Influential factors and propagation laws of hydraulic fracture height in the Hangjinqi Block

In the Hangjinqi Block, many sets of sandstone gas layers are vertically developed with relatively developed barriers and water layers are developed at the bottoms of several wells, so it is necessary to control the height of hydraulic fracture. The formula for calculating the S-wave time difference of Hangjinqi Block was established by analyzing dipole acoustic log data. Then, single-well rock mechanic and ground stress profiles were established. The geological and engineering factors influencing fracture height were analyzed by means of the orthogonal experiment design method. By analyzing the fracture height monitoring results, the propagation laws of fracture height were defined and the chart of the fracture height control based fracturing technology was established. Based on this, the method for designing the fracture height control based fracturing was developed. When it is applied on site, fracture height is under control and the target of avoiding penetrating the barriers to connect the water layers at the bottom is reached.