reservoir delta

It has three reservoir sands: the barrier bar of Carboniferous Taiyuan Formation, delta-plain distributary channel sand of Permian Shanxi Formation and fluvial facies channel sand of Lower Shihezi Formation. The reservoir sands are low porous, low permeable and tight.

气田具有石炭系太原组障壁沙坝、二叠系山西组三角洲平原分流河道砂和下石盒子组河流相河道砂3套储集体，储集体为低孔、低渗、致密性储层；

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The reservoir physical characterization in sloping delta front excelled that of mesa delta front.

三角洲坡型前缘的物性特征优于三角洲台型前缘.

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Western gentle slope is mainly developing fan delta and eastern steep slope developing underwater fan. 3 、 The reservoir is mainly the front of fan delta, submarine fan sand.

西部缓坡带以扇三角洲为主，东部陡坡带发育有水下扇。

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The reservoir quality of bank of river facies, distributary channel of shallow delta, distal bar and distal channel of delta front, sand sheet, overbank of terminal fan take second place.

河流相堤岸亚相、浅水三角洲分流河道、三角洲前缘远河道与远砂坝、前缘席状砂、末端扇河道漫溢相储层物性次之。

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Its reservoir is controlled by a large delta depositional system.

大型三角洲沉积体系对凹陷的储层起主要控制作用.

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