东濮凹陷文南地区沙二下亚段沉积相研究

在了解区域构造和沉积背景的情况下,结合岩心观察、测井等资料,通过岩心特性、沉积构造特征及测井相分析,分析了文南沙二下亚段沉积相类型及特征,沉积展布特征,确定了文南沙二下亚段为一套间歇性扩张背景下发育的季节湖-三角洲相沉积体系,主要发育水下分流河道、分流河道侧翼、支流间湾沉积微相,河口砂坝和前缘席状砂微相不发育,水下分流河道是文南油田沙二下亚段的主力储集层。

Sedimentary facies study in the salt rocks under the second member of the Shahejie formation of Wenliu area in Dongpu Depression

In the understanding of regional tectonic and depositional setting of the case,the combination of core,logging and so on,through the core features,structural features and sedimentary facies analysis logging,analysis WenLiu south region under the sub-paragraph of sand 2 types and characteristics of sedimentary facies,depositional distribution features,defined WenLiu south region under the sub-paragraph of sand 2 a set of background expansion and development of intermittent seasonal lake-delta sedimentary system,and developing underwater distributary channel,distributary channel flank,between the Bay microfacies tributaries,estuary sand bar and front sheet sand facies are not developed,underwater channels is the main reservoir in WenLiu south region under the sub-paragraph of sand 2 sedimentary facies.