页岩油地质工程一体化关键技术研究与应用——以鄂尔多斯盆地三叠系延长组长7段为例

鄂尔多斯盆地陇东地区三叠系延长组长7段页岩油储层主要为深湖相泥页岩和重力流砂体的交互沉积,储层的分布在垂向和横向上均复杂多变,单砂体厚度薄,同时又受到天然裂缝的影响.针对该区页岩油开发中存在的井位部署、高效钻井和科学压裂等技术难题,提出了一套地质工程一体化解决方案.在综合地质研究的基础上,建立三维精细地质、油藏和地质力...

Research and application of key technologies of geology and engineering integration for shale oil development:a case study of Chang 7 member of the Triassic Yanchang Formation,Ordos Basin

The reservoir of Chang 7 member shale oil in Longdong area is mainly composed of interbedding layers of deep lacustrine shale and gravity-flow sandstone,which is characterized by strongly heterogeneous reservoir distribution vertically and laterally and thin single sand layer,with natural fractures developed.In view of the technical challenges in shale oil development,such as well location placement,high-efficiency well drilling and customized well stimulation,a complete set of geology and engineering integrated solution is proposed.Firstly,by applying the comprehensive geological study results,3D fine geological and geomechanical modeling and reservoir simulation are performed,and then well location selection,well-factory platform design,well drilling and geosteering schemes optimization are implemented to ensure that the well trajectory is reasonable and applicable,reservoir penetration rate is improved while well drilling and completion time is reduced;The combined geomechanical model and reservoir simulation enable the rational fracturing design and operation;In the flowback and production stage,a pertinent scheme is designed by considering the geological,oil reservoir,geomechanical and well completion conditions for fracturing operation to achieve the maximized single well production as well as a long-term cumulative production of the well block.