Drilling and completion optimization technology in complex fault-block reservoir with tridimensional development

Due to the low reserves of the complex small fault-block reservoir, the recovery ratio and economic benefit is very low in using of traditional technology. So the complex small fault-block reservoir should be developed in tridimensional pattern. Y3-1 Fault blocks in Shengli Oilfield, with oil-bearing area 15 km2, and geologic reserve 719.5×104 t, has disadvantages of small fault blocks, many oil layers, severe nonhomogeneity and complex oil-water relationship. Basing on the combination between crossing fault horizontal well surrounding water cone horizontal well, crossing fault block multiple target point complex wells and well completion with cementing pattern and develop technology, tridimensional optimization, the recovery can be improved. Comprehensive measures in well completion and cementing were adopted to meet the requirement of tridimensional development by increasing the cement bonding quality of the first interface and second interface.