基于地震弹性属性变化率的水平井风险预测方法及装置
By using a method based on the rate of change of seismic elastic properties, faults and fractures in shale oil horizontal wells are predicted, solving the problem of poor identification of complex faults in existing technologies, optimizing drilling engineering design, and reducing drilling risks and costs.
CN117331120BActive Publication Date: 2026-07-17PETROCHINA CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2022-06-24
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies are ineffective at identifying complex faults, leading to complex drilling fluid loss during shale oil horizontal well drilling. This can easily cause wellbore collapse, stuck pipe, and overflow accidents, increasing drilling costs and time.
Method used
Based on the rate of change of seismic elastic properties, the risk of horizontal wells can be predicted by determining the formation P-wave impedance properties, fracture opening degree and formation risk probability, and the drilling engineering design can be optimized to avoid accidents.
Benefits of technology
Effectively identify faults and fractures in shale formations, reduce drilling fluid loss and wellbore collapse risks, optimize drilling engineering design, and reduce drilling cycles and costs.
✦ Generated by Eureka AI based on patent content.
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Abstract
本文涉及石油勘探领域，尤其涉及基于地震弹性属性变化率的水平井风险预测方法及装置。该方法包括根据地震数据、测井数据、地震解释层位信息，确定地层纵波阻抗属性；根据所述地层纵波阻抗属性，确定地层弹性属性变化率及裂缝开启程度；根据所述裂缝开启程度、所述地层弹性属性变化率，确定地层风险概率；根据地层风险概率，确定水平井风险。本方案通过地震弹性属性变化率，预测页岩油水平井轨迹中可能遇到的断层 / 裂缝等复杂地质情况，通过预测沿井眼轨迹中某井深处钻井液漏失及井壁坍塌风险，有利于针对该井深制定相应事故复杂的预防措施，从而有效避免事故复杂处理时间或避免事故复杂发生，并有利于降低钻井周期和钻井成本。
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