台湾西部油气田形成与分布

根据台湾石油地质学家多年来的工作结果,台湾西部油气田的形成主要受岩性(砂体)、背斜和断层控制,其次为地层不整合因素.在台西坳陷的西、北部和台南盆地的西、北部,油气田的分布是由构造挤压、埋藏压实和地温差异引起的油气运移方向所决定的.下一步勘探区的选择应为已知含油气背斜长轴方向的外延部位,深部木山组及其以下层位(包括白垩系),扭性断层的上升盘,基底高及其周围的地层不整合、地层尖灭区.

FORMATION AND DISTRIBUTION OF OIL AND GAS FIELDS TO THE WEST OF TAIWAN

According to the study by petroleum geologists in Taiwan,it is shown that the formation and distribution of oil and gas fields to the west of Taiwan are controlled mainly by lithology(sand body),anticline and fault, secondarily by unconformity. The distribution of oil and gas fields in western and northern parts of both Taixi Depression and Tainan Basin are influence by the hydrocarbon migration direction which controlled by structural compression,burial compaction and the geothermal difference. The prospective areas for exploration in future are regions outward the long axis direction of known oil-gas-bearing anticlines, deeper Mushan Formation and below (include the Cretaceous) ,the upthrow side of shear fault and the high area of the basement,as well as the unconformity and pinchout region around.