塔里木盆地台盆区寒武系大油气田有利勘探区预测

Prediction of favorable exploration area of giant oil and gas fields in Cambrian of platform-basin transitional area of Tarim basin

随着塔里木盆地台盆区勘探工作的深入,工作重点已逐渐由浅层向深层过渡.作为塔里木盆地台盆区最古老的含油气层位之一,寒武系越来越为勘探所重视,分析寒武系油气成藏的主控因素及分布规律对指导油气具有重要的意义.根据中国典型叠合盆地油气形成富集与分布预测成果,在恢复影响大油气田发育的4个成藏主控因素(古隆起、烃源岩、区域盖层和构造平衡叠合带)演化历史的基础上,应用"多元复合—过程叠加"成藏模式,对塔里木盆地台盆区寒武系大油气田有利勘探区进行预测.预测结果不仅与已发现的油气田有较好的吻合关系,还指明了潜在的未被发现有利勘探区带,对塔里木盆地勘探向深层过渡具有一定的指导意义.

In recent years, with the deepening of exploration in Tarim basin, the focus of exploration is transformed from shallow layers to deep layers. As one of the oldest petroliferous layers in platform-basin transitional area of Tarim basin, More and more attention has been paid to Cambrian by petroleum geologists. This paper is one part of the latest research achievements of national basic research program project. On the basis of recovering the evolution history of four controlling factors (paleo-anticline, source rock, regional cap rock and kinematic equilibrium belt), the model of 'multi-factor recombination and processes superimposition' is adopted to predict the favorable exploration area of Cambrian. The predicting result is not only in good coincidence with oil and gas fields found, but also indicates undiscovered potential favorable exploration area, which will further direct the exploration on Cambrian of Tarim basin.