摘要
鄂尔多斯盆地为一大型多旋回克拉通盆地。鄂尔多斯盆地延长油气区下二叠统山西组沉积是在华力西运动构造背景下,于早期陆表海海退基础上温暖潮湿的古气候条件下发育起来的一套海陆交替相的含煤岩系。通过对山西组地层特征、岩石学特征、物源分析、沉积特征研究,结合测井、岩心等地质资料及区域上的勘探成果,认为在二叠系山西组时期,延长油气区北部和南部地区以三角洲前缘沉积相为主,发育有水下分流河道及水下分流间湾等亚相沉积。三角洲前缘的水下分流河道砂岩为优质的储集层。
Ordos basin is a large multicyclic craton basin.The lower permian shanxi formation of Yanchang oil region in Ordos basin is a set of paralic coal-bearing series formed in the warm and humid climate conditions which based on the early continental sea regression under the background of Variscan orogeny.Based on Shanxi formation characteristics,petrological characteristics,the provenance analysis and sedimentary characteristics research,in combination with logging,geological data of core and regional exploration achievement,it's found that in Shanxi formation,sedimentary facies of north and south region in Yanchang oil region are mainly delta front and developed underwater distributary channel and underwater distributary bay intrafacies,etc.Underwater distributary channel of delta front is a good sandstone reservoir.
出处
《辽宁化工》
CAS
2012年第4期366-368,371,共4页
Liaoning Chemical Industry
