句容盆地的遥感地质特征和油气综合勘探

GEOLOGICAL CHARACTERISTICS WITH REMOTE SENSING AND COMPREHENSIVE HYDROCARBON EXPLORATION OF JURONG BASIN

遥感图像反映,句容、宁镇山区曾解释为推覆的“叠瓦构造”的地震剖面实际为一系列北西向张扭性断裂线性体的误解。遥感 v-环-色模式反映,油气色调晕圈主要分布在句容重力高东侧,是油气圈闭的地面指示标志。对中、古生代海相碳酸盐岩复杂构造区的油气勘探,应加强遥感、化探、放射性测量等非地震方法的综合评价研究。

Remote sensing images reveal that the nappe structures in Jurong Basin might relateto E-W or NEE striking arcuate linear structures in the basin.The tenso-shear fault linear structural system in Ningzheng Mountains that stretches into the basin once had been in-terpreted to be imbricate structures in seismic profile by mistake rather than nappe struc-tures.According to v-circular structure-tonal anomaly model of remote sensing,hydrocar-bon tone halos are mainly located in the east side of Jurong gravitational high,suggestingthat the distribution of the halos is controlled by NNE-strike torsion structures and theirsubsidiary faults,and by NW-strike cross faults and near NS-directional faults.Thus thehalos could be considered as ground indication of hydrocarbon traps.It is proposed thatnon-seismic techniques such as remote sensing,geochemical exploration,radioactiveprospecting should be strenghed in the study area,and a synthetic assessment model of hy-drocarbon traps should be established so as to make a break throug in its oil and gas explo-ration.This is the general trend for hydrocarbon exploration in Paleozoic and Mesozoiccarbonate rocks in the middle and lower reaches of the Yangtze River.