煤层气L型水平井煤体结构识别方法——以沁水盆地南部沁南东区块为例  

Method for Identifying Coal Texture of L-shaped Horizontal Wells-Taking Qinnan East Block in Southern Qinshui Basin as an Example

作　　者：陈翔羽 刘易 杨艳磊 齐守金 刘婉儿 罗丹 CHENG Xiangyu;LIU Yi;YANG Yanlei;QI Shoujin;LIU Waner;LUO Dan(Shanxi Coalbed Methane Exploration and Development Branch,PetroChina Huabei Oilfield Company,Shanxi 046000;PetroChina Huabei Oilfield Company,Hebei 062550)

机构地区：[1]中石油华北油田山西煤层气勘探开发分公司,山西046000 [2]中石油华北油田,河北062550

出　　处：《中国煤层气》2023年第3期17-20,共4页China Coalbed Methane

摘　　要：针对水平井测井参数较少,煤体结构识别手段较不成熟的难题,文章论证了采用随钻测井参数识别煤体结构的可行性,明确了自然伽马以及钻时两项随钻测井参数识别煤体结构的方法,并通过沁南东区块水平井产气效果进行了验证。结果表明,自然伽马值可有效识别出钻井时是否出现了出层以及是否遇到了夹矸,对于构造煤可一定程度识别;钻时可识别出原生煤与构造煤。自然伽马曲线与钻时曲线呈明显负相关关系,煤层中钻时越小、自然伽马值越大,煤体结构越破碎,压裂改造效果越不好,单井产气效果越差。In response to the challenges of limited logging parameters for horizontal wells and less mature methods for identifying the coal texture,this paper demonstrates the feasibility of utilizing logging parameters while drilling to identify the coal texture,and clarifies the methods using two logging parameters,natural gamma and the drilling time,to identify the coal texture.The method is verified through the gas production effect of the horizontal wells in Qinnan East Block.The results indicate that the natural gamma values can effectively identify whether there is an occurrence of layering and encountering parting while drilling,and can be used to identify the coal texture to a certain extent.Drilling time can be used to distinguish between primary coal and tectonic coal.There is a significant negative correlation between the natural gamma curve and the drilling time curve.The smaller drilling time in the coal seam corresponds to a higher natural gamma value and more fractured coal texture.This also implies a worse fracturing effect and an inferior gas production performance in a single well.

关 键 词：沁水盆地 煤体结构 水平井 自然伽马 钻时 

分 类 号：TE243[石油与天然气工程—油气井工程]