Optimization and Practice of Horizontal Well Reservoir Transformation in Tight Sandstone Gas Reservoirs Considering Geological Engineering Integration

The Jingbian tight sandstone gas reservoir has been evaluated and developed since 2015. Currently, the daily gas production distribution range of 124 horizontal wells is 0.7–29.8 × 104m3/d. There is a significant difference in development effects compared to neighboring areas with the same sedimentary background. In order to clarify the causes of the differences and improve single well production, geological engineering integrated parameter comprehensive benchmarking was carried out with adjacent blocks to optimize reservoir transformation technology and evaluate its effectiveness. Research has shown that: ① The reservoir properties, gas saturation, reserve abundance, and pressure coefficient of Jingbian tight sandstone gas reservoir are key factors affecting development effectiveness compared to neighboring areas; ② The better the geological conditions, the better the development effect with the same fracturing parameters; ③ When the geology and drilling encounter rate are relatively poor, the existing transformation mode cannot effectively transform reservoirs with relatively poor physical properties in the horizontal section. Increasing the scale of fracturing transformation has a good effect on improving the initial single well production;④ The implementation effect of dynamic adjustment of high-strength sand addition and dense cutting large-scale fracturing technology has increased by 14% compared to before.. The practical results show that adjusting the volume fracturing transformation mode and technical parameters based on the geological conditions of the completed well is an effective way to achieve full reservoir transformation and a powerful means to improve single well production.