학술논문
基于物理模拟实验的超压碳酸盐岩电性特征与应用 / Electrical Characteristics and Application of Overpressure Carbonate Rock Based on Physical Simulation Experiment
Document Type
Academic Journal
Author
鲍一遥; 朱奕龙; 王晓龙; 刘宇坤; 万泽鑫; 赵森; 张佳丽; 周文轩; 虞华标; 谢鸿翔; BAO Yi-yao; ZHU Yi-long; WANG Xiao-long; LIU Yun-kun; WAN Ze-xin; ZHAO Sen; ZHANG Jia-li; ZHOU Wen-xuan; YU Hua-biao; XIE Hong-xiang
Source
科学技术与工程 / Science Technology and Engineering. 23(34):14547-14554
Subject
Language
Chinese
ISSN
1671-1815
Abstract
为解决传统碎屑岩超压预测模型和方法不适用于具有刚性岩石骨架的碳酸盐岩地层超压预测难题,通过超压碳酸盐岩岩石物理模拟实验,分析岩石电性参数对不同压力的响应特征;模拟地层在封闭压力系统条件下,致密碳酸盐岩孔隙流体发育超压引起孔隙度增大,电性参数响应特征明显,建立基于电性特征的碳酸盐岩超压预测模型;开展典型地区单井碳酸盐岩地层超压预测应用研究,结果表明:超压碳酸盐岩地层孔隙压力增加,孔隙流体膨胀,岩石骨架受到压缩,孔隙体积增加,岩石孔隙度增大;超压碳酸盐岩地层孔隙度增大,导电离子通过岩石的通道增大,导电性变好,电阻率变小,孔隙度的变化量与岩石电性参数变化之间存在明显相关性;基于电性参数对超压的响应特征建立了碳酸盐岩超压预测模型,通过实例验证取得了较好的应用效果.可见电性参数对碳酸盐岩超压具有明显响应特征,未来可进一步研究利用地震资料与电性参数的相关性,实现三维区域碳酸盐岩地层钻前超压预测.
In order to solve the problem that the traditional clastic rock overpressure prediction model and method are not suitable for the overpressure prediction of carbonate formation with rigid rock skeleton, through the rock physical simulation experiment of over-pressure carbonate rock, the response characteristics of rock electrical parameters to different pressures were analyzed. Under the con-dition of closed pressure system, the porosity of tight carbonate rock increased due to the development of overpressure in pore fluid, and the response characteristics of electrical parameters were obvious. The prediction model of carbonate rock overpressure based on electri-cal characteristics was established. The applied research on overpressure prediction of single well carbonate formations in typical areas was carried out, and the results show that. The pore pressure of overpressured carbonate formations increases, the pore fluid expands, the rock skeleton is compressed, the pore volume increases, and the rock porosity increases. The porosity of overpressure carbonate for-mation increases, the channel of conductive ions through the rock increases, the conductivity becomes better, and the resistivity be-comes smaller. There is a significant correlation between the change of porosity and the change of rock electrical parameters. Based on the response characteristics of electrical parameters to overpressure, the prediction model of carbonate overpressure is established, and good application effect is obtained through example verification. It is concluded that the electrical parameters have obvious response characteristics to the overpressure of carbonate rocks. In the future, the correlation between seismic data and electrical parameters can be further studied to realize the pre-drilling overpressure prediction of carbonate rocks in three-dimensional regions.
In order to solve the problem that the traditional clastic rock overpressure prediction model and method are not suitable for the overpressure prediction of carbonate formation with rigid rock skeleton, through the rock physical simulation experiment of over-pressure carbonate rock, the response characteristics of rock electrical parameters to different pressures were analyzed. Under the con-dition of closed pressure system, the porosity of tight carbonate rock increased due to the development of overpressure in pore fluid, and the response characteristics of electrical parameters were obvious. The prediction model of carbonate rock overpressure based on electri-cal characteristics was established. The applied research on overpressure prediction of single well carbonate formations in typical areas was carried out, and the results show that. The pore pressure of overpressured carbonate formations increases, the pore fluid expands, the rock skeleton is compressed, the pore volume increases, and the rock porosity increases. The porosity of overpressure carbonate for-mation increases, the channel of conductive ions through the rock increases, the conductivity becomes better, and the resistivity be-comes smaller. There is a significant correlation between the change of porosity and the change of rock electrical parameters. Based on the response characteristics of electrical parameters to overpressure, the prediction model of carbonate overpressure is established, and good application effect is obtained through example verification. It is concluded that the electrical parameters have obvious response characteristics to the overpressure of carbonate rocks. In the future, the correlation between seismic data and electrical parameters can be further studied to realize the pre-drilling overpressure prediction of carbonate rocks in three-dimensional regions.