阜康矿区西部构造运动作用下煤储层渗透率分布特征

发布时间：2018-03-21 20:48

本文选题：构造运动　切入点：渗透率　出处：《煤田地质与勘探》2017年06期 　论文类型：期刊论文

【摘要】：查明小范围内煤储层渗透率分布特征,可为合理井网部署、科学预测煤层气产能提供重要保障。对新疆阜康矿区西部煤岩层节理进行观测、统计和配套,获得了燕山晚期、喜马拉雅早期和喜马拉雅晚期3期构造应力场的主方向。结合构造运动反演法和煤层受力差异得出了研究区多期构造运动作用后14个块段内煤体结构及煤层的渗透率分布特征。结果表明:受多期构造运动作用影响,小范围内A2煤储层渗透率非均质性强,位于向斜核部扬起端埋深较浅处的煤层,煤体结构以碎裂原生结构煤为主,渗透性最好;东北部风氧化带以深及南翼块段,煤层变形较弱,煤层渗透率中等;向斜核部埋深较深部位受多期构造运动影响较大,煤体变形较严重,以碎粒糜棱煤为主,渗透性差;南部及西北部,受多期构造运动作用影响最大,煤层渗透性最差。钻井取心及渗透率实测资料验证了预测结果的准确性,此研究方法为多期构造影响下的小范围内煤层渗透率预测提供了一种思路和借鉴。
[Abstract]:Finding out the permeability distribution characteristics of coal reservoir in a small area can provide an important guarantee for rational well pattern arrangement and scientific prediction of coalbed methane productivity. The joint of coal and rock strata in the west of Fukang mining area, Xinjiang, has been observed, counted and matched, and the late Yanshanian period has been obtained. The main direction of tectonic stress field in early Himalayan and late Himalayan stage 3. Combined with the inversion method of tectonic movement and the difference of coal seam stress, the coal body structure and coal seams infiltration in 14 blocks after multi-stage tectonic movement in the study area were obtained. The results show that the permeability distribution is affected by multiple tectonic movements. In a small area, A _ 2 coal reservoir has strong permeability heterogeneity and is located in the coal seam with shallow burying depth at the uplift end of the syncline core. The coal body structure is mainly broken primary coal, and the permeability is the best, and the northeast wind oxidation zone is deep to the south wing block. The deformation of coal seam is weak, the permeability of coal seam is medium, the deeper part of the syncline core is affected by multi-stage tectonic movement, the deformation of coal body is more serious, and the permeability of coal is poor in the south and northwest. The influence of multi-stage tectonic movement is the greatest, and the permeability of coal seam is the worst. The accuracy of the prediction results is verified by the measured data of drilling coring and permeability. This method provides a method for prediction of coal seam permeability in a small area under the influence of multi-stage structure.
【作者单位】：河南理工大学能源科学与工程学院;中原经济区煤层(页岩)气河南省协同创新中心;河南理工大学安全科学与工程学院;新疆科林思德新能源有限责任公司;
【基金】：河南省高校科技创新人才支持计划(15HASTIT050) 河南省高校科技创新团队支持计划:构造煤团队(14IRTSTHN002)~~
【分类号】：TD712

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