鄂尔多斯盆地大牛地气田老区合理井网井距研究-天然气与石油.doc

鄂尔多斯盆地大牛地气田老区合理井网井距研究 耿燕飞1 韩校锋2 （1、中石化华北分公司第一采气厂采气研究所； 2、中石化华北石油工程有限公司测井分公司） 摘要:为了提高大牛地气田DK13井区采出程度和采收率，考虑该井区单井控制储量不均匀的特点,研究了该区的合理井网井距。分别用经济评价法、规定单井产量法、合理采气速度法、试井分析法、TOPAZE法、数值模拟法等七种方法进行论证，得出以经济极限井距为基础的技术合理井距，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。依据研究区沉积相及强非均质性特征，建议采用不规则井网，它有利于有效控制储层及天然气富集区、提高砂体钻遇率，也便于气田开发后期进行调整。 关键词: DK13井区；井网井距；经济极限井距；技术合理井距；不规则井网 Study on reasonable well pattern and spacing in old area of DND gas field,ordos basin Geng Yan-fei1 Han Xiao-feng2 (1、The frist Gas recovery factory of North China branch(Sinopec),Zhengzhou 4500002、ogging Company of North China Oil Field Engineering Company(Sinopec)，inxiang 453700,china ) Abstract：In order to improve the recovery degree and recovery efficiency of DK13 well area in DND gas field, considering the characteristics of uneven single well controlled reserves, we study reasonable well pattern and spacing in this area.Using seven method of Economic Evaluation, Regulations of single well production, reasonable gas recovery rate method, well test analysis, TOPAZE method, simulation and so on to prove, conclude that technical rational spacing between wells on the basis of economical ultimate interwell distance, Based on the study, we think that t it is reasonable that the technical rational spacing between wells is more than the economical ultimate interwell distance.On the basis of sedimentary facies and the characteristics of strong heterogeneity in study area, suggest that using irregular well pattern,it is advantageous to the effective control of Reservoir and enrichment area of gas, increase drilling ratio of sandbody, also easy to adjust the gas field of development later stage. Keywords: DK13 well areas; well pattern and spacing; economical ultimate interwell distance;technical rational spacing between wells; irregular well pattern 1 概况 大牛地气田位于陕西省榆林市与内蒙古自治区伊金霍洛旗、乌审旗交界地区，DK13井区位于大牛地气田的西南角，探明面积709.24km2，探明储量 939.37×108m3。DK13井区主要产气层位有二叠系下石盒子组山1、盒3段，山西组属于浅水辫状河三角洲平原沉积，石盒子组从盒1到盒3逐步由辫状河沉积转变为曲流河沉积，储集层砂体非均质性强，连片性差，储层平均孔隙度为7