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本文由史密斯(Smith)等建立的泥岩超静水压力梯度与孔隙度、渗透率和流体粘度关系的微分方程出发,把沉积泥岩的压实作为埋深和时间的二维函数来研究,利用声波测井所取得的泥岩声速参数,定量地导出了在超静水压力的驱动下,压实流的流速、流量、流动系数等计算公式。从黄骅拗陷的沉积条件出发,研究了正、反韵律泥岩及泥岩垂向层序的流体压力特征和压实流的排替方向、能力等与烃类初次运移密切相关的参数。由多口钻孔的声波测井可组成反映泥岩压实史的综合压实曲线。笔者建立了歧口凹陷边部和中心部位的两条综合压实曲线,并结合有机质向烃类的转化的资料,研究了压实流排替史和烃类的排替史。
Based on the differential equation between the ultra-hydrostatic pressure gradient of mudstone and the porosity, permeability and fluid viscosity established by Smith et al., The compaction of sedimentary mudstone is studied as a two-dimensional function of depth and time. We obtained the parameters of mudstone velocity and sound velocity quantitatively and deduced the calculation formulas of velocity, flow rate and flow coefficient of compaction flow under the condition of ultra-hydrostatic pressure. Based on the sedimentary conditions in the Huanghua depression, the fluid pressure characteristics of vertical and anti-rhyme mudstone and mudstone, as well as the displacement direction and capability of the compaction flow and other parameters closely related to the initial hydrocarbon migration were studied. Acoustic logging from multiple boreholes can make up a comprehensive compaction curve that reflects the history of mudstone compaction. The author established two comprehensive compaction curves at the edge and central part of Qikou Sag. Based on the data of conversion from organic matter to hydrocarbon, the compaction flow history and hydrocarbon displacement history were studied.