鲕状云岩“碳”定量测试技术研究及应用  

Research and Application of "Carbon" Quantitative Measurement Technology for Oolitic Dolomite

作　　者：李岩[1] 罗静 朱遂珲 赵佳男 LI Yan;LUO Jing;ZHU Sui-hui;ZHAO Jia-nan(Northeast Petroleum University,Daqing 163318,China;Northwest Sichuan Gas Field of PetroChina Southwest Oil&Gas Field Company,Mianyang 621700,China)

机构地区：[1]东北石油大学土木建筑工程学院,大庆163318 [2]中国石油西南油气田分公司川西北气矿,绵阳621700

出　　处：《当代化工》2020年第11期2540-2542,2569,共4页Contemporary Chemical Industry

基　　金：国家科技重大专项项目(项目编号:2016ZX05054);黑龙江省大学生创新项目(项目编号:201910220130)

摘　　要：以普光PG-T、PG-S井鲕状云岩为研究对象,检测其"碳"质量分数,从而定量描述焦质烃质量分数,判断储层类型;同时基于稳定碳元素守恒机理,以储层"碳"数据为桥梁,计算古构造烷烃气总量,分析古构造石油及油热解生气潜力。结果表明:储层鲕状云岩"碳"质量分数0.43%、0.36%、0.22%分别对应Ⅰ、Ⅱ、Ⅲ型储层;普光构造鲕状云岩储层原油总量达到5.22亿t,古原油热解生成的烷烃气总量为3722.5亿m3,截至目前,普光气田已探明的天然气地质储量为3600亿m3,与目前的开采实际情况一致,实现了储层类型及烷烃气潜力定量化、动态化的评价。分析认为,单独依靠古石油热解产生的天然气量不能导致普光气藏的出现,下二叠龙潭组烃源岩对普光气田有着一定的贡献。Taking the oolitic dolomites of PG-T and PG-S wells in Puguang area as research objects,their"carbon"contents were detected so as to quantitatively describe the content of coke hydrocarbon and judge the type of reservoirs.At the same time,based on the mechanism of stable carbon element conservation,taking the"carbon"data of reservoir as a bridge,the total amount of alkane gas in the paleostructure was calculated,and the potential of gas production through paleostructure oil and oil pyrolysis was analyzed.The results show that the"carbon"contents in the oolitic dolomite of the reservoir are 0.43%,0.36%and 0.22%,respectively,corresponding to typeⅠ,ⅡandⅢreservoirs;the total crude oil of oolitic dolomite reservoir in Puguang structure reaches 522 Mt,and the total amount of alkane gas generated by pyrolysis of ancient crude oil is 372.25 billion m~3.Up to now,the proved geological reserves of natural gas in Puguang gas field is 360 billion m~3,which is consistent with the current actual situation of exploitation.The analysis shows that the natural gas produced by pyrolysis of paleooil alone cannot lead to the appearance of Puguang gas reservoir,and the source rock of the lower Permian Longtan formation has a certain contribution to Puguang gas field.

关 键 词：鲕状云岩 烷烃气 测试 守恒原理 

分 类 号：P618.13[天文地球—矿床学]