塔河南TPT工区石炭系含油气特征分析

Carboniferous Reservoir Characteristic Analysis in the South TPT Region of Tahe Oilfield

塔河南TPT工区石炭系地层属于内陆沉积环境,根据钻井、沉积岩石特性等分析,石炭系下统巴楚组砂泥岩互层段在该工区的沉积相主要为冲积扇-扇三角洲沉积体积及河口湾沉积等,巴楚组底砂岩厚度一般只有10～30m,储层厚度向塔河油田主体部位的阿克库勒凸起上减薄尖灭。研究这类沉积环境中的储层特性对寻找地层尖灭油藏,扩大该区的油气勘探有着重要意义。

The carbonifierous formation in the south region of Tahe Oilfield belonged to inland sedimentary environment. According to the analyses of well drilling and sedimentary characteristics, the sedimentary facies of mudstone stratigraphic interval of Bachu group in early carboniferous series in the studied area were mainly fan delta-alluvial fan and shoreland and channel deposits. The bottom sandstone thickness of Bachu group was generally only 10~30m with a pinching out reservoir thickness attenuating to the main body Acher Kuller of Tahe Oilfield. Study of the reservoir characteristics of sedimentary environment has vital significance in seeking the stratum pinch-out oil deposits in order to expand oil and gas exploration in this area.