准噶尔盆地玛湖凹陷西北斜坡区三叠系百口泉组二段储层分类与“甜点”预测  

Reservoir classification and“sweet sports”prediction of the 2nd member of Triassic Baikouquan Formation of northwestern slope area in Mahu Sag of Junggar Basin

作　　者：马海龙[1] 王兆生 王爱霞[1] 苏静[1] 夏近杰[1] 李晶 MA Hailong;WANG Zhaosheng;WANG Aixia;SU Jing;XIA Jinjie;LI Jing(Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Karamary834000,China;College of Mining Engineering,Liaoning Technical University,Fuxin 123000,China;Xinjiang Branch of CNPC Logging Coporation,Karamay 834000,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000 [2]辽宁工程技术大学矿业学院,辽宁阜新123000 [3]中国石油集团测井有限公司新疆分公司,新疆克拉玛依834000

出　　处：《大庆石油地质与开发》2023年第4期30-36,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“低渗‒致密砂岩储层体系表征及评价新方法”(2017ZX05009001-002)。

摘　　要：玛湖凹陷三叠系百口泉组二段(T1b2)甜点储层勘探具有良好的前景,但是已有储层分类方法实用性较差,不利于甜点储层的分布预测研究。利用地质、测试、测井和生产数据,从储层发育特征分析入手,基于模糊聚类法和测井评价法,建立了研究区的储层划分方案,并预测了甜点储层的分布特征。结果表明:玛湖凹陷百口泉组二段储集空间主要为残余粒间孔和粒内溶孔,少量发育的砾缘缝对储层渗流具有一定的改善作用;物性、含油性和泥质含量数据是模糊聚类分析合适的样本参数,基于隶属度将储层划分为3类;甜点储层受控于沉积微相的展布,Ⅰ类储层和Ⅱ类储层主要分布在扇三角洲内前缘,在外前缘分布规模较小,不同物源水系的储层甜点规模存在明显差异。研究成果可为玛湖凹陷三叠系百口泉组的进一步勘探提供指导。The exploration of sweet-spot reservoirs in the 2nd member of Triassic Baikouquan Formation(T1b2)in Mahu Sag have good prospect,but current reservoir classification method has poor practicability and is not condu‑cive to distribution prediction of sweet-spot reservoirs.By comprehensively using geological,testing,logging and production data and starting from the analysis of reservoir development characteristics,reservoir division scheme of studied area is established and distribution characteristics of sweet-spot reservoirs are predicted based on fuzzy clus‑tering and logging evaluation method.The results show that T1b2 reservoir space in Mahu Sag is mainly divided as re‑sidual intergranular pores and intragranular dissolved pores,and a small amount developed gravel edge fractures have improvement effect on reservoir flow.The data of physical property,oil-bearing property and argillaceous con‑tent are appropriate sample parameters for fuzzy clustering analysis,and T1b2 reservoirs are divided into 3 types based on membership.T1b2 sweet-spot reservoirs in Mahu Sag are controlled by sedimentary microfacies distribu‑tion.ClassⅠand ClassⅡreservoirs mainly develop in fan-delta inner front,while less distributed in outer front.Sweet-spot reservoirs scale of different-provenance stream systems appears obvious differences.The research pro‑vides guidance for further exploration of Triassic Baikouquan Formation in Mahu Sag.

关 键 词：模糊聚类法 测井评价 储层分类 百口泉组二段 玛湖凹陷 

分 类 号：TE122[石油与天然气工程—油气勘探]