【摘要】 塔北地区古生界碳酸盐岩地层异常压力普遍发育，地层存在多套压力系统。为提高塔北地区碳酸盐岩地层压力预测的精度，研究了该地区地层异常压力的成因。通过对塔北地区实测压力、测井曲线、声波速度—密度交会图、声波速度—垂向有效应力交会图、气测数据及地震资料的综合分析，表明深层碳酸盐岩地层纵向上发育常压、弱超压和超压系统。弱超压系统压力系数普遍大于1.10，部分超压点压力系数大于1.50，超压主控因素为构造挤压作用和生烃作用。选取引入超压成因机制的Bowers法对深层碳酸盐岩地层压力进行预测，与实测数据相对比，该方法预测的地层压力相对误差低于5.000%，预测精度较高，满足现场工程需求，对塔北及相似地区深层、超深层碳酸盐岩超压成因及压力预测研究具有指导意义。更多还原

【Abstract】 The Paleozoic carbonate formation in the Tabei region is commonly developed with anomalous pressure, and multiple pressure systems exist in the formation pressure. In order to improve the accuracy of pressure prediction in carbonate reservoirs in Tabei region, the causes of abnormal pressure in the reservoirs are studied. Through the comprehensive analysis of the measured pressure, logging curve, sonic velocity-density intersection diagram, sonic velocity-vertical effective stress intersection diagram, gas logging data and seismic data in the Tabei region, it is shown that the deep carbonate stratum develops normal pressure, weak overpressure and overpressure system in the longitudinal direction, and the pressure coefficient of the weak overpressure system is generally greater than 1.10, and the pressure coefficient of some overpressure points is greater than 1.50,and the main controlling factor of overpressure are tectonic extrusion and hydrocarbon production. The Bowers method is selected for the prediction of formation pressure in deep carbonate formation with the introduction of an overpressure genesis mechanism. Compared with the measured data, the relative error of the predicted formation pressure is less than 5.000%, which is of high prediction accuracy and meets the needs of field engineering, and is of guiding significance for the study of overpressure formation and pressure prediction of deep and ultra-deep carbonate reservoirs in the Tabei and similar region.更多还原