乌连戈伊气田开发实践和经验

乌连戈伊是俄罗斯最大的巨型气田，也是世界最大的天然气田。该气田构造面积4000 km2，探明天然气地质储量11.2×1012m3，含气井段长达3000 m，纵向上有5套含气层系。1978年上部赛诺曼组高产气藏优先投入开发，高峰产量达到2765×108m3/a，相当于俄罗斯当时全国天然气产量的50％。２０世纪末，赛诺曼组气藏进入产量递减期，而深部阿奇莫夫超高压凝析气藏准备投入开发，弥补了产量递减，延长了气田稳产年限，开发经济效益十分明显。该气田成功地采用一套高效的开发和开采工艺技术,包括：分阶段分块方案设计、分期分块投产、方案及时调整；丛式井组布井方式；高产气井大直径的井身结构；超大规模处理能力的天然气处理厂；气田动态监测系统以及巨型气田稳产策略等。25年的开发实践表明，该巨型气田采用的开发和开采技术是合理有效的，对类似大型气田开发具有重要的借鉴作用。

DEVELOPMENT PRACTICE AND EXPERIENCE OF URENGOY GAS FIELD 1)

Urengoy is the largest giant gas field in Russia, as well as one of the largest gas fields in the world. The structural area of the gas field is 4000 km2 . Its proven gas in place is 11.2×1012 m3. The total gas intervals reache to 3000 m. There are 5 gas zones in the profile. The high production gas reservoir of Senoman group at the top section was first put into production in 1978. The peak production reached to 276.5×109 m3/a., which accounted for 50% of Russian gas production at that time. The Senoman gas reservoir entered the period of production decline in the end of 20 century. As Aqimuf condensate gas reservoir with abnormal high pressure at deeper section was put into production, the production decline was made up. The stable production period of the gas field was prolonged. The obvious economic benefit was achieved. A set of high efficient development and exploitation techniques are successfully applied in the gas field including the development programs are designed on stages and blocks; the different blocks are put into production at different stages; the programs are adjusted timely; the cluster well pattern is used; the well structure with large diameter is applied for high productive gas wells; the gas processing plant with super processing capacity is built; the monitoring system of the gas field performance and the strategy of stable production for the giant gas field are made; etc. 25 year's practice shows the development and exploitation techniques used in the giant gas field  are reasonable and effective, which provides important reference for development of similar large gas fields.