摘要
针对常规探井孔隙压力计算模型选择困难、计算参数反演误差大的问题,运用水力连通方法和断层稳定性方法完善计算参数,提高孔隙压力预测精度。结果表明:利用水力连通原理对参考井孔隙压力测试结果进行修正可以有效提高计算参数反演的精度;对于任意稳定断层,存在地层孔隙压力上限值,当断层倾角为65.2°时该值最小,该结论可用于进一步校正计算参数。实践表明,该方法预测的孔隙压力精度可达92.75%以上,具有良好的推广应用价值。
The conventional pore- pressure forecast in exploration well is challenged by model selection,big error of parameter inversion,etc. The hydraulic connectivity and fault stability methods are used to complete calculation parameters and improve the forecast accuracy of pore- pressure. Result illustrates that the inversion accuracy of calculation parameters can be greatly improved by using hydraulic connectivity principle to correct pore- pressure test data. There is a pore- pressure upper limit for any stable fault and the pore- pressure reaches minimum when the dip angle is 65. 2 °,which can be used to further correct calculation parameters. Practice indicates that the pore- pressure forecast accuracy of this method is up to more than 92. 75% with better economic and application value.
出处
《特种油气藏》
CAS
CSCD
北大核心
2016年第1期25-27,145,共4页
Special Oil & Gas Reservoirs
基金
国家自然科学基金"气体钻井井壁失稳与井眼净化机理研究"(51134004)
关键词
西湖凹陷
异常高压
孔隙压力预测
断层稳定性方法
水力连通方法
参数反演
West Lake Depression
abnormal high pressure
pore-pressure forecast
fault stability
hydraulic connectivity
parameter inversion
