水平井技术在薄层低渗透油藏开发中的应用

欢喜岭油田欢2-11-13块为低孔低渗储层,平均油层有效厚度3.9 m,利用直井开发钻井成本高、井网密度大、储量控制程度低、开发效果差。水平井开发的可行性论证认为,薄层低渗油藏适合部署水平井,可充分发挥水平井与油层接触面积大、产量高的优势。水平井投产后,单井平均日产油17.9 t,是周围直井的9.0倍,达到了改善开发效果的目的,同时为今后同类型油藏开发提供了借鉴和指导。

Application of horizontal well technology in low permeability reservoir with thin layers

Huan2 - 11 - 13 block of Huanxiling oilfield is a low permeability and low porosity reservoir, and the average effective thickness of oil layer is 3. 9m. By using vertical wells, lager well spacing density, lower degree of single well reserves control and higher drilling costs will be the problems. After feasibility demonstration, horizontal well technology is believed to be suitable for low permeability reservoir with thin layers, because the technology can bring its advantages into full play such as higher production and larger contact area between horizontal well and oil layers. When it is put into production, the average oil production will be 17. 9t per day, which is 9 times of that in vertical wells nearby. At the same time, the development improvement will provide good reference and useful guidance for reservoirs of the same type in the future.