基于XMAC资料的火山岩压裂储层应力分析技术

STRESS ANALYSIS OF VOLCANIC FRACTURING RESERVOIR BASED ON XMAC DATA

储层地应力大小和方位对指导压裂方案设计和施工工艺有着现实的意义。通过分析牛东构造的密度测井、声电成像及地层倾角和压裂曲线等资料,结合XMAC资料和岩心刻度测井研究了牛东火山岩储层的岩石力学特征、地应力大小和方位,建立了三维应力模型,绘制了单井应力剖面图、区域地应力分布图和区域地应力等值线图,用XMAC资料计算的地应力方位与由地层倾角得到的结果相一致,求取的压裂层段平均最小水平主应力值与压裂施工瞬时停泵时折算的压裂层段中点压力值基本吻合。

By means of analyzing the density logging, voice electricity imagery, stratigraphic dip and fracturing curve data of Niudong structure, and combining XMAC data and core scale logging data, the rock mechanical characteristics, ground stress and azimuth of Niudong volcanic reservoir were studied, and the 3-D stress model was established, and stress sectional drawing of individual well, area earth stress distribution plan and area stress chorisopleth were drawn. Based on XMAC data, calculated stress azimuth is the same as stratigraphic dip result, acquired average Min. level major stress value in fractured interval is in accordance with converted fractured interval midpoint pressure value in temporality pump off of fracturing operation.