埕岛—胜海潜山带的古岩溶作用

PALAEOEPIGENETIC DISSOLUTION OF CHENGDAO - SHENGHAI BURIED HILL

依据理岛—胜海潜山带的取心资料,在系统观察描述岩心和综合分析地震剖面资料的基础上,对研究区的古岩溶作用进行了全面研究,对风化壳的岩溶地貌特征、岩溶标志与特征、岩溶分带以及控制岩溶作用的主要因素进行了详细阐述,对于本区古岩溶作用发育的历史及其变化规律进行了深入研究.根据本区构造发展历史,可将下古生界碳酸盐岩的溶蚀作用划分为4期:第一期(加里东早期)同生—近地表成岩早期溶蚀作用;第二期(加里东晚期—海西早期)风化充期的岩溶作用;第三期(海西晚期—印支期)浅埋藏期溶蚀作用;第四期(燕山期及其后)深埋藏期溶蚀作用.这对于下一步深入研究该区的储集层特征和孔隙演化规律以及对于该区勘探区块的综合评价具有重要意义.

Based on core description and synthetic analysis of seismic sections, the palaeoepigenetic dissolution in the research area was comprehensirely studied. The geomorphic features, signs and characteristics and zonation of the palaeokarst were described and the controlling factors of palaeoepigenetic dissolution were discussed. It also makes a thorough study on the developmental history of palaeokarst of the area and its changes. In accordance with the tectonic development history of the area, the carbonate rock dissolution process of the Lower Palaeozoic in the area can be divided into four stages. The study has profound significance for further study of reservoir characteristics and pore evolution and synthetic evaluation of exploration blocks.