石油实验地质2017，Vol.39Issue(5)：716-723,8.DOI:10.11781/sysydz201705716
基于埋藏溶蚀模拟实验的白云岩储层孔隙效应研究——以塔里木盆地下寒武统肖尔布拉克组为例
Pore effect of dolomite reservoirs based on burial dissolution simulation: A case study of the Lower Cambrian Xiaoerbulake Formation in the Tarim Basin
摘要
Abstract
Burial dissolution is one of the important factors which control the development of dolomite reservoirs, but its effect on porosity is still not clear, which restricts the evaluation and exploration of burial dissolution dolomite reservoirs. This study took arene dolomites, stromatolite dolomites and thrombolite dolomites of the Lower Cambrian Xiaoerbulake Formation in the Tarim Basin as an example, used 0.2%acetic acid solution instead of organic acids of burial environment, carried out dissolution simulation experiments of dolomite reservoirs in the condition of high tem?perature and high pressure. The results showed three different samples' porosity was improved in different tempera?tures and pressures, but their permeability increased exponentially. The reservoir space of arene dolomites changed from pores to pores and vugs, while the reservoir space of stromatolite dolomites and thrombolite dolomites changed from pores to pores and solution fractures. It implied that organic acid had a strong solubility to dolomites, and the initial pore structure controlled the final reservoir space type. With the dissolution from homogeneous to heterogeneous, the vugs and solution fractures developed heterogeneously, and reservoir connectivity was partly improved. So, burial dissolution is of great importance in reforming the permeability of dolomite reservoirs.关键词
埋藏溶蚀/模拟实验/孔隙效应/白云岩储层/肖尔布拉克组/塔里木盆地Key words
burial dissolution/simulation experiment/porosity effect/dolomite reservoir/Xiaoerbulake Forma⁃tion/Tarim Basin分类
能源科技引用本文复制引用
郑剑锋,沈安江,黄理力,陈永权,佘敏..基于埋藏溶蚀模拟实验的白云岩储层孔隙效应研究——以塔里木盆地下寒武统肖尔布拉克组为例[J].石油实验地质,2017,39(5):716-723,8.基金项目
国家重大科技专项(2016ZX05004002)及中国石油天然气股份有限公司科技部项目(2016B-04)资助. （2016ZX05004002）
