苏德尔特构造带三叠系布达特群潜山油藏特征

海拉尔盆地布达特群潜山油藏是目前苏德尔特构造带的主要勘探目标。但长期以来,由于油藏类型及特征认识的不深入制约了其进一步勘探开发。在对研究区构造特征认识的基础上,结合工区内的试油试采、生产资料,总结出该区油藏的三大特征,即含油储渗体基本不连通,相似部位、距离很近的2口井的生产情况差别很大,产层流压变化很大。通过岩心观察和其他资料的综合研究,发现该区裂缝在流体的储集与渗流中起主导作用。综合以上2方面的特征并结合网络状油气藏概念,将该地区油藏类型定为不规则裂缝网络状油藏。

Study on Characteristics of Buried Hill Oil Reservoir of Budate Group in Sudeerte Tectonic Belt of Hailar Basin

Buried hill oil reservoir of budate group in Hailar Basin is the central exploration target of the Sudeerte tectonic belt recently. Because there is bottom water in local area in the studied area, budate group buried hill oil pool is always considered to be" the multiple oil pool controlled by top surface structure morphological feature of the buried hill" along with the deep study of buried hill. Study finds that most of oil pools in the area don't have the characteristics, but it is simiar to the network-like oil pool which is put forward by Zhou Xingxi. The fluid system is not interconnected, the oil production of two wells which lie in the same structure portion and reservoir flowing pressure changes greatly. Combined with the Budate group buried hill reservoir feature of Sudeerte tectonid belt, the oil pool type of studied area is named irregular fracture network-like buried hill oil reservoir.