廊固凹陷原油成因类型与分布规律

doi:10.7623/syxb201711005

石油学报 ›› 2017, Vol. 38 ›› Issue (11): 1263-1274.DOI: 10.7623/syxb201711005

廊固凹陷原油成因类型与分布规律

操义军¹, 王权², 邹华耀¹, 刁帆¹, 林俊峰³, 张金峰⁴, 郭柳汐²

1. 中国石油大学地球科学学院北京 102249;
2. 中国石油华北油田公司勘探开发研究院河北任丘 062552;
3. 中国地质大学资源学院湖北武汉 430074;
4. 中国石油长庆油田公司第五采油厂陕西西安 710200

收稿日期:2017-05-01 修回日期:2017-09-08 出版日期:2017-11-25 发布日期:2017-12-08
通讯作者: 邹华耀,男,1963年12月生,1985年6月获江汉石油学院地质系学士学位,2002年获中国地质大学(武汉)矿产普查与勘探博士学位,现为中国石油大学(北京)教授、博士生导师,主要从事油气成藏机理教学与科研工作。Email:huayaozou@cup.edu.cn
作者简介:操义军,男,1988年1月生,2012年获长江大学学士学位,现为中国石油大学(北京)博士研究生,主要从事油气藏形成与分布规律研究。Email:caoyijun1988@126.com
基金资助:
国家自然科学基金重大项目（No.41690134）、国家自然科学基金项目（No.U1663210）和中国石油华北油田科技项目（HBYT-YJY-2014-JS）资助。

Genesis types and distribution laws of crude oil in Langgu sag

Cao Yijun¹, Wang Quan², Zou Huayao¹, Diao Fan¹, Lin Junfeng³, Zhang Jinfeng⁴, Guo Liuxi²

1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
2. Exploration and Development Research Institute, PetroChina Huabei Oilfield Company, Hebei Renqiu 062552, China;
3. Faculty of Earth Resource, China University of Geosciences, Hubei Wuhan 430074, China;
4. No.5 Oil Production, PetroChina Changqing Oilfield Company, Shaanxi Xi'an 710200, China

Received:2017-05-01 Revised:2017-09-08 Online:2017-11-25 Published:2017-12-08

摘要/Abstract

摘要：

基于34个烃源岩与50个原油样品的分子生物标志化合物分析结果，研究了廊固凹陷主要油田的原油成因类型与分布规律。分析结果表明，沙河街组三段下亚段与沙河街组四段上亚段烃源岩有不同的分子生物标志化合物组合特征：沙河街组三段下亚段烃源岩陆源有机质的输入量较高且富含沟鞭藻类，沉积于淡水较强的还原环境；沙河街组四段上亚段烃源岩陆源有机质输入量较少且低等水生生物输入较多，沉积于咸水强还原环境。在油源对比基础上，结合原油分子生物标志物参数进行聚类分析，划分了3种成因类型的原油。第Ⅰ类原油来自沙河街组四段上亚段烃源岩，主要分布于牛坨镇凸起周边地区；第Ⅱ类原油来自沙河街组三段下亚段烃源岩，主要分布在凹陷偏北部的旧州—王居一带；第Ⅲ类原油来自沙河街组三段下亚段烃源岩与沙河街组四段上亚段烃源岩生成的混源油，以沙河街组三段下亚段烃源岩生成的原油为主，主要分布在凹陷东部的河西务构造带和曹家务—柳泉构造带南部的部分地区。廊固凹陷各油藏紧邻烃源岩聚集成藏，其分布规律受控于不同层段烃源岩的发育与分布。曹家务和中岔口地区是第一类原油下一步的有利勘探目标区域，柳泉构造带王居地区是第二类原油勘探潜力较大区域。

关键词: 生物标志化合物组合, 油族划分, 油-岩对比, 原油分布, 廊固凹陷

Abstract:

Based on the analysis results of the molecular biomarkers of 34 source rocks and 50 crude oil samples, the crude oil genesis types and their distribution laws of main oil fields in Langgu sag are studied. The analysis results show that the source rocks in the Lower Member 3 and Upper Member 4 of Shahejie Formation have different molecular biomarker assemblage characteristics. The inputs of terrestrial organic matters of the source rocks in Lower Member 3 of Shahejie Formation are high with abundant dinoflagellates, which deposit in a fresh-water strong reducing environment; the inputs of terrestrial organic matters of the source rocks in Upper Member 4 of Shahejie Formation are low with high inputs of lower hydrobiont, which deposit in a saline-water strong reducing environment. Based on the oil-source correlation of molecular biomarker parameters of source rocks, in combination with multi-parameter cluster analysis on the molecular biomarkers of crude oil, crude oil is divided into three genesis types. Type-I crude oil is derived from source rocks of the Upper Member 4 of Shahejie Formation, mainly distributed in the surrounding regions of Niutuozhen uplift; Type-Ⅱ crude oil is originated from source rocks of the Lower Member 3 of Shahejie Formation, mainly distributed in the Jiuzhou-Wangju region of the northern sag; Type-Ⅲ crude oil is sourced from the mixed source oil generated in source rocks of the Lower Member 3 and Upper Member 4 of Shahejie Formation, dominated by the crude oil generated in the former member, mainly distributed in Hexiwu structural belt and some parts of the southern Caojiawu-Liuquan structural belt in the eastern sag. The oil reservoirs in Langgu sag are adjacent to source rocks for oil-gas accumulation, and their distribution laws are controlled by the source-rock development distribution in different horizons. Caojiawu and Zhongchakou regions are the next favorable target regions for crude oil exploration in the source rocks of Upper Lower 4 of Shahejie Formation in Langgu sag, while Wangju region in Liuquan structural belt has a great potential to explore crude oil in source rocks of the Lower Member 3 of Shahejie Formation.

Key words: biomarker assemblage, oil composition division, oil-rock correlation, crude oil distribution, Langgu sag

中图分类号:

TE122.1

操义军, 王权, 邹华耀, 刁帆, 林俊峰, 张金峰, 郭柳汐. 廊固凹陷原油成因类型与分布规律[J]. 石油学报, 2017, 38(11): 1263-1274.

Cao Yijun, Wang Quan, Zou Huayao, Diao Fan, Lin Junfeng, Zhang Jinfeng, Guo Liuxi. Genesis types and distribution laws of crude oil in Langgu sag[J]. Acta Petrolei Sinica, 2017, 38(11): 1263-1274.

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(收稿日期2017-05-01改回日期2017-09-08编辑宋宁)

廊固凹陷原油成因类型与分布规律

Genesis types and distribution laws of crude oil in Langgu sag

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