The Optimum Selecting of Shale Gas Well Location for Geological Investigation in Niutitang Formation in Lower Cambrian, Northern Guizhou Area
详细信息
- 责任者：Han Shuangbiao (Energy and Resources School ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Jinchuan
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(1)
- 关键词：页岩气 ; shale gas ; 贵州 ; Guizhou Province
- 页码：p.182-187
- 图表：illus., 17 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
The paper systematically investigated the shale outcrops and profiles of Niutitang Formation in Lower Cambrian in Northern Guizhou Province,and a series of experiments of organic geochemistry,mineral composition,capacity of gas storage,porosity and permeability were conducted.The results show that,the shale of Niutitang Formation in Lower Cambrian has a stable distribution and favorable buried depth in Cengong-Shiqian-Tongren areas,and its thickness varies from 40 to 60 meters,the TOC is higher than 2.5%.The thermal evolution of organic matter is generally high,which indicates that the shale is in the stage of maturation to over maturation.The black shale contains an average of 2.74 cubic meters adsorption gas per ton.The TOC and clay mineral obviously impacted the gas potential,which was regularly changed in the profile.The Cenye 1 well was located and the well drilling was conducted in Yangqiao of Cengong area.The completion depth of Cenye 1 well is 1 526m and the black shale of Niutitang Formation in Lower Cambrian has been revealed for a total thickness of 53 meters,which enriched in carbon.What’s more,the shale gas anomalies were monitored.