石油与天然气地质 ›› 2011, Vol. 32 ›› Issue (3): 448-458.doi: 10.11743/ogg20110318

• 石油与天然气地质 • 上一篇    下一篇

华北-东北地区海相层系烃源特征与战略选区

  

  • 出版日期:2011-06-28 发布日期:2011-09-23

Source rock characteristics and potential plays of marine sequences in North and Northeast China

  • Online:2011-06-28 Published:2011-09-23

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990

被引次数

7

摘要：

摘要：通过大量露头、钻井样品的测试分析，初步落实了冀北中-新元古界、华北南缘下寒武统、鄂尔多斯盆地西南缘中奥陶统优质烃源岩的分布。冀北中-新元古界优质烃源岩主要分布在蓟县系洪水庄组下部，华北南缘下寒武统优质烃源岩主要发育在辛集组（或雨台山组）底部，鄂西南中奥陶统较好烃源岩主要发育在平凉组下部，它们均以黑色泥页岩为主要特点。同时指出，华北台内奥陶系马家沟组碳酸盐岩是一套总体较差的烃源岩；上古生界石炭-二叠系煤系烃源岩以南华北地区发育条件最为优越，比鄂尔多斯、渤海湾盆地多发育了上、下石盒子组含煤层系。综合运用多种分析测试技术，对东北地区上古生界进行了变质相区划，初步认为二连盆地中西部、松辽盆地东南部是上古生界发育未变质潜在烃源岩的主要地区。综合评价认为，鄂尔多斯盆地西南缘是古生界油气突破的有利地区，华北南部是进一步探索上古生界煤成油气的有利地区，冀北中-新元古界、东北上古生界是值得进一步研究探索的新领域。

关键词: 关键词：海相层系, 烃源特征, 变质相, 战略选区, 华北-东北地区

Abstract:

Abstract: Based on outcrop observations and core sample analysis,we make a preliminary study of the distribution of quality source rocks in the Middle and Upper Proterozoic in northern Hebei province,the Lower Cambrian in the sorthern margin of North China and the Middle Ordovician in southwestern margin of Ordos Basin. Quality source rocks in the Middle and Upper Proterozoic in northern Hebei province are mainly distributed in the lower part of the Hongsuizhuang Formation in the Mesoproterozoic Jixian System;quality source rocks in the Lower Cambrian in the northern margin of North China are mainly distributed in the base of the Xinji Formation(or the Yuhuatai Formation);quality source rocks in the Middle Ordovician in southwestern margin of Ordos Basin are mainly distributed in the lower part of the Pingliang Formation. They are all dominated by black mudstone/shale. We think that carbonates in the Ordovician Majiagou Formation in intra North China platform is poor source rocks as a whole. The southern part of North China is better for the development of coalrelated source rocks in the PermoCarboniferous than Ordos Basin and Bohai Bay Basin,since the former has the coalbearing Upper and Lower Shihezi formations but the latter ones do not have. Considering of metamorphism,we examine the Upper Paleozoic in Northeast China and conclude that source rocks without metamorphism are mainly distributed in the middle and western parts of Erlian Basin and the southeastern part of the Songliao Basin. In conclusion,we think that 1)southwestern margin of Ordos Basin is favorable to explore conventional oil/gas;2)southern part of North China is favorable to discover coalderived oil/gas in the Upper Paleozoic;3)the Middle and Upper Proterozoic in northern Hebei province and the Upper Paleozoic in Northeast China are frontiers that are worthy of further research and exploration.

Key words:  , Key words： marine sequence,source rock characteristics,metamorphism,play screening,North and Northeast China