鄂尔多斯盆地天然气勘探开发形势分析

鄂尔多斯盆地天然气远景资源量超过10万亿m^3，1989年以来先后发现靖边、榆林、乌审旗、苏里格和大牛地等5个大气田，探明天然气地质储量1．2万亿m^3，已进入储量快速增长阶段，近4年探明储量年均增幅超过2000亿m^3。已开发的靖边气田按年产54亿m^3规模可稳产至2008年，稳产末期递减率为12％；榆林气田稳产能力较强，年产20亿m^3可稳产至2014年。待开发的苏里格气田气井产能低，产量递减快，按低成本开发的技术路线，可望2010年建成10亿m^3的产能。靖边潜台东侧、榆林气田周边、子洲清涧等地区是储量升级的地区，府谷一佳县、宜川黄龙、靖边气田西南侧和西缘断褶带是增储上产的主要新区，通过努力，两类地区可新增探明储量5000亿～6000亿m^3，为2010年年产气135亿～150亿m^3奠定基础。图2参9

Natural gas exploration and development situation in Ordos Basin, NW China

The perspective reserves in Ordos Basin are more than 10×1012m3. Since 1989, 5 gas fields, Jingbian, Yunlin, Wushenqi,Sulige and Daniudi Gas Fields, have been discovered successively. The proven natural gas reserves reach 1.2×1012m3. At present, the natural gas exploration in the Ordos basin has come into a rapidly expanding period, and the average annual increase of the proven gas reserves has been more than 2000×108m3 for the latest 4 years. Jingbian Gas Field can keep an annual output of 54×108m3 until 2008, with a decline rate of 12% in the late stable production period. South Yunlin Gas Field, with a better capability of stable production, can keep an annual output of 20×108m3 until 2014. The undeveloped Sulige Gas Field, with a low well production and a high decline rate, can establish an annual output capability of 10×108m3 in the near future. The east Jingbian Buried Platform, the circumference of Yunlin Gas Field, and the Zizhou-Qingjian zone are the reserves upgrading areas. Fugu-Jiaxian, Yichuan-Huanglong, the southwest side of Jingbian Gas Field and the bruchfalten zone on the west edge of the basin are the main new areas for reserves and production increase. The new gain of proven reserves in the reserves upgrading areas and the 4 new areas can reach 5000×108-6000×108m3, which lays the foundations for the 135×108-150×108m3 annual output in 2010