On June 8, the acidizing operation of Pengshen 6 Well, the deepest straight well in Asia, fully completed various design engineering indicators, made a major breakthrough in acidizing operation of ultra deep Carbonate rock rocks, and accumulated valuable field operation experience for ultra deep reservoirs.
Well Pengshen 6 is a pre exploration well of Southwest Oil and Gas Field Company located at the high part of the slope zone structure in central Sichuan Basin. The completed drilling depth is 9026 meters, and the target formation layer is Deng2. The reservoir is extremely deep, the bottom hole temperature is extremely high, and the reservoir fracture pressure is extremely high, which brings great challenges to the oil testing tools, the operation process and the working fluids. Southwest Oil and Gas Field Company adopts the integration of geology and engineering to ensure the smooth completion of oil testing work in this well.
Precise acquisition of logging data combined with Rock mechanics experimental correction to calculate the fracture pressure curve of the well, and identify the operation difficulties of ultra-high fracture pressure and difficult fracturing of Deng2; Through carrying out rock powder dissolution and Rock mechanics property degradation experiments, the acid solution immersion technology was optimized to reduce acid fracturing, and the fracturing pressure was reduced by more than 20%; Through over a hundred sets of acid corrosion and temperature resistance evaluation experiments, the composite organic resistance reducing acid system was optimized to meet the transformation requirements of long-term high-temperature construction at 200 degrees Celsius.
Post time: Jun-13-2023