塔北地区碳酸盐岩地层超压形成机制研究  

Study on the Formation Mechanism of Overpressure in Carbonate Strata in Tabei Region

作　　者：马金钰 张艳[1,2,3] 熊雨薇[1,3] 徐声驰[4] 夏国清 MA Jinyu;ZHANG Yan;XIONG Yuwei;XU Shengchi;XIA Guoqing(National Engineering Research Center for Oil&Gas Drilling and Completion Technology,Yangtze University,Wuhan,Hubei 430100,China;National Key Laboratory of Oil and Gas Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering,Wuhan,Hubei 430100,China;Mud Logging Branch,CNPC XDEC Geological Research Institute,Karamay,Xinjiang 834000,China)

机构地区：[1]长江大学油气钻完井技术国家工程研究中心,湖北武汉430100 [2]中国石油大学(北京)油气资源与工程全国重点实验室,北京102249 [3]油气钻采工程湖北省重点实验室,湖北武汉430100 [4]中国石油集团西部钻探地质研究院录井工程分公司,新疆克拉玛依834000

出　　处：《测井技术》2024年第4期527-536,共10页Well Logging Technology

基　　金：油气资源与工程全国重点实验室开放课题“页岩油储层井壁失稳机理及对策技术研究”(PRE/open-2307)。

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。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.

关 键 词：压力系数 成因机制 地层压力 Bowers法 塔北地区 

分 类 号：P631.84[天文地球—地质矿产勘探]