长庆天然气勘探取得的突破

HAVING MADE A BREAKTHROUGH IN NATURAL GAS EXPLORATION AT CHANGQING

鄂尔多斯盆地油气资源丰富 ,目前已累计探明天然气地质储量 1 18× 10 12 m3 ,成为了中国第一个天然气探明储量超过万亿立方米的大气区。长庆油田作为盆地勘探的主体 ,在 30余年的天然气勘探历程中 ,经历曲折和挫折 ,终于取得了令人瞩目的突破。靖边下古生界气田 (长庆气田 )的发现 ,即是解放思想 ,重新认识 ,改变构造成藏的认识 ,提出风化壳古地貌成藏认识的结果 ;榆林气田和苏里格气田的探明 ,则是解放思想 ,提出上古生界大面积含气背景下 ,存在高渗储层而坚持勘探的成果。天然气勘探取得突破是勘探者解放思想 ,对盆地特征重新认识 ,应用勘探新理论 ,改变勘探思路的结果。

E'erduosi Basin is rich in oil and gas resources,the acumulative proved gas geological reserves in the basin is 1.18×10 12 m 3 at present and it has become the first giant gas province with proved gas reserves of more than one thousand billion in China.Through overcoming a great deal of complications and setbacks in natural gas exploration during over 30 years,an important breackthrough has been finally obtained at Changqing Oil Field where has been taking as the main exploration region in the basin.The discovery of Jingbian Lower Paleozoic gas field (Changqing Gas Field is the result of emancipating the mind and recognizing again,i.e.changing the cognition of reservoir formation by structural traps and putting forward an idea of reservoir formation by weathering crust palaeogeomorphologic traps;and the verification of Yulin and Sulige gas fields is the result of insisting on exploration through emancipating the mind and considering the existence of high-permeability reservoir beds under the background of large gas-bearing area in Upper Paleozoic.Therefore,the breakthrough in natural gas exploration at Changqing is the results of emancipating the mind,recognizing basinal features again,applying new exploration theories and changing exploration ideas.