沉积学报2017，Vol.35Issue(6)：1217-1224,8.DOI:10.14027/j.cnki.cjxb.2017.06.013
鄂尔多斯盆地古隆起东北侧马五14储层膏模孔类型及充填过程分析
Analysis on the Types and the Filling Process of the Anhydrite-model Pore of Ma514 in Northeast of the Palaeohigh, Ordos Basin
摘要
Abstract
Using the data of cores and thin sections, based on the classification of Ma514 reservoir pore types in the study area and through the pore description of thin sections, the image analysis of casting thin sections and other meth-ods, this paper gives a detailed classification of gypsum-model pore filling types and makes an elaboration of filling process. The study shows that Ma514 reservoir developed the following 4 pore types as dissolved pore ( anhydrite-model pore and other solution pores) , intercrystalline pore, intercrystalline solution pores and microcrack in the study area. According to the analysis to the carbon-oxygen isotopic characteristics of different fillings in the anhydrite-model pore, the fillings are mainly composed of dolomite, calcite and anhydrite, the fillings of partial filling anhydrite-model pore are mainly composed of dolomite silts, dolomite silts + quartz, dolomite silts + ankerite and the fillings of all filling anhydrite-model pore are mainly composed of dolomite silts + calcite, dolomite silts + quartz + calcite and dolomite silts + anhydrite. The comprehensive analysis reveals that the anhydrite-model pore is formed by the preservation of crystal outline after the dissolution of gypsum and other easily soluble crystals. Filling process in the anhydrite-model pore can be divided into the following several stages. Firstly, the anhydrite-model pore is filled with dolomite silts and dark-gray calcite in the naked weathering period. Then, the anhydrite-model pore is filled with authigenic quartz, white sparry calcite, ankerite and anhydrite.关键词
孔隙类型/膏模孔/方解石/充填方式/马家沟组Key words
pore types/gypsum-model pore/calcite/filling model/Majiagou Formation分类
天文与地球科学引用本文复制引用
刘新社,漆亚玲,李树同,邓秀芹,王琪,张文选,牟炜卫,闫灿灿,李阳..鄂尔多斯盆地古隆起东北侧马五14储层膏模孔类型及充填过程分析[J].沉积学报,2017,35(6):1217-1224,8.基金项目
低渗透油气田勘探开发国家工程实验室开放基金(2016GSKJ05-01),兰州油气资源研究中心"十三五"科技创新基金(135CCJJ20160510),中国科学院青年创新促进会人才项目(Y410ST1LST)[Open Foundation of Low Permeability Oil and Gas Field Exploration and Development National Engineering Laboratory, No. 2016GSKJ05-01 （2016GSKJ05-01）
Science and Technology Foundation of Lanzhou Center for Oil and Gas Resources Research during the "13th Five-Year Plan" No.135CCJJ20160510, Youth Innovation Promotion Association CAS,No. Y410ST1LST] （）
