrelatedtothere

8、sourcesofeachfourth—ordertrap，thehydrocarbonprobability，thegeologicalsimilarityamongthefourth—ordertrapsandthese—lectionofthefirst—drilledfourth-ordertrap．Keywords：hydrocarbon—bearingprobability；third—ordertr