水平井地质导向技术在复杂河流相油田中的应用——以曹妃甸11-1油田为例

水平井地质导向技术首先建立钻前地质导向模型，并根据评价井的测井资料，对随钻测井（LWD）曲线及可能钻遇的地层岩性进行预测。钻井过程中，在钻前地质导向模型基础上，根据钻井时LWD不同的测井响应和综合录井资料，实时验证构造和储集层信息，不断修正地质导向模型，对靶点深度进行实时预测，及时调整靶点，实现水平井的钻井目的。水平井导向包括2个关键步骤：水平井着陆的导向和水平段钻进过程中的导向。曹妃甸11-1油田开发大量采用了水平井，在水平井钻井过程中，根据目的层油藏类型和不同构造、储集层特征，确定了相应的水平井着陆和水平段钻进的导向原则，保证了水平井精确中靶并使水平段最大限度地穿越储集层，与传统导向技术相比，大幅度提高了水平井钻井成功率。图3参13

Application of geo-steering technique of horizontal well in complex fluvial reservoir-A case from Caofeidian 11-1 Oilfield

In the geo-steering technology,a reservoir navigation model is built,with which the anticipated formation lithology and LWD logging are simulated based on the appraisal wells data.While drilling,the modeled structure and reservoir are validated constantly from the real-time LWD and the compound logging.The model is updated repeatedly according to the penetrated information.The target depth is diagnosed and the target data is adjusted accordingly to make sure the horizontal well successful.The technology has two key steps: geo-steering to land the horizontal well and reservoir navigation to the horizontal section.Horizontal wells are applied in the development practice of the Caofeidian11-1 Oilfield.Different geo-steering rules are made for landing and horizontal section drilling based on different reservoir type,structure and container rock characteristics.They provide a powerful guarantee for perforating reservoirs and increase the success ratio of horizontal well drilling in comparison with the conventional technology.