从中国沉积盆地的结构看塔里木盆地找油方向

A WAY TO FIND OIL IN TARIM BASIN BY STRUCTURAL ANALYSIS OF CHINA SEDIMENTARY BASINS

杨克绳

Yang Kesheng

石油物探局物探地质研究院 河北涿州072751

RESEARCH Institute of Geophsics, Bureau of Petroleum Geophysics

从勘探实践证明,一般箕状断陷发育的中期为其主导的成油期,多层结构的沉积盆地台型构造层是最佳成气期。塔里木盆地是典型的“台、断、拗”多层结构的含油气盆地,所以其台型构造层同样为最佳成气期(与四川、鄂尔多斯盆地所不同的是热流值较低致使凝析油比例较大),箕状断陷发育阶段也同样是最佳成油期。以这一地质规律为鉴,除目前重点勘探区外,应运用地震新方法(即同时加垂直反射主剖面测线的折射地震排列)相继开辟中生界一下第三系发育的库车、西南断陷的地震勘探工作,为下步找油工作准备出目的层准确的构造高点。

In a vievv of exploratory practice,it is provedthat generally the midaestage of a half-graben evolution should be considered as the peak oil generation,while the developing period of platform strutural layer in a petroliferous basin as the optimuln stage of gas generation,Tarim basin is a typical petroliferous basin with a multi-layered structure consisted of platform,downfault and depression,the developing stage of the platform structural layer is the peak generation, but a higher ratio of condensate oil in the basin than those in he Sichuan andordos Bsans,due to rather lower value of haet flow for the Tarim Basini and the developing stage of the half-graben is the peak oil generation, In vievv of the abovementioned geological pattern,the author suggests that a new seismic method(VSP)be applied to carry out seismic survey in the Mz-Efault-depressions of the Kuche and the SW Tarim in order to seek new structural highs for future petroleum exploration in the basin.

https://doi.org/10.11781/sysydz199403243