特种油气藏2018，Vol.25Issue(1)：5-10,6.DOI:10.3969/j.issn.1006-6535.2018.01.002
临兴地区上古生界煤系烃源岩评价及排烃特征
Evaluation on Upper Paleozoic Coal-Bearing Source Rocks and Hydrocarbon Expulsion Feature in Linxing Region
摘要
Abstract
The Linxing region is at initial development stage. We are not much clear about the Upper Paleozoic coal-bearing source rock features and hydrocarbon expulsion rule,which has restrained exploration and development of this region. By combining well logging and laboratory test data,we thoroughly studied the distribution,geochemical features,hydrocarbon expulsion rule of coal-bearing source rocks and their controlling effect on hydrocarbon accu-mulation in this region. According to the study results:(1)the source rocks in this region are coal beds,dark mudstone and carbonaceous mudstone in the Taiyuan Formation-Shanxi Formation,with moderate-good organic matter abundance;(2)being influenced by sedimentary environment,the major organic matter is typeⅢ,with fe-wer type Ⅱ1and type II2. TypeⅡ1organic matter is only developed in the Taiyuan Formation;(3)from the Taiyuan Formation to the Shanxi Formation,the ratio of type III organic matter increases,and that of type II decrea-ses;(4)being affected by the Zijinshan alkali complex rocks,the organic matter is at high-mature and over-ma-ture stages,with gas generation intensity of more than 20×108m3/km2;(5)hydrocarbon generation intensity in this region is characterized by being higher in its west and north and lower in its east and south,and being exten-sive;(6)hydrocarbon generation intensity controls gas reservoir scope;(7)the hydrocarbon expulsion efficiency and total hydrocarbon expulsion quantity of the Taiyuan Formation are better than that of the Shanxi Formation,thus the Taiyuan Formation contributes more to the Upper Paleozoic gas reservoirs. This study has deepened our system-atic cognition on the Upper Paleozoic coal-bearing source rocks in the Linxing region,and provides important refer-ence for coal-bearing tight sandstone gas migration,accumulation,exploration and development in this region.关键词
煤系烃源岩/烃源岩特征/排烃规律/上古生界/临兴地区Key words
coal-bearing source rock/source rock feature/hydrocarbon expulsion rule/Upper Paleozoic/Linxing region分类
能源科技引用本文复制引用
刘玲,王烽,汤达祯,许浩..临兴地区上古生界煤系烃源岩评价及排烃特征[J].特种油气藏,2018,25(1):5-10,6.基金项目
中央高校基本科研业务费专项基金"鄂尔多斯盆地东缘康宁地区致密砂岩气成藏规律研究"(2652015330) （2652015330）
