| Development deployment | Sweet spot evaluation technique for tight conglomerate. | It provides the foundation for precise design and drilling for high quality sweet spot segment. It provides geological and engineering parameters for optimal fracturing design. | The drilling rate of horizontal wells reaches 96.8%. High drilling ratio in quality sweet spot. Section and cluster optimization of fracturing is one of the factors that increase the production of single well. |
| Optimal deployment technology of TSSD well pattern. | Through optimization design of well pattern, the purpose of increasing reserve utilization rate, single well production and recovery rate is achieved. | Reserve utilization rate reached 90%. Initial production of a single well is 30% higher than that of an older well. Recovery is more than twice that of an earlier
deployment. |
Optimized
drilling | High efficiency bit and speed- raising tool series technology. Borehole cleaning and drilling parameter optimization technology. Highly efficient drilling technology for industrial combination operation. | Increase drilling and completion
speed. Provide high quality
complete wellbore. | Mechanical drilling speed reached 14.8 m/h, with a 104% increase. Completion time reduced from 18 d to 6.9 d. The average drilling cycle of vertical segment is shortened by 6.5 d. Compared with the conventional way, the casing running time is saved by 15 h, and the friction is reduced by 150 kN. |
Fracturing
optimization | Proactive utilization technology of spatial stress field in stereo well pattern. Optimal size and shape fracturing optimization techniques. Industrial zipper
staggered fracturing technique. | Improve fracturing efficiency.
Increase the complexity of
fracture network. | The fracturing efficiency has been increased from level 3/d to level 5/d and up to level 9/d. Microseismic monitoring shows that the artificial fracture length decreases. The width of fracture network increases and the complexity of fracture increases. Single well production increases with a 50% reduction in spacing. |
Optimal
production | Shut in well balance and pressure control production technology. Stereo development of multiple collaborative optimization
technology. | Maximize the amount of resources between wells. Reduce the adverse effects of pressure interference and stress sensitivity caused by uncoordinated production. Greatly improve operation efficiency and production effect. | Oil soon comes into production. The production is higher than the average level of the whole region. The collaborative optimization between key elements and links is realized. Drilling and completion efficiency and fracturing efficiency are improved. Collaborative work standardization and implementation of the overall promotion in the Mahu oilfield are achieved. |