Calculating tectonic stress coefficient of formation with rock mechanics parameters and fracturing work data
The treatments in petroleum engineering are greatly affected by the value and heterogeneity of tectonic stress, which has direct influence on the distribution of horizontal principal stress. For example, the borehole wall sloughing in drilling and the unbroken reservoir in fracturing will hinder the construction program and add the construction cost. Therefore, basing on the mechanics analysis of linear elastic rock, the formula is established among the maximum and minimum horizontal stress with the tectonic stress coefficient, considering that horizontal principal stress is made up of the overburden gravitational stress component and the tectonic stress component. Then, the tectonic stress coefficient in the direction of the maximum and minimum principal stress can be calculated on the base of the rock mechanical experiment parameters and fracturing work data. According to the tectonic stress coefficient calculated by this method, the horizontal stress is computed in two wells which are located in the same tectonic zone of Santanghu Basin in Tuha oil field. It is indicated that the field data and the computational result fit well and the error is small. Hence, the tectonic stress coefficient could be used in stress analysis and fracturing design for other wells in the same regime. Also, the analysis method may be applied in other oil and gas field.
Ren Lan Zhao Jinzhou Hu Yongquan Zhang Wenchang
Southwest Petroleum University, Chengdu, Sichuan, P.R. China
国际会议
The Fifth International Symposium on In-situ Rock Stress(第五届国际岩石应力研讨会)
北京
英文
263-266
2010-08-25（万方平台首次上网日期，不代表论文的发表时间）