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《白云石-方解石氧同位素温度计在川东北地区飞仙关组白云岩成因研究中的尝试论文》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、白云石-方解石氧同位素温度计在川东北地区飞仙关组白云岩成因研究中的尝试［摘要］川东北地区三叠系飞仙关组中，作为最重要储集岩的粒屑白云岩和结晶白云岩的形成机制一直都是高度关注的热点问题。在白云岩结构分类、氧同位素分析的基础上，通过白云石-方解石氧同位素温度计获得了川东北地区飞仙关组不同类型白云岩的形成温度，其中大多数计算温度集中分布在40~140℃区间内，结晶白云岩（包括结构类似的过渡岩石类型）和孔洞白云石的计算温度集中分布在相对高温区间，粒屑白云岩和微晶白云岩的计算温度集中分布在相对低温区间，与前人关于
2、流体包裹体、白云岩形成环境等分析结果有较好的一致性。白云石-方解石氧同位素温度计的初步尝试及其获得的计算温度，可望为川东北地区飞仙关组优质白云岩储层的形成机制研究提供有价值的基础资料。［关键词］氧同位素温度计;白云岩;飞仙关组;三叠系;川东北地区Preliminaryapplicationofthedolomite-calciteoxygenisotopethermometerinstudyingtheoriginofdolomiteinFeixianguanFormation,NortheastSic
3、huan,ChinaHUZuo-wei1,HUANGSi-jing1,LIZhi-ming2,ZHANGXue-hua1,XUEEr-she2,LIUTao11.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,Chengdu610059,China；2.WuxiInstituteofPetroleumGeology,SINOPECExploration&Productio
4、nResearchInstitute,Wuxi214151,ChinaAbstract:ThenaturalgasexplorationandproductionofTriassicFeixianguanFormationinNortheastSichuanplayanimportantroleintheChinesemarineoil&gasindustry.Theoriginofooliticdolomiteandcrystallinedolomite,whicharethemostimportan
5、treservoirsinTriassicFeixianguanFormation,isoneofthehotspotproblems,andhasbeenreceivedspecialattentioninrecentyears.Basedonthetexturalclassificationandoxygenisotopeanalyses,thetemperaturesofdifferenttypesofdolomitesamplesfromFeixianguanFormationofNorthea
6、stSichuanarecalculatedbythedolomite-calciteoxygenisotopethermometer.Mostofthecalculatedtemperaturesrangeoverfrom40℃to140℃.Thecalculatedtemperaturesofcrystallinedolomite(includingthetransitionalrocktypeswiththesimilartexture)anddolomitecementhavearelative
7、lyhightemperaturerangeandthecalculatedtemperaturesofooliticdolomiteandmicritedolomitehavearelativelylowtemperaturerange.Theseresultsareconsistentwiththefluid-inclusionhomogenizationtemperaturesandformationenvironmentofdolomite.Thepreliminaryapplicationan
8、dtheobtainedtemperaturesofthedolomite-calciteoxygenisotopethermometerwillprovidesomevaluablebasicdataforthestudiesofhigh-qualitydolomitereservoirsinTriassicFeixianguanFormationofNortheastSichuan.Keywords:oxygenisotopetherm
