聚合物分子聚集体形态及其油藏适应性  

CONFIGURATIONS OF THE POLYMER MOLECULAR AGGREGATE AND THEIR OIL RESERVOIR APPLICABILITIES

作　　者：卢祥国[1] 周彦霞[1] 孙哲[1] 谢坤[1] 杨怀军[2] 张杰[2] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油大港油田公司采油工艺研究院,天津300280

出　　处：《大庆石油地质与开发》2015年第6期88-94,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金重点项目"抗盐型聚合物油藏适应性及其改进方法基础研究";黑龙江省自然科学基金重点项目"抗盐型聚合物缔合程度及其油藏适应性研究"(ZD201312)

摘　　要：以物理化学、高分子材料学和油藏工程为理论指导,以化学分析、仪器检测和物理模拟为技术手段,以聚合物分子聚集体形态、第一法向应力差、阻力系数、残余阻力系数和采收率等为评价指标,研究了聚合物分子聚集体形态对聚合物溶液性能及其油藏适应性影响。结果表明:聚合物溶液视黏度与聚合物分子聚集体形态密切相关,但它不能反映聚合物分子聚集体在多孔介质内传输运移能力,也不能评价聚合物溶液与储层岩石孔隙间适应性状况;与"线-支链"型聚合物相比较,网型聚合物分子聚集体具有区域性"片-网状"结构形态,它吸附和包裹水分子能力较强,发生形变时内摩擦力较大,"等浓"条件下视黏度较高;改变聚合物分子聚集体形态可以改善聚合物增黏性,但必须控制好交联或缔合程度,否则就会导致聚合物分子聚集体与储层岩石孔隙间适应性变差,进而影响聚合物驱增油效果。Theoretically guided by the physiochemistry, high-molecule materials science and oil reservoir engineer- ing, taking the chemical analysis, instrument detection and physical simulation as the technical methods, and fur- thermore regarding as the configurations of the polymer molecular aggregate, first normal stress difference, resist- ance coefficient, residual resistance coefficient, oil recovery and so on as the evaluating indexes, the influences of the configurations on the performances of the polymer solution and their reservoir applicabilities are researched. The results show that the apparent viscosity of the polymer solution is closely related to the co lar aggregate. However, they reflect neither the transporting and migrating abilities of the porous media, nor the applicabilities of the polymer solutions with the reservoir rocks and nfigurations of the molecu- molecular aggregate in the pores; Compared with the ＂ linear- branched chain＂ polymer, the molecular aggregate of the network polymer has a regional ＂ laminated- network＂ structure, which has stronger abilities to adsorb and wrap hydrones, once the deformation occurs, the in- ternal friction is larger, and the apparent viscosity is higher under the condition of ＂ isoconcentration＂. With the changes of the configurations of the polymer molecular aggregate, the viscosifying property of the polymer can be improved, but the degree of the crosslinking or association must be controlled properly. Otherwise, the applicabilities of the polymer molecular aggregate to the reservoir cocks and pores will become poorer, and moreover the oil in- cremental effect of the oolvmer flooding will be influenced as well.

关 键 词：聚合物分子聚集体 岩石孔隙 适应性 物理模拟 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]