成都理工大学学报（自然科学版）2012，Vol.39Issue(2)：198-205,8.
苏北地区下寒武统幕府山组页岩气勘探前景
Shale-gas exploration prospect of Lower Cambrian Mufushan Formation in the northern Jiangsu, China
摘要
Abstract
Based on the geological surveys in the field, core observation, historical well re-examination, analysis and testing, simulation experiment etc. , this paper analyses the organic geochemistry characteristics, reservoir characteristics and gas-bearing features of the rich-organic matter shale in Lower Cambrian Mufushan Formation of northern Jiangsu. The rich-in organic matter shale develops in the lower part of Mufushan Formation and is shelf-basin facies with a cumulative thickness generally of 50～200 m. The top depth is generally 2. 5～4 km. The main kerogen types are Ⅰ and Ⅱ1. The shale has a high organic matter abundance. The an average of TOC is 3. 32% and the maximum TOC is 12. 1%. In the high heat evolutionary stage, the equivalent vitrinite reflectance is 0. 73% ～3. 01% and averages 2. 83%. The shale contains abundant clay minerals and quartz and a small amount of K-feldspar and gypsum. The main compositions of clay minerals are illite and I/S mixed layer, but the clay minerals do not contain smectite. Micropores and microcracks develop well in the shale reservoir. The isothermal adsorption simulating experiment shows that the shale has good gas absorbed capacity. It is estimated that the average shale-gas (free and absorbed gas) content of Mufushan Formation in the northern Jiangsu is 1. 4 m3/t, and the shale-gas resources amount is 1. 8× 108m3/km2, which indicates a great shale-gas resources potential. According to the preliminary prediction, the favorable areas for shale-gas exploration of Mufushan Formation in northern Jiangsu are mainly distributed from Quanjiao in Anhui Province to Liuhe in Jiangsu Province and over the Yangzhou-Gaoyou-Xinghua area in Jiangsu Province.关键词
页岩气/等温吸附/资源潜力/幕府山组/苏北地区Key words
shale-gas/ isothermal adsorption/ resources potential/ Mufushan Formation/ northern Jiangsu分类
能源科技引用本文复制引用
刘小平,潘继平,刘东鹰,段宏亮,董清源,董谦,章亚,孙雪娇..苏北地区下寒武统幕府山组页岩气勘探前景[J].成都理工大学学报（自然科学版）,2012,39(2):198-205,8.基金项目
国土资源部全国油气资源战略选区调查与评价专项(2009GYXQ15) （2009GYXQ15）
