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本文论述了五十年代至今,确定地层破裂压力理论计算公式,都以均匀水平应力场为基础推导出来的。但石油地质构造应力场的研究证明,地层岩石实际处于非均匀水平应力场状态,这就造成目前使用的理论计算公式和实际情况一直存在着较大的偏差。文内简介了目前研究非均匀水平应力场地层破裂压力的途径,并提出根据压裂施工曲线反求地应力大小,进而计算非均匀围压下地层破裂压力的设想。
This paper discusses the theoretical calculation formula of stratigraphic burst pressure from the 1950s to the present, and derives it from the uniform horizontal stress field. However, the research on the stress field of petroleum geological structure proves that the stratigraphic rock is actually in the state of non-uniform horizontal stress field, which results in the great deviation of the theoretical formula and the actual situation. In this paper, we introduce the ways of studying the fracture pressure of formation in non-uniform horizontal stress field, and put forward the idea of calculating the stress of formation in reverse according to the fracturing construction curve, and then calculating the fracture pressure of formation under non-uniform confining pressure.