摘要
鄂尔多斯盆地大牛地气田属于典型的低孔、低渗致密砂岩气藏,水平井分段压裂是经济高效开发气田的关键技术。针对现有水平井裸眼封隔器分段压裂工艺无法控制裂缝起裂位置、二次改造困难等问题,探索了固井滑套分段压裂工艺在大牛地气田的适应性,阐述了该工艺的技术原理、工具组合和工艺特点,并开展现场应用和压后分析。现场应用情况表明:固井滑套分段压裂工艺不仅能够实现水平井定点压裂,而且施工效率高,能够实现一天压裂改造10段。此外,该工艺采用环空压裂施工,施工摩阻低,工具性能好,施工成功率高,在大牛地气田以及国内其他致密低渗油气田具有较好的推广应用价值。
Daniudi gasfield of Ordos Basin is a typical tight sandstone gas reservoir with low porosity and permeability. Horizontal well with staged fracturing is the key technology for economical and efficient development. In order to solve the problems of uncontrollable fracture starting position and the secondary fracturing difficulties during open-hole packer staged fracturing,we analyzed the applicability of cementing sliding sleeve staged fracturing technology. This study describes the operation principle, tool sets, and characteristics. Moreover, we carried out field application and after-fracturing analysis. Results show that the technology not only can realize fixed-point fracturing, but also has high efficiency with fracturing completed for 10 intervals in one day. Furthermore, adopting annular fracturing, it has advantages of low friction of operation,good performance of tools, and high success ratio of fracturing. It is worth to be popularized to Daniudi gasfield or other tight reservoirs.
出处
《天然气勘探与开发》
2016年第4期59-63,共5页
Natural Gas Exploration and Development
关键词
大牛地气田
致密砂岩储层
水平井
固井滑套
连续油管
分段压裂
Daniudi gasfield
tight sandstone reservoir
horizontal well
cementing sliding sleeve
coiled tubing
staged fracturing
