地层压力预测技术研究与应用

Research and application of formation pressure prediction technology

朱定 刘霞

Zhu Ding Liu Xia

中国石化 西北油田分公司勘探开发研究院,乌鲁木齐 830011 2. 中国石化 西北分公司油田特种管理中心,乌鲁木齐 830011

Research Institute of Petroleum Exploration & Production,SINOPEC Northwest Company,Urumqi,Xinjiang830012,China 2. Special Engineering Management Center,SINOPEC Northwest Company,Urumqi,Xinjiang 830011,China

分析了地层高压形成的原因,阐述了利用声波时差资料和地震速度进行地层压力预测的理论基础。通过研究和应用,比较了各种方法的优缺点。地层压力预测技术方法在塔河油田的应用,证明了预测方法的合理性与有效性。综合运用对比、等效深度法和Bowers提出的方法对地层速度具有较高的敏感性和负相关性,二者预测结果比较一致;而地震速度谱法进行地层压力预测只能预测大套地层压力的变化趋势。在初探区,利用速度谱法进行钻前压力预测,对于钻井效率和使用最佳泥浆比重安全钻井提供技术支持,具有较大的应用价值。

The reason for formation overpressure was analyzed.Interval transit time and seismic velocitywere used in formation pressure prediction and the theoretical basis was introduced.Through researchand application,the advantages and disadvantages of different methods were compared.Formation pres-sure prediction technology was practiced in the Tahe Oil Field,and proved correct and effective.Theequivalent depth method and the method proposed by Bowers were sensitive and inverse correlative toformation velocity,both serving well for prediction.The prediction method using seismic velocity couldsimply predict the changing trend of pressure of big formation.In wild-cat area,the seismic velocitymethod was used to predict pressure before drilling,improving drilling productivity and supporting safedrilling.

https://doi.org/10.11781/sysydz2011S1016