Well loss Risk Real-time Monitoring and Simulation Analysis of Key Parameters

The downhole engineering parameters measurement system(EPMS) can show the actual state in wellhole more intuitively, and significantly improve the accuracy of drilling construction decision. However, there was a big gap between domestic and foreign countries in the comprehensive management, analysis and processing of underground and surface drilling engineering parameters. For the well loss risk, the characteristic parameters were internal and external pressures, and the threshold limit values of well loss risk levels was selected, so the assessment system was established. Then through real-time processing and analysis of underground and surface engineering parameters, the characteristic parameters of the well loss risk was calculated real-time, according to the comparison of the calculated value and the measured value, and the assessment system, the wellhore risk level was monitored real-time. Beside the well loss depth could be calculated by these measured parameters, which was important for the well loss treatment. This technology was used in G1 well in GX blocks of Shengli oilfield, in which the well loss occurd frequently. The application result shows that well loss can be monitored at an early stage, reducing the cost of materials and processing the complex time.