Development Regularity and Influencing Factors of Horizontal Wells in Tight Conglomerate Reservoir

In recent years, exploration in the Junggar Basin Mahu area has been making breakthroughs. Horizontal well + volume fracturing is an economical and effective development method, the initial production capacity is high, but the rate of production decline is fast, the stable production period is short and so on. According to the classification and distribution characteristics of oil layers, the tight conglomerate reservoirs can be divided into three types and six types. Based on the method of correlation coefficient and grey correlation degree, combined with the dynamic analysis of actual production, it is clear that oil saturation, horizontal section length, permeability (vertical and horizontal permeability) and high-quality reservoir length are the main geologic factors affecting productivity. The production law of each horizontal well is analyzed by grouping, the horizontal section length, displacement, proppant dose and production of the engineering factors are obviously correlated after the analysis of the classification of reservoir and the length of drilled reservoir as the classification standard. By analyzing the development factors that affect the development of horizontal wells, it is found that the pressure-sensitive effect is obviously correlated with the production. Combined with the geological factors, engineering factors and development factors that affect the development law of horizontal well volumetric fracturing, it is determined that the main control factors affecting the development law of horizontal well volumetric fracturing are pressure sensitivity effect, length of oil zone drilled, length of horizontal section, propping dose, displacement and length of first-class oil layer, it lays a foundation for efficient fracturing and development of Mahu tight conglomerate reservoir.