超稠油油藏双水平SAGD优化设计

曙一区杜84 块馆陶油层为一顶部和四周被水包围的特殊油藏, 为提高杜84 块馆陶超稠油油藏剩余油动用程度, 决定采用S AGD 开发技术。以油藏特点和开发现状为基础, 应用S TARTS 数值模拟软件, 采用变深度、不均匀网格进行油藏数值模拟, 对双水平井组合的SAGD 技术布井方式、水平段长度、水平段在油层中的位置、注采参数等进行了优化设计。实施效果表明, 各项参数的设计科学合理, 采用双水平井组合SAGD 技术, 提高超稠油原油采收率是经济可行的。

Optimization Geology Design of Pair Horizontal SAGD Wells in Super Heavy Oil Reservoirs

Guantao formation of Du Block 84 of Shu 1 Region is a special oil reservoir surrounded by top and margin water. In order to enhance the residual oil recovery of Guantao formation of Du Block 84 of Shu 1 Region, SAGD exploitation technology was adopted after elaborate analyses. The optimized design was studied on such parameters as SAGD well pattern, horizontal stage length, horizontal stage position in well and huff-puff parameters by numerical simulation by applying STARTS software with variable depth and uneven net grid based on reservoir characteristics and present exploitation status. Practice shows that all the parameters of the design are rational, and it is economical and feasible to enhance the super heavy oil recovery using pair horizontal SAGD wells.