呼和湖凹陷南部煤层气储层特征及富集区优选.pdf

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1、2014年6月大庆石油地质与开发June，2014第33卷第3期PetroleumGeologyandOilfieldDevelopmentinDaqingVol_33NO．3DOI：10．3969／J．ISSN．1000．3754．2014．03．035呼和湖凹陷南部煤层气储层特征及富集区优选霍岩(大庆油田有限责任公司勘探开发研究院，黑龙江大庆163712)摘要：呼和湖凹陷煤层气资源量大，是煤层气勘探开发的有利地区。以钻井、测井和三维地震资料为基础，应用地质统计学反演方法和三维地震蚂蚁体、相干体、曲率体属性分析技术，对呼和湖凹陷大二段3大主力煤层开展煤层厚度、孔隙度、渗透率和裂缝发

2、育特征的平面分布预测，分析了其平面展布特征。研究结果表明：3大煤层大部分都比较发育，单层厚度3—9m；孔隙度的分布特征为1号煤层整体较高，其他两层存在局部高值区；渗透率最发育的是3号煤层；裂缝主要发育在两条大断裂附近，在凹陷中间微裂缝较发育。通过对影响煤层气富集的煤层厚度、构造、储层物性和盖层等多种因素综合分析评价，分别优选了3套煤层的煤层气富集区，为煤层气勘探部署和开采提供了有利目标。关键词：海拉尔盆地；呼和湖凹陷；储层特征；煤层气；多学科；综合分析评价；富集区优选中图分类号：TE375文献标识码：A文章编号：1000．3754(2014)03—0164．06CBMRESERVoI

3、RCHARACTERISTICSANDENRICHEDAREASPREFERREDINSoUTHHUHEHUSAGHU0Yan(ExplorationandDevelopmentResearchInstituteofDaqingOilfieldCompanyLtd．，Daqing163712，China)Abstract：BecauseofthelargecoalbedmethaneresourcesinHuhehuSag。SOitiSthefavorableareaforCBMex—plorationanddevelopmentinthesag．Basedonthedrilling

4、，wellloggingand3Dseismicdata，bymeansofgeosta—tisticalinvertingmethod，3Dseismicant，coherenceandcurvatureattributeanalyzingtechniques，thepredictionsoftheplanardistributionsofthethickness，porosity，permeabilityandfracturedevelopmentcharacteristicsarecon—ductedforthethreemaincoalbedsinMemberDa-2ofth

5、esag，andmoreovertheplanarspreadfeaturesofthea—bovearealsofiguredout．Theresearchresultsshowthatmostofthecoalseamsstatedabovearewelldeveloped，theindividualbedthicknessisbetween3mand9m；theporositydistributionischaracterizedbytheoverallhigherporosityforthefirstcoalseamandpartiallyhigherporosityfort

6、heothers；forthepermeability，thethirdcoalseamisbestdeveloped；thefracturesaremainlydevelopednearbythetwobiggerfaultfractures，whilethemicro—frac—turesaredevelopedinthemiddleofthesag．Throughthecomprehensiveanalysisandevaluationofmultipleinflu—encingfactorsforthethickness，structures，physicalproperti

7、es，caprocksandSOonoftheCBMenrichedreser—voirs，threesetsoftheCBMenrichedlayerarepreferredandselected．Thusthefavorabletargetsfortheexplorationdeploymentandexploitationofthecoalbedmethanearepresented．Keywords：HailerBasin；HuhehuSag；re