塔里木盆地下古生界热液白云岩储层的主控因素及识别特征

英文篇名：Key Controlling Factors and Identification Characteristics of Lower Paleozoic Hydrothermal Dolostone Reservoirs in Tarim Basin
中文刊名：海相油气地质
英文刊名：Marine Origin Petroleum Geology
作者：郑剑锋 ; 沈安江 ; 潘文庆 ; 郑兴平 ; 刘永福
英文作者：Zheng Jianfeng ; Shen Anjiang ; Pan Wenqing ; Zheng Xingping ; Liu Yongfu
中文关键词：塔里木盆地 ; 下古生界 ; 热液作用 ; 白云岩储层 ; 储集层特征 ; 控制因素
英文关键词：Lower Palaeozoic ; Hydrothermal process ; Dolostone reservoir ; Reservoir characteristics ; Controlling factor ; Tarim Basin
出版日期：2011-10-15
机构：中国石油杭州地质研究院;中国石油集团碳酸盐岩储层重点实验室;中国石油塔里木油田公司勘探开发研究院;
年：2011
期：04
出版单位：海相油气地质

摘要

塔里木盆地下古生界中热液活动多,相应地也发育较多的热液白云岩储层。认为该类储层的规模具有局限性,更多的是对前期已经形成的储层进行叠加改造,但由于盆地内热液影响的范围大,对储层的改造作用也相当可观。对大量的岩心、薄片及露头的研究表明,具有一定孔渗性的石灰岩和白云岩地层为热液白云岩储层的发育提供了物质基础,高角度深大断裂为热液提供了运移通道,而热液溶蚀作用和热液白云石化作用是热液白云岩储层的主控因素。该类储层不仅在岩石学、地球化学特征上与其它类型的白云岩储层有很大差别,其测井及地震响应特征也具有特殊的识别标志。
Many evidences of hydrothermal actions exist in lower Paleozoic rocks in Tarim Basin and so many hydrothermal dolostone reservoirs develop.The research on hydrothermal dolostone reservoirs indicates that this type of reservoirs can not be widely distributed in scale while otherwise the hydrothermal actions just repeatedly reformed the reservoirs that formed before.Due to hydrothermal actions infective widely in the basin,this reformation can be considerable.The analysis of lots of data from cores,thin sections and outcrops has shown that the limestone and dolostone with definite porosity and permeability supply the material base for developing hydrothermal dolostone reservoirs and high-angle thrusts supply the migration pathways so it is concluded that the hydrothermal dissolution and hydrothermal dolomitization are the key controlling factors.These hydrothermal reservoirs can be identified from the other reservoirs by many particular identifiable indications in petrology and geochemistry beside in log response and seismic response.

引文

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