许亚坤, 张鹏, 王昆.永夏煤田山西组煤系非常规气成藏条件与勘探潜力分析[J].河南理工大学学报（自然科学版）,2020,39(2):38-46.

XU Y K, ZHANG P, WANG K.Analysis on forming conditions and exploration potential of unconventional gas incoal measures reservoir in Shanxi formation of Yongxia coalfield[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(2):38-46.

永夏煤田山西组煤系非常规气成藏条件与勘探潜力分析

许亚坤, 张鹏, 王昆

河南省地质矿产勘查开发局第四地质矿产调查院，河南商丘476000

摘要:以煤田地质钻探、测井、录井资料为基础，结合岩石学分析、有机地球化学分析、压汞实验、岩电实验、等温吸附测试等，对研究区非常规气的成藏条件和勘探潜力进行了探讨。研究表明：泥岩平均有机碳含量大于1%，有机质成熟度1. 69% ~2. 33%，处于成熟—过成熟阶段，主要干酪根类型为 Ⅲ 型，显微组分以壳质组为主，惰质组最少，正处于生气高峰期；储层类型为低孔特低渗型，有利于气体储集，且砂岩储层矿物成分以石英为主，泥岩多夹杂粉砂岩、泥质砂岩，脆性矿物含量高；煤层平均含气量14.35 m³/t，砂泥岩平均含气量0.47 m³/t，估算区内非常规气资源量约1 634.23× 10 ⁸ ~2 819.77 × 10 ⁸ m³，对比邻近区块牟页1井和美国主要页岩气产地，均表明研究区具备非常规气形成的基本条件。

关键词:永夏煤田;山西组;煤系非常规气;成藏条件;勘探潜力

doi:10.16186/j.cnki.1673-9787.2020.2.6

基金项目:河南省”两权价款”地质科研攻关项目（2016-7 ）

收稿日期:2019/06/17

修回日期:2019/07/28

出版日期:2020/03/15

Analysis on forming conditions and exploration potential of unconventional gas incoal measures reservoir in Shanxi formation of Yongxia coalfield

XU Yakun, ZHANG Peng, WANG Kun

No. 4 Institute of Geological and Mineral Resources Survey， Henan Bureau of Geo-exploration & Mineral Development， Shangqiu 476000 ， Henan， China

Abstract:Based on the data of geological drilling， well logging and mud logging in coalfield， the accumulation conditions and exploration potential of unconventional gas in the study area were discussed， combined with the petrologic analysis， organic geochemical analysis， mercury injection experiments， rock electricity experiments and isothermal adsorption tests. The results revealed that the average organic carbon content of the mudstone was more than 1 % ， and the maturity of organic matter was 1.69% ~ 2. 33% ， which was in the stage of maturity-over maturity. The main kerogen belonged to type Ⅲ， the main macerals were exinite， and the least was inertinite ，which was in the peak of gas generation. It showed low-porosity and super-low permeability in the reservoir ，which was conducive to gas accumulation. The mineral composition of sandstone reservoir was mainly composed of quartz， and mudstone was generally mixed with siltstone and pelitic siltstone， the high content of brittle minerals. The average gas contents of the coal seam and sand mudstone were 14. 35 m³/t and that of sandstone and mudstone was 0. 47 m³/t，and the estimated unconventional gas resource in the area was about 1 634.23 × 10⁸ ~2 819.77 ×  10⁸ m³. Compared with the well of Mouye 1 in the adjacent block and the main shale gas producing area in the United States， it could be concluded that the study area had basic conditions for the formation of unconventional gas.

Key words:Yongxia coafield;Shanxi formation;unconventional gas in coal measures;reservoir forming condition;

永夏煤田山西组煤系非常规气成藏条件与勘探潜力分析_许亚坤.pdf