Analysis of Abnormal Pressure in Fracturing Construction of Horizontal Wells and Suggestions for Measures

Abstract

The tight sandstone reservoir in Daqing Oilfield has the characteristics of low porosity and low permeability, and the natural fractures are not developed, and the production requirements can only be met after horizontal well fracturing, but some horizontal wells have high construction pressure, low rate and large construction risk, so how to effectively reduce the pressure and improve the rate is the key to improve quality and efficiency. In this paper, the reasons for the abnormal construction pressure of the well are analyzed in detail from the aspects of geological and engineering factors. During fracturing construction, the net pressure is high, and perforation, multiple cracks, and in-situ stress are the main reasons for abnormal construction pressure. On this basis, the process methods such as optimizing perforation parameters, drilling orientation, and slug grinding are proposed, which provide valuable suggestions for the later development of the block.