吐哈油田牛东区块火成岩地应力研究及应用

Study and Application of Igneous Rock Stress in Block Niudong in Tuha Oilfield

地应力是储层压裂改造非常重要的参数,直接影响到压裂设计和施工。目前主要是利用区块已压裂井资料,或者小型压裂测试来判断地应力大小。小型压裂测试求取地应力最准确,但投入费用高。因此,该文从牛东区块利用已压裂井测井资料入手,通过岩石机械特性参数计算,对实际应力资料进行校正,得出了该区块地应力预测方法,该方法已被现场应用,取得较好效果。

Crustal stress is an important parameter to reservoir fracturing technology, which can effect on fracturing design and operation directly. The current method to decide the value of the crustal stress is fractured wells data or small-sacle fracturing test. Using small-scale fracturing test can obtain crustal stress more accuracy, but lead to a high cost. Starting with the fractured wells logging data of block Niudong, actual stress data is calibrated by calculating rock mechanical properties parameter. The crustal stress prediction method of block Niudong is obtained, which has a good effect in field application.