石油实验地质2017，Vol.39Issue(5)：647-654,8.DOI:10.11781/sysydz201705647
火山岩储层微观孔隙结构分类评价 ——以准噶尔盆地东部西泉地区石炭系火山岩为例
Classification and evaluation of micro pore structure of volcanic rock reservoirs: A case study of the Carboniferous volcanic reservoirs in Xiquan area, eastern Junggar Basin
摘要
Abstract
The studies of the characteristics of volcanic reservoirs in Xiquan area of the Junggar Basin are relatively weak. The pore types and pore assemblages as well as the micro pore structural features of the Carboniferous volcanic reservoirs in Xiquan area were classified and evaluated in this paper according to hydrocarbon yield, and also based on the observation and description of cores from 25 drilling wells, and the identification and quantifying of casting thin sections under microscope, measurement of SEM, porosity and permeability and capillary pressure. Four types of volcanic reservoirs were identified based on the thin?section porosity and the superior pore assemblage. The typeⅠpore assemblage is the vesicles+enlarged dissolution vesicles and dissolution pores+fractures. The type Ⅱ includes vesicles+structural fractures+dissolution fissures. The type Ⅲ is vesicles+dissolution pores, while only isolated fine pores developed in the type Ⅳ reservoir. The thin?section porosity reduces in turn from the type Ⅰ to the type Ⅳ. Different micropore structure of the volcanic reservoirs indicated that the type Ⅰ is an excellent reservoir with well?developed large pores and coarse throats. The type Ⅱ and type Ⅲ are better to medium favorable reservoirs with developed large to medium pores and medium to fine throats. While the type Ⅳ is a tight reservoir due to its fine pores and fine to micro throats. Finally, a volcanic reservoir classification and evaluation criterion for the study area was established on the basis of the above study and integrated with well logging data.关键词
储集空间组合/孔隙结构/分类评价/火山岩储层/西泉地区/准噶尔盆地Key words
reservoir pore assemblage/pore structure/classification and evaluation/volcanic reservoir/Xiquan area/Junggar Basin分类
能源科技引用本文复制引用
马尚伟,罗静兰,陈春勇,何贤英,代静静,许学龙,汪冲..火山岩储层微观孔隙结构分类评价 ——以准噶尔盆地东部西泉地区石炭系火山岩为例[J].石油实验地质,2017,39(5):647-654,8.基金项目
国家科技重大专项"东西部火山岩储层与鄂尔多斯盆地长7致密砂岩储层成岩演化序列与有利储层评价"(2011ZX05001-002-008)资助. （2011ZX05001-002-008）
