巴楚—麦盖提地区不整合面特征与油气分布关系

Characteristics of Unconformity and Its Relations to Hydrocarbon in Bachu-Mageti Area.

巴楚—麦盖提区块经过多期构造运动,形成了多个不整合面,而这些不整合面与油气藏的形成密切相关。迄今为止,该区块发现的鸟山气藏与和田河气田均与不整合面有关。通过对巴楚—麦盖提区块主要不整合面发育特征的分析和研究,认为自震旦系至第四系共发育6个不整合面,其中主要的不整合面为奥陶系顶、三叠系顶和上新统底部的3个不整合面;按不整合面的性质及其与油气的关系可划分为4种类型,它们均不同程度地控制着油气藏的类型及分布。

The Bachu-Mageti area in Tarim basin underwent multistage tectonic movements,forming a certain number of unconformities,which were closely related to formation of the oil-gas reservoirs.Up to now,Niaoshan gas reservoir and Hetian gas field have been found and confirmed their relationship with the unconformities.The study showed that there exist six unconformities in total development from Sinian to Quaternary.The important is the tops of Ordovician and Tertiary and the bottom of Pliocene series.According to the properties and relations to hydrocarbons,the unconformity can be classified into four types which could control the types and distribution of oil reservoirs to a certain extent.