大涝坝凝析气田巴什基奇克组储层隔夹层封隔作用初探

Initial understanding of isolation of interlayer in Bashijiqike Formation of Dalaoba Condensate Gas Field

吕萍 姚田万 何云峰 马海虎 任宏 张奎

Lü Ping Yao Tianwan He Yunfeng Ma Haihu Ren Hong Zhang Kui

中国石油化工股份有限公司 西北油田分公司 雅克拉采气厂,新疆 库车 842017

Yakela Gas Production Plant, SINOPEC Northwest Oilfield Company, Kuqa, Xinjiang 842017, China

利用测井资料识别和划分了大涝坝巴什基奇克组凝析气藏低渗砂泥岩隔夹层，并通过建立隔夹层的测井识别标准来描述其展布规律。研究发现巴什基奇克组气藏受沉积环境的控制，其西南部主要发育Ⅰ2型泥岩隔夹层，厚度小，连续性差；东部主要发育Ⅱ2型物性隔夹层，厚度大，分布相对稳定。根据MDT测井压力资料、生产井见水时间及气水倒置关系验证巴什基奇克组气藏隔夹层的封隔效果，初步判断巴什基奇克组气藏2种类型隔夹层均具有封挡流体的作用，证实了该气藏为边水而非底水凝析气藏。

Thin sandstone and mudstone interlayers with low permeability were identified and classified in the Bashijiqike Formation of the Dalaoba Condensate Gas Field based on well logging data. Standards for well logging identification were established to describe the spatial distribution features of interlayers. Gas pools in the Bashijiqike Formation were controlled by sedimentary environment. In the southwest, mudstone interlayers of type Ⅰ2 developed, characterized by small thickness and poor continuity. In the east, physical interlayers of type Ⅱ2 developed, characterized by big thickness and stable distribution. According to MDT logging pressure data, production well water breakthrough time and gas/ water inversion relationship, the sealing capacity of interlayers in the Bashijiqike Formation was judged. Both of the two types of interlayers were proved capable for sealing. The gas pools were condensate ones with boundary water rather than bottom water.

https://doi.org/10.11781/sysydz2013S1019