乌鲁木齐河东矿区煤层气含气性及物性特征分析

Analysis of Gas Bearing Property and Physical Properties of Coalbed Mehtane in Urumqi Hedong Mining Area

与常规油气藏相比,煤层气藏具有其自身的特点。煤层气藏是一种自生自储的气藏,煤层既是烃源岩,也是储集岩。作为储层来说,煤层具有一些特殊的物理、化学性质和特殊的岩石力学特征,煤层气富集、成藏以及产出的过程是一个特殊的物理、化学过程,这是与常规油气藏重要的区别。乌鲁木齐河东矿区毗邻乌鲁木齐市区,矿区西端位于乌鲁木齐水磨沟区,中东部位于米东区,可以就近为城市生产生活供气,缓解目前天然气紧缺状况。乌鲁木齐矿区一带煤炭资源丰富,煤层气含量较高,同时,煤储层物性较好,有利于煤层气的赋存和开发。

Compared with conventional oil and gas reservoirs,coalbed methane reservoirs have their own characteristics.Coalbed methane reservoir is a kind of self generating and self storing gas reservoir.Coal seam is both source rock and reservoir rock.As a reservoir,coal seam has some special physical and chemical properties and special rock mechanical characteristics.The process of coalbed methane enrichment,accumulation and production is a special physical and chemical process,which is an important difference from conventional oil and gas reservoirs.Urumqi Hedong Mining Area is adjacent to the urban area of Urumqi,with the west end of the Mining Area located in Shuimogou District of Urumqi,and the middle and east part located in Midong District,which can supply gas for the production and living of the city nearby and ease the current shortage of natural gas.Urumqi Mining Area is rich in coal resources,and the gas content of coalbed methane is high.At the same time,the physical properties of coal reservoir are good,which is favorable for coalbed methane occurrence and development.