碳酸盐岩地层超压预测模型研究及应用  

Research and Application of Overpressure Prediction Model in Carbonate Formations

作　　者：陈云巧 王琳霖 王晓龙[1] 徐雯 刘宇坤 万泽鑫 鲍一遥 蔡宁波 Chen Yunqiao;Wang Linlin;Wang Xiaolong;Xu Wen;Liu Yukun;Wan Zexin;Bao Yiyao;Cai Ningbo(Key Laboratory for Oil and Gas Resources and Exploration Technology(Yangtze University),Ministry of Education,Wuhan,Hubei 430100,China;Sinopec Petroleum Exploration and production Research Institutc,Beijing 100083,China;Geophysical and Geochemical Survey Institute of Hunan,Changsha,Hunan 410014,China)

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100 [2]中国石化石油勘探开发研究院,北京100083 [3]湖南省地质新能源勘探开发工程技术研究中心,湖南长沙410014

出　　处：《特种油气藏》2024年第2期76-83,共8页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“超压碳酸盐岩弹性波速度研究”(41702135)。

摘　　要：碳酸盐岩地层超压预测是目前国内外尚未解决的基础性难题。以川东北地区超压碳酸盐岩地层为研究对象,通过物理模拟实验研究碳酸盐岩弹性参数随围压和孔压的变化规律,提出了基于岩石孔隙压缩系数的碳酸盐岩地层超压预测模型。实验结果显示,碳酸盐岩孔隙度的增大和岩样弹性参数变化与孔隙压力增量之间存在一定的相关性,据此建立岩石孔隙压缩系数与孔隙压力、孔隙体积的理论关系,并推导出超压预测模型,模型考虑了区域构造应力的影响,参数可以通过实验和测井资料获得;利用密度、声波和中子测井资料开展典型钻井超压预测,预测结果与实测压力吻合良好。新提出的超压预测模型为碳酸盐岩地层超压预测提供了新思路。The prediction of overpressure in carbonate formation is a basic problem that has not been solved at home and abroad.Taking the overpressure carbonate formation in northeast Sichuan as the research object,the variation law of elastic parameters of carbonate rocks with confining pressure and pore pressure is studied through physical simulation experiments,a prediction model of overpressure in carbonate formation based on pore compressibility is proposed.The experimental results show that there is a certain correlation between the increase of porosity of carbonate rocks and the change of elastic parameters of rock samples and the increment of pore pressure,based on this,the theoretical relationship between pore compressibility,pore pressure and pore volume of rock is established,and the overpressure prediction model is derived,using density,Sonic and neutron logging data to predict the overpressure in typical drilling,the predicted results are in good agreement with the measured pressure,the new overpressure prediction model provides a new idea for overpressure prediction of carbonate formation.

关 键 词：超压预测模型 碳酸盐岩地层 孔隙压缩系数 物理模拟实验 

分 类 号：TE133[石油与天然气工程—油气勘探]