三种端元气δ^(13)C_1-R_o模型建立与应用  

Development and Application of Three End-member Gas δ^(13)C_1-R_o Models

作　　者：程付启[1] 朱亚杰 金强[1] 洪国郎 CHENG Fuqi;ZHU Yajie;JIN Qiang;HONG Guolang(School of Geosciences,China University of Petroleum,Shandong,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《西南石油大学学报（自然科学版）》2018年第4期61-68,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2016ZX05006-007;2016ZX05014-002);山东省自然科学基金(ZR2014DL004)

摘　　要：端元气δ^(13)C_1-R_0模型是天然气成因判识、气源对比及混源气定量判识的重要工具。为了满足Ⅱ型有机质生成天然气识别及评价的需要,根据母质类型将有机热成因天然气划分为Ⅰ、Ⅱ和Ⅲ型等3种端元气,并利用126组实测天然气数据得到3种端元气的δ^(13)C_1-R_0模型。Ⅰ型,δ^(13)C_1=27.55lgR_0-47.20;Ⅱ型,δ^(13)C_1=25.55lgR_0-40.76;Ⅲ型,δ^(13)C_1=48.77 lgR_0-34.10(R_0<0.9%),δ^(13)C_1=22.42 lgR_0-34.80(R_0≥0.9%)。为了方便模型应利用建模样品的δ^(13)C_1、δ^(13)C_2数据,绘制了三端元气及其混源气的别图版。根据该图版,济阳拗陷坨165、车571与孤东9井天然气分别为Ⅰ和Ⅱ型端元气混源、Ⅱ型端元气与Ⅰ型端元气。End-member gasδ^13C1-Ro modeling is an important tool for natural gas origin identification,gas-source correlation,and mixed-source gas quantitative processing.In order to identify and evaluate type II natural gas generated by organic matter,organic thermogenic gas is broken down into the following three types of end-member gas according to the type of parent material:Type I,II,and I.δ^13C1-Ro models for the three types of end-member gas were then developed using 126 endmember gas were then developed using 126 data sets obtained from natural I:δ^13C1=27:55 lg Ro-47:2;Type II:δ^13C1=25:55 lg Ro-40:76;Type III:δ^13C1=48:77 lg Ro-34:1,if Ro<0:9%,andδ^13C1=22:42 lg Ro-34:8,if Ro>0:9%.To facilitate application of the models,a chart was generated to identify theδ^13C1-δ^13C2 values of the three end-member gases and their mixtures usingδ^13C1 andδ^13C2 data obtained from the samples for modeling.from the samples for modeling.According to the chart,the natural gases from Jiyang Depression Tuo 165,Che 571,and Gudong 9 wells are mixture of Type I and II end-member gas,Type II end-member gas,and Type I end-member gas,respectively.

关 键 词：端元气 δ^13C1-Ro模型 类型判识 济阳拗陷 

分 类 号：TE132[石油与天然气工程—油气勘探]