稠油开采过程中储层内有机质分异研究  

Study on differentiation of organic matter in heavy oil reservoirs during development process

作　　者：汪双清[1] 沈斌[1] 孙玮琳[1] 

机构地区：[1]国家地质实验测试中心,北京100037

出　　处：《特种油气藏》2011年第3期112-115,141,共4页Special Oil & Gas Reservoirs

基　　金：中国地质调查项目"现代有机分析技术在地质调查中的应用"(1212010816028);国家地质实验测试中心基本科研业务专项课题"卟啉类化合物HPLC-MS分析方法研究"(2009CSJ02)

摘　　要：针对辽河、大庆、大港3个油田7个不同油藏的稠油特性,进行了储层内原油有机质分异现象的研究。通过对稠油及其对应层位油砂抽提物的黏度和化学组成的系统对比剖析,考察稠油开采过程中油-岩相互作用对储层内原油的物理和化学性质的影响。实验结果表明:油-岩相互作用导致采油过程中储层内有机质的严重分异;稠油各组分分异主要取决于其极性(吸附性)及其在储层内形成氢键的能力或与砂体矿物的润湿性;在特定条件下,分子质量大小和分子的热运动能力也是影响稠油组分分异行为的重要因素。The differentiation of organic matter in heavy oil reservoirs has been studied for 7 reservoirs in the Liaohe,Daqing and Dagang oilfields.The influences of the interactions between oil and rock during producing process on the physical and chemical properties of reservoir crude are investigated on the basis of systematical analysis of the viscosity and chemical composition of the heavy oil produced and oil sand extracted from respective formations.The result reveals that the interactions between oil and rock have led to severe differentiation of organic matter in the reservoirs during thermal development process;the differentiation of heavy oil components mainly depends on polarity(absorbability) and the capability of forming hydrogen bond in reservoir as well as the wettability with reservoir minerals;moreover,under certain conditions,molecular weight and thermal activity are also significant influential factors on the differentiation of heavy oil components.

关 键 词：稠油开采 油砂 化学组成 有机质分异 分子质量 黏度 

分 类 号：TE345[石油与天然气工程—油气田开发工程]