贝雷岩心孔隙结构特点及其驱替特征PORE STRUCTURE AND DISPLACEMENT CHARACTERISTICS OF BEREA CORE
王克亮,袁圆,伊鹏,孙术杰,李维亮,ZHUO Yue
WANG Keliang,YUAN Yuan,YI Peng,SUN Shujie,LI Weiliang,ZHUO Yue
摘要(Abstract):
选取渗透率约为0.3μm~2和0.8μm~2的天然岩心、人造岩心和贝雷岩心进行压汞实验,绘制了3种岩心的毛管力曲线,对比分析了不同类型岩心的孔隙和喉道特点。使用不同界面张力等级的复合体系在3种岩心中进行了驱油实验,分析了3种岩心的驱替特征。研究结果表明:人造岩心孔隙分布集中、结构单一,增加驱替体系黏度就能取得较好的驱油效果,无法充分体现界面张力对驱油效果的影响;贝雷岩心和天然岩心无论从孔隙结构上还是驱替特征上都具有极大的相似性,但由于同一地区天然岩心黏土含量不同等原因,用天然岩心进行驱油实验存在实验结果重复性差、平行实验对比难的问题。因此,用贝雷岩心进行驱油所得到的实验结果既具有良好的重复性,又能反映出不同性质驱油体系的驱替特征。
The natural,artificial and Berea cores with two different permeabilities(about 0.3μm~2 and 0.8 μm~2)are selected for mercury penetration experiment,and then the capillary force curves are plotted,the pore and throat characteristics of the different cores are contrasted and analyzed.By means of the oil displacing experiments of ASP systems with different interfacial tension levels,the displacement characteristics of these three kinds of cores are analyzed.The study results show that the pore structure contribution of the natural core is concentrated,but rather single,much better flooded effects are obtained thanks to the increased system viscosity and influence of the interfacial tension can not be reflected;Compared with the artificial and Berea cores,there are great similarity no matter in the pore structures but the displacement characteristics.But the problems exist for the natural cores that the rather poorer experimental result repeatability and contrast difficult in the parallel test due to the reasons such as different clay contents and so on in the same region.Therefore,the experimental results from Berea cores are not only repeatable perfectly,but also can reflect the displacement characteristics of different qualities of the oil flooding systems.
关键词(KeyWords):
人造岩心;天然岩心;贝雷岩心;孔隙结构;界面张力;驱油效果
artificial core;natural core;Berea core;pore structure;interfacial tension;displacement effect
基金项目(Foundation): 国家自然科学基金项目“原油对泡沫稳定性作用机理研究”(51374073);; 国家科技重大专项“复杂油气田地质与提高采收率技术”(2011ZX05009)联合资助
作者(Author):
王克亮,袁圆,伊鹏,孙术杰,李维亮,ZHUO Yue
WANG Keliang,YUAN Yuan,YI Peng,SUN Shujie,LI Weiliang,ZHUO Yue
参考文献(References):
- [1]皮彦明.三元复合体系在贝雷岩心中的驱油效果研究[D].大庆:东北石油大学,2012.
- [2]金成志,杨双玲,舒萍,等.升平开发区火山岩储层孔隙结构特征与产能关系综合研究[J].大庆石油地质与开发,2007,26(2):38-41.
- [3]王金勋,杨普华,刘庆杰,等.应用恒速压汞实验数据计算相对渗透率曲线[J].石油大学学报,2003,27(4):66-69.
- [4]马文国,王影,海明月,等.压汞法研究岩心孔隙结构特征[J].实验技术与管理,2013,30(1):66-69.
- [5]刘义坤,刘云龙,隋新光.大庆油田萨中地区过渡带储层的孔隙结构[J].大庆石油学院学报,2004,28(1):109-113.
- [6]王新江,张丽萍,石京平.海拉尔油田孔隙结构特征分析[J].大庆石油地质与开发,2007,26(6):91-94.
- [7]蒲秀刚,黄志龙,周建生,等.孔隙结构对碎屑储集岩物性控制作用的定量描述[J].西安石油大学学报:自然科学版,2006,21(2):15-18.
- [8]刘青年,王武贤.大庆油田砂岩的孔隙结构特征[J].大庆石油地质与开发,1984,3(2):255-269.
- [9]马新仿,张世诚,郎兆新.储层岩石孔隙结构的分形研究[J].中国矿业,2003,12(9):47-49.
- [10]贾忠伟.界面张力及乳化油滴对三元复合驱驱油效果的影响[D].大庆:大庆石油学院,2008.
- [11]陈丽文.驱油用石油磺酸盐界面张力与驱油效果研究[J].油气田地面工程,2009,28(9):19-20.
- [12]唐钢,李华斌,苏敏.复合驱界面张力与驱油效率的关系研究[J].大庆石油地质与开发,2005,24(3):81-83.
- [13]贾患伟,杨清彦,侯战捷,等.油水界面张力对三元复合驱驱油效果影响的实验研究[J].大庆石油地质与开发,2005,24(5):79-81.
- 人造岩心
- 天然岩心
- 贝雷岩心
- 孔隙结构
- 界面张力
- 驱油效果
artificial core - natural core
- Berea core
- pore structure
- interfacial tension
- displacement effect