Zhao F.,Southwest Petroleum University |
Tang H.-M.,Southwest Petroleum University |
Wang S.-K.,Sinopec |
Qiu X.-J.,China National Petroleum Corporation |
Wang J.,Jinzhou Oil Production Plant
Xinan Shiyou Daxue Xuebao/Journal of Southwest Petroleum University | Year: 2011
The dynamic damage experiment of drill-in fluids in the laboratory is often completed in a short time, which does not correspond with actual drilling process. The article utilizes HTHP dynamic evaluation instrument to simulate the actual drilling process. We soak the core which is damaged by drill-in fluids into drill-in fluid filtrate for certain time, and bring it out to evaluate the affecting degree of different soaking time on reservoir return effectiveness. The experimental results show that, with the increasing of soaking time in the dill-in fluids filtrate, the return effectiveness of oil-based drill-in fluid have few variation, and the return effectiveness of polymeric alcohol drill-in fluid trend to decline; there is few variation in the process of soaking in a short time. On the contrast, the return effectiveness tends to decrease after a long time, and clay-free drill-in fluid trend to decrease. The influence of soaking time in drill-in fluids filtrate on return effectiveness is relative to the characteristic of drill-in fluids, reservoir characteristics, reservoir damage mechanisms and etc.
Zhao C.,Jinzhou Oil Production Plant |
Sui Y.,Jinzhou Oil Production Plant |
Wang H.,Jinzhou Oil Production Plant
Well Testing | Year: 2012
Shaped bullet perforating technology is researched and developed from perforating technology, especially based on compound perforation technology, which is the extension and development of compound perforation technology. In addition to 4 functions of perforating, perforating fracturing, eliminating compaction belt and cleaning channels, the bullet is blasted in the end trajectory, reducing the casing damage, the blasting of that can produce more than 70MPa detonation wave to make the layer to produce more cracks. In 2009, 6 wells at3 blocks in Huanxi oilfield were selected for shaped bullet perforating test, favorable result were obtained, the fluid production increased 7.9 times, the oil production increased 6.8 times, and the average fluid production for single well increased 30.8t.
Gu Y.,Jinzhou Oil Production Plant
Well Testing | Year: 2012
Aiming at problems of and vibration for the pressure gauge existing in operation of tubing conveyed perforating, the original blasting rod is improved, and a new pressure gauge system is designed. By application of the improved ignition rod and pressure gauge system, the problem of the shockproof pressure gauge is solved, which not only accurately measures energy of the liquid cushion into the formation after perforation, but also detects the explosion pressure and temperature change formed by the shell. The acquired data is more representative.