南华北盆地禹州地区ZK0606钻孔上古生界煤系烃源岩评价  

The evaluation of Upper Paleozoic hydrocarbon source rocks of ZK0606 in Yuzhou region at southern North China Basin

作　　者：邢舟[1] 曹高社[1,2] 毕景豪 周新桂 张交东 Xing Zhou;Cao Gao-she;Bi Jing-hao;Zhou Xin-gui;Zhang Jiao-dong(Institute of Resources ＆ Environment , Henan Polytechnic University ,Jiaozuo 454000,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Province , J iaozuo 454000 ,China;Oil ＆Gas Survey Center ,China Geological Survey ,Beijing 100029 ,China)

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]中原经济区煤层(页岩)气河南省协同创新中心,河南焦作454000 [3]中国地质调查局油气资源调查中心,北京100029

出　　处：《天然气地球科学》2018年第4期518-528,共11页Natural Gas Geoscience

基　　金：全国油气资源战略选区调查与评价(编号:1211302108023-2)资助

摘　　要：南华北盆地禹州地区上古生界含煤地层具有良好的非常规油气勘探前景,但对该地区潜在烃源岩缺少系统的评价。研究选取禹州地区上古生界揭露较全的全取心ZK0606钻孔,对上古生界煤岩、泥岩和碳酸盐岩系统地取样,并进行有机碳、岩石热解、氯仿沥青"A"、有机显微组分、镜质体反射率和干酪根碳同位素分析。结果表明:禹州地区ZK0606钻孔上古生界烃源岩不仅包括煤岩和泥岩,碳酸盐岩也可作为潜在烃源岩;纵向上,烃源岩主要分布于太原组和山西组下部,较为连续,山西组上部、下石盒子组烃源岩主要分布在煤层(线)附近,控制厚度较小,上石盒子组基本不发育烃源岩,烃源岩纵向上的分布规律主要与晚古生代的海侵作用有关;ZK0606钻孔上古生界煤岩和泥岩烃源岩有机质类型为Ⅲ型,碳酸盐岩有机质类型也为Ⅲ型,明显有别于一般碳酸盐岩的有机质类型,此与该区碳酸盐岩特殊的沉积环境有关;ZK0606钻孔上古生界烃源岩热演化程度达到成熟—高成熟阶段,具有随深度增加而逐渐增大的趋势,较高的热演化程度可能与该区较高的地温梯度有关。根据烃源岩的基本特征,结合煤层气和页岩气的评价方法,山西组二1煤及其上下部的泥岩应是煤层气和页岩气最主要的勘探目的层,白沙向斜的南东侧应是重点勘探的区域。The Upper Paleozoic coal-bearing strata in Yuzhou good exploration potential for unconventional hydrocarbon r potential source rocks is indispensable.This study Upper Paleozoic,systematically collected samples region at southern North China Basin have eservoirs, therefore systematic eval of selected full core hole ZK0606 which perfectly revealed of coal rocks,mudstones and carbonate rocks of Upper Paleozoic,and analyzed the samples to obtain the parameters of TOC, hydrocarbon generation chloroform bitumen ＂A＂, organic maceral, vitrinite reflectance and kerogen carbon isotopes. T show that coal rocks,mudstones and carbonate rocks are all possibly potential source rocks in Paleozoic.Vertically the source rocks are continuous in Taiyuan Formation and the lower part pot est the of ential, results Upper Shanxi Formation,mainly distribute in the nearby coal bed with small thickness in the upper part of Shanxi For- mation and Xiashihezi Formation, seldomly in the Shangshihezi Formation.The vertical distributional regu- larity of source rocks is mainly related to Irate Paleozoic transgression.The kerogen type of coal rocks and mudstones are type m ,but the carbonate rocks are also mainly type Ⅲ ,apparently different from the gen- eral carbonate rocks,this abnormal phenomenon mainly attributes to the special sedimentary environment of the carbonate rocks. The thermal evolution degree of Upper Paleozoic source rocks of ZK0606 has reached mature-highly mature stage,and Ro increased gradually by depth.The higher degree of thermal e- volution may relate to the higher paleogeothermal gradient in this area. According to the essential charac teristics of source rocks and the evaluation methods of coal-bed methane and shale gas, the Ⅲcoal layer and its upper and lower mudstone of Shanxi Formation are the main target layers of coal-bed methane and shale gas exploration,and the southeast part of Baisha syncline is a key exploration area.

关 键 词：上古生界 烃源岩 煤层气 页岩气 评价 禹州地区 

分 类 号：TE122.1[石油与天然气工程—油气勘探]