两任意夹角断层的井壁压力计算方法  

Algorithms for Pressure Transient Analysis in the Presence of Two Intercept Faults with an Arbitrary Angle

作　　者：王晓冬[1] 穆立婷 

机构地区：[1]中国科学院渗流流体力学所 [2]华北石油测试公司

出　　处：《油气井测试》1997年第2期10-12,16-74,共5页Well Testing

摘　　要：用镜像反演方法解决两相交直线断层的井壁压力问题有一定的困难，尤其对断层交角为nπ／m，目标井不在角平分线上，镜像反演方法常常不能成立。本文首先用Laplace变换和有限Fourier变换再通过反演得出解析式，此后给出了计算任意支角断层井壁压力的实时域解析公式及渐近分析结果。在实时域中形成速度快且准确的计算方法。并通过叠加方法加入井筒存储和表皮效应。本结果可对两任意夹角断层进行诊断和解释。It has som difficulties to solve the transient pressure problem for two intercept faults using image inversion,especially to the faults with alternate angle of nπ/m,and target well is not on the angle bisector,image inversionis often inapplicable. In this paper,analytical solutions for pressure transient analysis are presented in the presenceof two intercept faults with an arbitrary angle using both Laplace and Fourier transformations. Efficientalgorithms of the soutions are also denoted in real time domain. Simplified formula at early and long times areobtained through approximate analysis. Wellbore storage and skin may be considered by means of superposition.The results can be used to diagnosis and interpret well test data in the presence of two intercept faults with anarbitrary angle.

关 键 词：拉普拉斯变换 剪切断层 实时域 计算方法 井筒存储 趋肤效应 

分 类 号：TE3[石油与天然气工程—油气田开发工程]