【摘要】 精确的预测地层破裂压力不仅是钻井工程设计的基础,更是后期油气田经济高效开发的保障。提出一种地层破裂压力的三维计算与显示方法,在有限的勘探资料和已钻井资料前提下,确定使用更适应于工程实际的侧压力系数法计算单点的地层破裂压力,运用克里金插值方法将反演密度数据和反演层速度数据相结合,计算每一道的地层破裂压力,最终再次运用克里金插值技术得出三维破裂压力体,并且设计出了地层破裂压力显示软件,直观反映出三维地层破裂压力分布。以新疆玛湖凹陷的玛西勘探区域为例,根据编制的相应计算程序,得到了该区域的三维破裂压力空间分布特征,并进行三维显示。然后提取该区域上单井的破裂压力计算结果与实测值进行对比,此方法符合工程需求。更多还原

【Abstract】 Accurate prediction of formation fracture pressure is not only the foundation of drilling engineering design,but also the guarantee in efficient development for later period of oil and gas field. A method of 3D calculation and display was proposed,under the premise of limited exploration data and drilled well information. Firstly,overburden pressure was calculated by density inversion data. Secondly,formation pore pressure was calculated by Seismic Interval Velocity inversion data. Finally,by using Kriging interpolation method to achieve three-dimensional formation fracture pressure,in addition,display software was disigned to reflect the distribution of three-dimensional formation fracture pressure directly. Maxi exploration region is taken for instance in Mahu exploration,spatial distribution characteristics of three-dimensional formation fracture pressure in this region was calculated and aehieved by the analogue computing program compiled. Then according to the different region and horizon,comparing the calculation results with the measured values of single-well fracture pressure gradient have been drilled in this region. This method effectively improves the calculation accuracy of three-dimensional formation fracture pressure in this region and provides an effective basis for the subsequent construction and development.更多还原