高邮凹陷原油轻烃地球化学特征及群组划分

宋宁; 郭海莹; 侯鹏飞; 杨帅帅; 王广利; 胡建东

doi:10.3981/j.issn.1000-7857.2014.06.006

科技导报 >

2014 , Vol. 32 >Issue 6: 40 - 44

DOI: https://doi.org/10.3981/j.issn.1000-7857.2014.06.006

研究论文

高邮凹陷原油轻烃地球化学特征及群组划分

宋宁 ,
郭海莹 ,
侯鹏飞 ,
杨帅帅 ,
王广利 ,
胡建东

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1. 常州大学石油工程学院, 常州213016;
2. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京102249;
3. 胜利油田渤海钻井一公司钻井32533队, 东营257237

宋宁，高级工程师，研究方向为油气田地质和有机地球化学，电子邮箱：songn@sohu.com

收稿日期: 2013-07-24

修回日期: 2013-11-08

网络出版日期: 2014-03-07

基金资助

国家自然科学基金项目（41172126）

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Geochemical Characteristics and the Group Division of Light Hydrocarbons in Crude Oil from Gaoyou Sag

SONG Ning ,
GUO Haiying ,
HOU Pengfei ,
YANG Shuaishuai ,
WANG Guangli ,
HU Jiandong

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1. School of Petroleum Engineering, Changzhou University, Changzhou 213016, China;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
3. Drilling Team 32533, Bohai Drilling Company 1, Shengli Oilfield, Dongying 257237, China

Received date: 2013-07-24

Revised date: 2013-11-08

Online published: 2014-03-07

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摘要

高邮凹陷是苏北盆地油气潜力最大的凹陷，对该凹陷马家嘴、黄珏、富民、永安等9大油田原油样品的C₆~C₇轻烃特征、Mango轻烃参数及轻烃对比、蚀变星图和成熟度参数展开系统对比研究。C₆~C₇轻烃中富含正己烷，苯相对含量低，正庚烷、甲基环己烷和二甲基环戊烷的相对含量相差不大，显示高邮凹陷原油母质类型为腐泥-腐殖型。Mango轻烃参数K₁平均值为0.97，表明高邮凹陷原油具有相似的沉积环境；上含油气系统的K₂较大，平均值为0.31，表明陆源输入较大；中含油气系统的K₂较小，平均值为0.22，表明水源输入较大，下含油气系统介于两者之间，K₂平均值为0.27。由轻烃星图对比、庚烷值和异庚烷指数显示，上含油气系统的成熟度高，保存条件好；中含油气系统原油成熟度低，受次生演化作用明显；下含油气系统原油处于成熟阶段。

关键词： 轻烃; 原油; 地球化学特征; 高邮凹陷; 群组划分

本文引用格式

宋宁 , 郭海莹 , 侯鹏飞 , 杨帅帅 , 王广利 , 胡建东 . 高邮凹陷原油轻烃地球化学特征及群组划分[J]. 科技导报, 2014 , 32(6) : 40 -44 . DOI: 10.3981/j.issn.1000-7857.2014.06.006

Abstract

Gaoyou sag has the greatest potential in oil and gas reserves in Subei Basin. This paper investigates the characteristics of C₆, C₇ light hydrocarbons from nine oilfields in Gaoyou sag, their Mango parameters, the transformation star diagram and maturity degree of crude oils, and makes comparisons among them. C₆ light hydrocarbon is rich in n-hexane, and relatively poor in benzene. Among the components of C₇ light hydrocarbon, the contents of n-heptane, methyl cyclohexane and dimethyl cyclopentane have little difference, indicating the organic matter sources are both sapropelic type and humic type. The average Mango parameter K₁ of the light hydrocarbons is 0.97, suggesting that the oils have similar sedimentary environments. The K₂ of the up petroleum system is large, averaging 0.31, indicative of large terrestrial input. The K₂ of the middle petroleum system is smaller, averaging 0.22, indicative of large water input. Comparison of the light hydrocarbons, their transformation star diagrams, heptane value, and isoheptane index indicate the up petroleum system is in high maturity and has good preservation conditions, while the middle petroleum system is in low maturity, and the down petroleum system is under the mature stage. The analysis of the crude oils in Gaoyou sag and their group division may provide help for oil and gas exploration in this area.

Key words： light hydrocarbons; crude oil; geochemical characteristics; Gaoyou sag; group division

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