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时间:2020-01-14
《塔北哈拉哈塘地区奥陶系碳酸盐岩岩溶层组特征与溶蚀强度分析.pdf》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37卷第5期石油褒驺沾届Vol_37.No.52015年9月PETROI,El『MGEOLoGY&EXPE删ENTSep.,2015文章编号:1001—6112(2015)05—0582—09doi:10.11781/sysydz201505582塔北哈拉哈塘地区奥陶系L工_JL工J碳酸盐石石溶层组特征与溶蚀强度分析淡永,梁彬,曹建文,张庆玉,郝彦珍,李景瑞,(1.成都理工大学沉积地质研究院,成都610059;2.中国地质科学院岩溶地质研究所,广西桂林541004;3.国土资源部/广西壮族自治区岩溶动力学重点实验室,广西桂林5410
2、04)摘要:塔北哈拉哈塘地区奥陶系多个层位均发育岩溶缝洞型储层。对钻井岩心系统采样测试分析,总结了哈拉哈塘地区不同地层的岩石类型及其纵向组合发育特征。不同类型碳酸盐岩溶蚀试验研究发现,泥质含量及Mgo含量对岩石可溶性具有影响,溶蚀强度为纯颗粒石灰岩>>白云质灰岩>白云岩>泥灰岩。以此为基础进行层组划分,将奥陶系碳酸盐岩划分为2类3型5个亚型:一间房组及鹰一、二段为灰岩连续型层组,属强岩溶层组;良一段,鹰三、四段为灰岩夹云岩亚型,岩溶强度属中等;其余各层组溶蚀性较弱。实际钻井结果及地震剖面“串珠”发育情况统计认为,该区岩溶层组类型控制了
3、缝洞型储层的发育。关键词:溶蚀强度;溶蚀试验;古岩溶;缝洞型储层;奥陶系;哈拉哈塘地区;塔里木盆地中图分类号:TEl22.2文献标志码:ACharacteristicsandsolutionintensityofkarstformationsinOrdoviciancarbonatesintheHalahatangareaofthenorthernTarimBasinDanYong一,LiangBin,CaoJianwen,ZhangQingyu,HaoYanzhen,LiJingrui’。(1.InstituteofSediment
4、aryGeology,ChengduUniversityofTechnology,Chengdu,Swhuan610059,China;2.InstituteofKarstGeology,ChineseAcademyofGeologicalSciences,Guilin,Guangxi541004,China;3.KarstDynamicsLaboratory,Min~tryofLandResources/GuangxiZhuangzuAutonomousRegion,Guilin,Guangxi541004,China)Abstra
5、ct:FracturedandvuggyreservoirswerefoundinseveralOrdoviciancarbonateformationsintheHalahatangareaofthenorthernTarimBasin.Thelithologyofdifferentformationsandtheirverticaldistributionwerestudiedbasedonmicroscopicobservationsandgeochemicaltestingofcoresamples.Dissolutionte
6、stsofdifferenttypesofcarbonatesshowedthatthecontentsofargillaceousmatterandMgOcouldinfluencecarbonatesolubility.Thein—tensityofdissolutiondecreasedfrompurelimestones,dolomiticlimestones,dolomitestomuddylimestones.TheOrdoviciancarbonateswereclassifiedintotwoclasses,three
7、typesandfivesubtypes.TheYijianfangFormationandthefirstandsecondmembersoftheYingshanFormationarecontinuouslimestoneswithstrongkarstification.ThefirstmemberoftheLianglitageFormationandthethirdandfourthmembersoftheYingshanFormationaredolomiticlimestoneswithmediumkarstifica
8、tion.Theotherformationswereweaklykarstified.Drillingresultsandthepresenceof“stringedbeads”onseismicprofilesind
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