海上低渗油藏水平井分段压裂技术研究

Study on fracturing technology of horizontal wells in offshore low permeability reservoir

低渗油藏储量在渤海湾油田所占比例较大,但低渗油藏特点导致原油采出困难,产量较低,造成开发价值大大降低。压裂技术是在地层中形成一条或多条高导流能力裂缝,改造地层物性,是低渗油藏开发的重要手段。水平井完井有利于增大油层暴露面积,提高产能。如果水平井采用分段压裂技术能够形成多条裂缝,更大程度释放产能,为未来渤海油田开发低渗油藏提供一种新的技术措施。本文以H油田为例,对水平井钻完井的工艺、施工参数、规模等进行研究设计,以指导现场施工作业。

The reserves of low permeability reservoirs in Bohai Bay oilfield are larger, but the characteristics of low permeability reservoirs lead to the difficulty of crude oil production and low production, which greatly reduces the development value. Fracturing technique is one of the most important methods for the development of low permeability reservoirs in the forma- tion of one or more high conductivity fractures. Horizontal well completion is beneficial to in- crease the exposed area and improve productivity. If the horizontal well is divided into multi- pie fractures by using the fracturing technology, the production capacity can be released to a greater extent, which provides a new technical measure for the deve ability reservoirs in Bohai oilfield in the future. In this paper, taking lopment of low perme- H oilfield as an exam- ple, this paper studies the design, construction parameters and scale of horizontal well drilling and completion in order to guide the field construction operation.