南华北地区上古生界烃源岩异常热演化因素探讨  

Reasons for abnormal thermal evolution of source rocks in Upper Paleozoic,southern North China

作　　者：程喆 徐旭辉[1] 王荣新[2] 武明辉[1] 辛藜莉[3] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]中国石油化工股份有限公司河南油田分公司石油勘探开发研究院,河南南阳473132 [3]西南石油大学石油工程学院,成都610500

出　　处：《石油实验地质》2011年第2期142-147,共6页Petroleum Geology & Experiment

基　　金：全国油气资源战略选区调查与评价项目(XQ-2007-02)

摘　　要：南华北地区上古生界分布广泛,烃源岩厚度稳定,有机质丰度高,多为Ⅱ2—Ⅲ型。经历印支、燕山、喜山等多期差异性构造运动改造,致使烃源岩热演化程度参差不齐,这是南华北地区油气资源评价与勘探选区中至关重要的参数。从南华北地区上古生界烃源岩热演化特征入手,通过对造成上古生界烃源岩热演化异常的因素分析,认为南华北地区上古生界烃源岩异常热演化以深成热变质作用为主,中生代普遍发生的地壳热隆升造成了上古生界烃源岩热演化具有南北分区的特点,中生代以来的岩浆作用是造成局部地区热演化程度较高的根本原因,区域动力变质作用及重力滑动作用对热演化具有一定的促进作用。南华北地区上古生界有效油气资源分布于围绕现今高演化区的边缘带,即洛阳伊川—巨陵襄城—鹿邑—谭庄沈丘—倪丘集—颜集等地区,是南华北地区上古生界油气勘探的有利地区。The Upper Paleozoic is widely distributed in southern North China with thick source rock and high organic abundance, mainly Ⅱ 2 - Ⅲ type. Multiple stages of deformation during Indosinian, Yanshanian and Himalayan resulted in the differences in thermal evolution degree between source rocks, which was the key factor for petroleum resource evaluation and exploration target identification in south ern North China. Based on thermal evolution characteristics of source rocks in the Upper Paleozoic of the study area, the reasons for abnormal thermal evolution were found out, mainly hypozoic thermal metamorphism. Crust uplift during Mesozoic resulted in the south and north division of thermal evolution of source rocks in the Upper Paleozoic. Magmatism ever since Mesozoic was the root cause for re gional high degree thermal evolution. Regional dynamometamorphism and gravitational sliding also helped thermal evolution. Industrial petroleum resources in the Upper Paleozoic are mainly found around the edge of high thermal evolution zone, such as Yichuan of Luoyang--Xiangcheng of Juling Luyi--Shenqiu of Tanzhuang--Niqiuji Yanji. They are the regions favorable for Upper Paleozoic pe troleum exploration in southern North China.

关 键 词：烃源岩 热演化 构造热事件 上古生界 南华北 

分 类 号：TE122.11[石油与天然气工程—油气勘探]