巴基斯坦中印度河盆地构造与层序地层学研究(英文)

Sequence stratigraphy and tectonics in Middle Indus Basin, Pakistan

中印度河盆地是巴基斯坦南部的一个主要含气区,目的层平均埋深为3500m,圈闭类型为构造、岩性或构造-岩性混合圈闭,目前勘探主要是寻找Low Goru组砂岩的天然气。为了进一步了解该盆地的剩余勘探潜力,根据Exxon的识别不整合面和可对比整合面的方法,对中印度河盆地从侏罗系到最新的沉积进行了层序地层解释,并对烃源岩、储集层、盖层及不同沉积环境的形成进行了板块构造背景分析。在新建立的层序地层框架下,对中印度河盆地2个已证实含油气层系进行了描述。

The Middle Indus Basin (MIB) constitutes a major gas province in the Southern Pakistan. The main current exploration activities is concentrated on the gas accumulations in Lower Goru sandstone in structural, stratigraphic and mixed stratigraphic/structural traps at the average depth of 3500 m. To better understand the petroleum system of the MIB and the residual exploration potential in this region, according to the Exxon method of identifying unconformities and their correlative conformities, a sequence stratigraphic interpretation was carried out on the Jurassic to recent sediments of the MIB. The plate tectonic setting of depositional environment for source, reservoir and seal play elements has been evaluated. Additionally, two proven play fairways in the MIB were described by using the framework of the new sequences stratigraphy.