塔河油田4区奥陶系油藏缝洞单元的划分

Partition of fracture-cave units of Ordovician reservoir in Block 4 of Tahe Oilfield

李竞好

Li jinghao

胜利油田分公司地质科学研究院，山东 东营 257015

Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257015, China

缝洞单元目前广泛应用于潜山油藏连通状况研究，对于即将实施注水开发的潜山油藏来说，缝洞单元的划分尤为重要，其目的就是认清井间的储层连通关系，保证注水开发效果。应用塔河油田4区的动态资料、静态资料，从流体性质、压力系统特征和井间储层连通关系，对近60口井进行了缝洞单元的划分。全区共划分了31个缝洞单元，并根据缝洞单元的连通范围及天然能量大小，将其划分为Ⅰ、Ⅱ、Ⅲ共3类，其中Ⅰ类1个，Ⅱ类7个，Ⅲ类23个，并在该划分结果基础上，实施注水开发，取得了较好的开发效果，验证了划分结果的正确性。

Fracture-cave units are extensively used to research the connectivity of buried hill reservoirs. The partition of fracture-cave
units is very important for the buried hill reservoirs to be about to conduct flood development soon. The destination is to define the
connected component of interwell reservoirs in order to insure the flooding effect. Through using the dynamic and static data, the
fracture-cave units are divided in 60 wells from the fluid property, pressure system characteristics, connected component of interwell
reservoirs. 31 fracture-cave units are compartmentalized in the area. They are subdivided into the type玉, 域, 芋according to the
connectivity range of fracture-cave units and the size of natural energy. The flood development is implemented based on the divided
results and a good developing effect has been obtained.