三维地质导向在地质工程一体化实践中的应用

发布时间：2018-02-03 11:38

本文关键词： 三维地质导向地质工程一体化非常规水平井钻井品质页岩气致密油　出处：《中国石油勘探》2017年01期 　论文类型：期刊论文

【摘要】：随着非常规油气藏水平井提产、降本、增效需求的提高,地质工程一体化已经成为必不可少的勘探开发策略。非常规水平井钻井面临着来自地质和工程多方面的挑战。为了实现产能突破和效益开发,并且出于降本和提早建产的实际需求,非常规油气藏多采用水平井进行早期开发,地质上的不确定性不仅影响了水平井的钻遇率,同时增加了施工风险,降低了钻井时效。在工厂化、集约化的布井指导思想下,轨迹形态复杂的大位移三维井成为必然,进一步增加了钻井施工难度。实践证明,只有采用高效的地质导向方法,优化水平井轨迹,才能够在保证甜点钻遇率的同时,降低钻井风险,保证有效完井改造,实现效益开发。三维地质导向是建立在地质工程一体化理念上的新一代导向方法,其核心是地质导向模型重构和高精度三维地质建模,发挥"井工厂"的优势,利用水平井作为控制提高模型精度,为钻前轨迹设计优化、实钻地层预判和轨迹预调提供支撑。三维地质导向是不依赖于随钻测井工具的独立的地质导向方法,能够显著降低钻井成本,在中国页岩气和致密油水平井钻井实践中取得了良好的效果。
[Abstract]:With the production of horizontal wells in unconventional oil and gas reservoirs, the cost is reduced, and the demand for efficiency is increased. Geological engineering integration has become an indispensable exploration and development strategy. Unconventional horizontal well drilling is faced with many challenges from geology and engineering. In order to achieve productivity breakthrough and benefit development. Due to the actual demand of cost reduction and early production, unconventional oil and gas reservoirs mostly use horizontal wells for early development. Geological uncertainty not only affects the drilling rate of horizontal wells, but also increases the construction risk. Under the guiding ideology of factory and intensive well layout, it is inevitable that the long displacement 3D well with complicated trajectory is inevitable, which further increases the difficulty of drilling operation. Only by adopting the highly efficient geological guidance method and optimizing the horizontal well trajectory can the drilling risk be reduced and the well completion revamping be effective at the same time as the dessert-drilling rate is guaranteed. Realizing benefit development. Three-dimensional geological guidance is a new guidance method based on the concept of integration of geological engineering. The core of it is reconstruction of geological guidance model and high-precision three-dimensional geological modeling, giving play to the advantages of "well factory". The horizontal well is used as the control to improve the precision of the model, which provides the support for the design optimization of the pre-drilling trajectory, the prediction of the real drilled formation and the pre-adjustment of the trajectory. The three-dimensional geological guidance is an independent geological guidance method independent of the logging tools while drilling. The drilling cost can be significantly reduced and good results have been obtained in the drilling practice of shale gas and tight oil horizontal wells in China.
【作者单位】：中国石油集团川庆钻探工程有限公司川东钻探公司;中国石油浙江油田公司;能新科(西安)油气技术有限公司;中国石油新疆油田公司;
【基金】：中国石油天然气集团公司重大科技现场试验专项“浙江油田昭通示范区页岩气钻采工程技术现场试验”(2014F-4702)
【分类号】：TE24;TE271
【正文快照】： 常规油气田开发中地质研究往往扮演着指导工程施工的角色,而工程施工的主要任务是为地质研究服务并实现地质目标。非常规油气田开发面临更艰巨的工程任务,其产量和效益更大程度上决定于工程质量,特别是水平井钻井具有更多的困难和挑战。因此地质研究需要向支持工程的方向去转

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