准噶尔盆地西北缘二叠系上乌尔禾组低阻气层成因分析与识别方法研究——以K83井区为例  

Research on Cause Mechanism and Identification of Low Resistivity Gas Zone in K83 Block

作　　者：石新朴[1] 史全党[1] 侯向阳[1] 侯磊[1] 胡宗芳[1] 邵丽[1] 刘金香[1] Shi Xinpu;Shi Quandang;Hou Xiangyang;Hou Lei;Hu Zongfang;Shao Li;Liu Jinxiang(No.1 Gas Production Plant,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang,834000,China)

机构地区：[1]中国石油新疆油田分公司采气一厂,新疆克拉玛依834000

出　　处：《新疆地质》2020年第3期383-387,共5页Xinjiang Geology

摘　　要：为解决常规测井方法难以有效识别低阻气层的难题,以准噶尔盆地西北缘K83井区二叠系上乌尔禾组乌二段气藏为例,利用岩心分析化验数据、录测数据、试油数据等资料,分析了低阻气层成因及识别方法。通过研究,认为目的层发育三角洲前缘亚相,与下部常规油层相比,储层岩石粒度较细,泥质含量高,储集空间类型与孔隙结构复杂,粘土矿物含量高,是形成该地区低阻气层的主要原因。利用气层在声波、密度和中子三条曲线上的响应特征,提出利用该地区的三孔隙度差值与比值法进行气层识别,对全区所有井进行了二次解释,并提出了试气井段。试气井段产气数据表明,该方法对低阻气层的识别结果较可靠,在生产中具较好适用性。To solve the problem that conventional logging methods can’t be used to effectively identify low resistivity reservoirs,taking second member of upper Wuerhe formation(P3w2)of K83 Block,the paper analyzed the cause and identification method of low resistivity gas zone.Through the study,the paper found that P3w2 developed delta front subfacies.Contrast to conventional reservoirs below,it had more fine rock grain size,higher mud content,pore types and structure are more complex,higher clay mineral content,all those factors made this area form the low resistivity gas zone.Based on analysis of low resistivity reservoir characteristics,this paper found the different value and ratio method of three porosity can identify the gas zone better in the study area.Using this method,this paper interpreted all wells again,and finally proposed the well section of gas test.This method is reliable in qualitative identification and quantitative evaluation of low resistivity gas zone,and has good applicability in production.

关 键 词：K83井区 上乌尔禾组 低阻油气层 三孔隙度差值 三孔隙度比值 

分 类 号：P534.46[天文地球—古生物学与地层学] P618.13[天文地球—地质学]