CAJ | 학술논문

对地层压力的计算准确与否直接影响科学探索井钻井工程设计和正常施工，因而成为科学探索井的一个技术关键。本文在对地层上覆压力、孔隙压力及破裂压力有关计算模式理论研究分析基础上，结合科学探索井的施工实际情况，对压力计算模式进行了优选；建立了综合的钻前、随钻及钻后各环节压力计算的系统化、精确化方案；对计算破裂压力的一些关键参数转换模式进行了探索；形成了压力数据处理系统软件。通过在几口科学探索井进行实际应用，表明能够使地层压力的计算逐步精确化。
대지층압력적계산준학여부직접영향과학탐색정찬정공정설계화정상시공，인이성위과학탐색정적일개기술관건。본문재대지층상복압력、공극압력급파렬압력유관계산모식이론연구분석기출상，결합과학탐색정적시공실제정황，대압력계산모식진행료우선；건립료종합적찬전、수찬급찬후각배절압력계산적계통화、정학화방안；대계산파렬압력적일사관건삼수전환모식진행료탐색；형성료압력수거처리계통연건。통과재궤구과학탐색정진행실제응용，표명능구사지층압력적계산축보정학화。
This paper discusses methods used to estimate formation pressurein the scientific exploratory well. The optimum method was established for pressure calculation before,while and after drilling,which made the best use of geologic, seismic,logging, drilling,leak-off test,RFT and well kicks data,making the pressure calculation and analysis more systematic and more precise with each stage of drilling processes. The associated software package was developed to process formation pressure for practical wildcat planning and drilling. The difficulty of establishing accurate normal trend line was solved by recalculation and revision using RFT and well kicks data. MWD/LWD or log data was analyzed thoroughly to give as much information as possible for pressure calculating.Some models and methods for key parameters conversion(such as bulk density,shear wave velocity,shale contents and porosity both in permeale and impermeable formation)were developed in case of wanting,calculating from known measurements.