沙湾凹陷砂砾岩沸石胶结物与碎屑颗粒粘结差异成因分析  

Genesis of Differential Bonding Between Zeolite Cements and Clastic Particles in Sandy Conglomerates in Shawan Sag,Junggar Basin

作　　者：况昊 周元东 刘豪 潘浪 周润驰 王钧民 谭先锋 KUANG Hao;ZHOU Yuandong;LIU Hao;PAN Lang;ZHOU Runchi;WANG Junmin;TAN Xianfeng(School of Petroleum Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Qinghe Oil Production Plant,Shengli Oilfield Company,Sinopec,Shouguang,Shandong 262714,China;Zigong Petrochemical Company Limited,Sinopec,Zigong,Sichuan 643000,China;Well Testing Company,Xibu Drilling Engineering Co.,Ltd.,CNPC,Karamay,Xinjiang 834000,China)

机构地区：[1]重庆科技大学石油与天然气工程学院,重庆401331 [2]中国石化胜利油田分公司清河采油厂,山东寿光262714 [3]中国石化自贡石油化工有限公司,四川自贡643000 [4]中国石油西部钻探工程有限公司试油公司,新疆克拉玛依834000

出　　处：《新疆石油地质》2024年第2期163-171,共9页Xinjiang Petroleum Geology

基　　金：国家自然科学基金(42072140)。

摘　　要：通过岩石薄片、扫描电镜、能谱分析等微观实验,对准噶尔盆地沙湾凹陷二叠系砂砾岩储集层中沸石胶结物类型及特征进行了分析,明确了沸石胶结物与碎屑颗粒粘结差异的机理。结果表明:上二叠统上乌尔禾组储集层中,塑性岩屑变形及偏碱性地层水使得浊沸石与碎屑颗粒的粘结性较强;下二叠统风城组储集层浊沸石在异常高压、酸性流体等条件下,与碎屑颗粒粘结程度低,而片沸石由于其晶体特征,与碎屑颗粒的粘结程度较高;上乌尔禾组和风城组储集层中沸石胶结物与碎屑颗粒粘结差异主要与岩石成分、异常压力、矿物类型、晶体结构及后期成岩流体改造程度有关。Through thin section and scanning electron microscopy(SEM)observations and energy spectrum analysis,the types and charac-teristics of zeolite cements in the Permian sandy conglomerate reservoirs in the Shawan sag of Junggar basin were identified,and the mecha-nism of differential bonding between zeolite cements and clastic particles was clarified.The results show that in the Upper Permian upper Wuerhe reservoirs,the plastic deformation of rock fragments and alkaline formation water result in strong bonding between laumontites and clastic particles and in the Lower Permian Fengcheng reservoirs,laumontites are lowly bonded with clastic particles under the conditions of abnormally high pressure,and acidic fluids,while heulandites are highly bonded with clastic particles due to their crystal characteristics.The differential bonding between zeolite cements and clastic particles in the upper Wuerhe and Fengcheng reservoirs are mainly related to rock composition,abnormal pressure,mineral type,crystal structure,and the degree of late diagenetic fluid alteration.

关 键 词：沙湾凹陷 二叠系 上乌尔禾组 风城组 沸石胶结物 碎屑颗粒 粘结差异 成因分析 

分 类 号：TE122[石油与天然气工程—油气勘探]