水平井现场决策系统与应用

On-site decision system for horizontal well and its application

大港埕海油田采用人工岛与人工井场开发,受地面井场条件限制,以井口槽为基础,以水平井及大斜度井为主进行开发。由于存在井网较稀、井型复杂、地下靶点位移大等问题,仅靠室内研究成果难以保证新井实施效果,需要开展现场随钻分析,及时决策。在大港埕海油田水平井实施过程中,通过不断探索,提出了水平井随钻分析技术方法。该方法以石文地质研究软件为平台建立水平井现场决策系统,实现室内研究与现场随钻分析无缝连接,将地震、钻井、录井、测井、模型等数据综合运用,解决了水平井实施现场快速决策难题。另外,对不同钻井条件下角度与厚度的关系进行了探讨,方便现场角度控制。水平井现场决策系统在埕海油田得到规模应用,效果显著。

Chenghai Oilfield in Dagang is developed by artificial island and artificial wellsite, which is restricted by ground wellsite conditions. Based on wellhead slot, this oilfield is mainly developed by horizontal well and highly deviated wells. Because of low well spacing density, complex well type and large target displacement indoor research alone is difficult to guarantee the implementation effect of new wells, and it needs the on-site drilling analysis to make decisions timely. In the process of implementation of horizontal well, the drilling analysis methods of horizontal well are proposed through a long time exploration. Taking Shiwen geological software as a platform, the on-site decision system of horizontal well is built, which makes the seamless connection for indoor research and on-site drilling analysis come true. The comprehensive application of seismic, drilling, logging the data and model solves the problem of the on-site implementation and rapid decision of horizontal well. In addition, the relationship between angles and thickness under the different drilling conditions is discussed in order to control angle on-site. The effect of scale application of this system is significant in Chenghai Oilfield.