升平气田火山岩气藏井网井距研究  

STUDY ON PATTERN WELL SPACING OF VOLCANIC GAS RESERVOIR IN SHENGPING GAS FIELD

作　　者：周学民[1] 郭平[2] 黄全华[2] 彭彩珍[2] 汪周华[2] 

机构地区：[1]中国科学院渗流流体力学研究所 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学

出　　处：《天然气工业》2006年第5期79-81,共3页Natural Gas Industry

摘　　要：升平气田的储集层为中孔低渗火山岩,由于火山岩的特殊性,目前国内外关于火山岩气藏井网井距研究的相关报道较少,因此如何合理确定火山岩气藏井网井距对于保证升平气田开发取得最佳开发效果和经济效益具有重要意义。此次研究从地质、气藏工程、数值模拟角度探讨了升平气田井网井距的确定,分别按照经济评价方法、定单井产能法、合理采气速度法、丰度计算法计算了其极限井距和技术合理井距,并以经济评价方法为基础确定该气藏的合理井距。研究认为只要技术合理,井距不低于其经济极限井距都是可行的。同时建议对升平气田实施非均衡开采,在相对高渗透层采用密井以获得高产,在低渗透层采用稀井以保证整个气藏开发的经济效益。最后结合数值模拟结果综合确定升深1井区采用1400m井距、升深2井区采用1000m井距。The reservoir of Shengping gas field is volcanic formations with medium porosity and low permeability. Since volcanic reservoirs are few in the world, there are few documents about the study of pattern well spacing of volcanic gas reservoirs at home and abroad now. How to determine the pattern well spacing of volcanic gas reservoirs is very important for Shengping gas field to get the optical development results and economic benefit. The study explores how to determine the pattern well spacing of Shengping gas field based on geology, gas reservoir engineering and numerical simulation. The limiting well spacing and the reasonable technical well spacing are calculated respectively according to the economic assessment method, the fixed single-well productivity method, the reasonable gas recovery rate method, and the abundance calculation method. The reasonable well spacing of the gas field is determined on the basis of the economic assessment method. The study finds it is feasible so long as the reasonable technical well spacing is no less than the economic limiting well spacing. Also, it is suggested the non-equilibrium exploitation method is conducted in Shengping gas field. The smaller well spacing is used for exploitation of the zones with high permeability to achieve high production. The bigger well spacing is used for exploitation of the zones with low permeability to guarantee the economic benefits of development of the whole gas field. Finally, with the results of numerical simulation, it is comprehensively determined that 1400 m of well spacing should be used for the block of Well Shengshen 1, and 1000 m of well spacing should be used for the block of Well Shengshen 2.

关 键 词：火山岩油气藏 低渗透油气藏 井网 开采 开发方案 经济效益 

分 类 号：TE324[石油与天然气工程—油气田开发工程]