摘要：Wellbore breakouts and drilling-induced fractures(DIFs) which are usually used to determine in-situ stress magnitude and orientation can be recognized by formation microscanner image plot. An exploration well was drilled in a high temperature and low permeability formation, DIFs showed below 4240m depth and there were no breakouts nearly, Zoback's stress polygon model base on Anderson's faulting theory and Coulomb faulting theory cannot explain the failure phenomenon and determine in-situ stress states. In order to revise the method of stress determination, a thermo-poroelastic model was set up which took into consideration wellbore temperature variation because of drilling fluid circulation, the maximum principle stress magnitude had an upper and lower bound according to wellbore failure, meanwhile DIFs occurrence time was also a factor for stress calculation, so a series of charts including minimum effective tangential stress and damage coefficient were built to determine in-situ stress. It is stated that thermo-poroelastic model can explain wellbore failure and determine in-situ stress states comparing to elastic theory more properly. The research provides a theoretical method for determining in-situ stress by FMI plot especially for high temperature and low permeability wells.
Copyright 2016 ARMA, American Rock Mechanics Association.

卷、期、页：v 3,p1852-1860

发表日期：2016-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：50th US Rock Mechanics / Geomechanics Symposium 2016

通讯作者：曹文科,李扬,高佳佳

第一作者：邓金根,蔚宝华,谭强,刘伟

论文类型：会议论文

论文概要：曹文科,邓金根,蔚宝华,谭强,刘伟,李扬,高佳佳，A Revised method of in-situ stress determination from drilling-induced fractures: A case study of high temperature and low permeability formation drilling，50th US Rock Mechanics / Geomechanics Symposium 2016，2016，v 3,p1852-1860

论文题目：A Revised method of in-situ stress determination from drilling-induced fractures: A case study of high temperature and low permeability formation drilling