摘要
我国海陆过渡相页岩气资源丰富、分布范围广、资源潜力大,海陆过渡相页岩主要发育于石炭—二叠纪地层。上二叠统乐平组碳质页岩是昭通国家级页岩气示范区内重要的海陆过渡相页岩层系。为了评价昭通探区海陆过渡相页岩气的地质特征与资源潜力,根据钻井、录井、测井及实验分析资料,对该区乐平组富有机质页岩的基本地质特征等进行了研究,并与其他地区已获得良好海陆过渡相页岩气显示的页岩层系进行了对比分析。研究结果表明:(1)昭通探区乐平组海陆过渡相富有机质泥页岩非常发育,厚度较大、脆性矿物含量较高、物性条件较好、有机碳含量高、有机质热演化程度高、含气性较好,具备页岩气形成的有利地质条件;(2)优选出太阳—大寨地区和雄赫东区两个海陆过渡相页岩气有利区,初步确定有利区面积达466 km2,页岩气资源量近800×108 m3,可以作为该区下一步页岩气勘探的重点突破区域。结论认为,昭通探区海陆过渡相页岩气资源丰富并且具有良好的勘探开发前景,可以作为重要的后备突破层系之一。
In China,there are abundant transitional shale gas resources,whose distribution area is large and resource potential is huge.Transitional shale is mainly developed in the Carboniferous-Permian strata.The carbonaceous shale of Upper Permian Leping Formation is the important transitional shale formation in the Zhaotong National Shale Gas Demonstration Area.In order to evaluate the geological characteristics and resource potential of the transitional shale gas in Zhaotong exploration area,the Leping Formation organic-rich shale in this area was studied from the aspect of basic geological characteristics based on drilling,logging and experimental analysis data,and then compared with the shale formations with good shows of transitional shale gas in other areas.And the following research results were obtained.First,the Leping Formation transitional organic-rich shale in Zhaotong exploration area is well developed with larger thickness,higher brittle mineral content,better physical properties,high total organic carbon,high organic thermal evolution degree and better gas-bearing property,so it has favorable geological conditions for the formation of shale gas.Second,two favorable transitional shale gas areas are selected,namely Taiyang-Dazhai area and Xionghe East area.It is preliminarily determined that their area is 466 km2 and the amount of shale gas resource is nearly 800×108 m3.And they can be taken as the next key breakthrough zones in the Zhaotong National Shale Gas Demonstration Area.In conclusion,there are abundant transitional shale gas resources in Zhaotong exploration area and their exploration and development prospect is promising,so it can be taken as one of the important reserve breakthrough formations.
作者
尹开贵
张朝
单长安
饶大骞
李庆飞
高燕
YIN Kaigui;ZHANG Zhao;SHAN Chang'an;RAO Daqian;LI Qingfei;GAO Yan(PetroChina Zhejiang Oilfield Company,Hangzhou,Zhejiang 310023,China;School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2021年第S01期30-35,共6页
Natural Gas Industry
基金
国家科技重大专项“昭通页岩气勘探开发示范工程”(编号:2017ZX05063)
中国石油天然气集团有限公司重大现场试验项目“深层页岩气有效开采关键技术攻关与试验”(编号:2019F-31)
中国石油天然气集团有限公司重大现场试验项目“井下光纤智能监测技术现场试验”(编号:2020F-44)
关键词
昭通国家级页岩气示范区
海陆过渡相
页岩气
碳质页岩
岩性特征
有机地化特征
物性特征
资源潜力
Zhaotong National Shale Gas Demonstration Area
Transitional facies
Shale gas
Carbonaceous shale
Lithologic characteristics
Organic geochemical characteristics
Physical property characteristics
Resource potential
