三元、超临界及氯仿抽提物有机地球化学特征对比——以渤海湾盆地东营凹陷沙四段为例

ORGANIC GEOCHEMICAL CHARACTERISTICS CONTRAST OF TERNARY, SUPERCRITICAL AND CHLOROFORM EXTRACTION-A CASE FROM THE FOURTH MEMBER OF SHAHEJIE FORMATION IN THE DONGYING SAG OF THE BOHAI BAY BASIN

刘四兵 朱建辉 沈忠民 杨曦

Liu Sibing Zhu Jianhui Shen Zhongmin Yang Xi

成都理工大学, 油气藏地质及开发工程国家重点实验室, 能源学院, 成都, 610059 2. 中国石油化工股份有限公司, 石油勘探开发研究院, 无锡石油地质研究所, 江苏, 无锡, 214151 3. 塔里木油田公司, 开发事业部, 新疆, 库尔勒, 841000

State Key Lab of Oil and Gas Reservoirs Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China 2. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China 3. Development Business Department of Tarim Oilfield Company, PetroChina, Kuerle, Xinjiang 841000, China

通过三元、超临界及氯仿抽提对渤海湾盆地东营凹陷古近系沙河街组四段下部的4个烃源岩样品进行了抽提量、族组分及色谱特征等分析和对比。抽提量对比研究表明:超临界抽提萃取能力较弱;三元抽提则具有相对较强的萃取能力,特别是在成熟度较高的烃源岩评价中,可能是一种相对有效的方法。族组分及色谱特征对比表明:三元抽提对中高碳数正构烷烃及杂原子化合物的萃取能力较强,其色谱特征与氯仿抽提物有较大区别;而超临界抽提对低分子量烃类萃取能力较强,其色谱特征与氯仿抽提物相似。

In the paper,the extractive contents,group components and chromatography of four source rock specimens in the lower part of the Fourth Member of Shahejie Formation of Paleogene,the Dongying Sag of the Bohai Bay Basin was analyzed,using the methods of the ternary extraction,supercritical extraction and chloroform extraction.The extractive contents showed that the capability of ternary extraction is higher than that of supercritical extraction,and ternary extraction may be a relative effective method especially in the evaluation of higher maturity source rock.The contrast of group components and chromatography characteristics showed that the capability of extracting middle-high carbon number n-alkanes and heteroatom-containing compounds by ternary extraction is higher than that of supercritical extraction and the chromatography characteristics of ternary extract is different from that of chloroform extraction,but the chromatography characteristics of supercritical extract is similar to that of chloroform extraction.

国家自然科学基金项目资助(40772804)

https://doi.org/10.11781/sysydz200901092