الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
The present thesis deals with studying the mud logging real-time data while drilling to improve the quality of the gathered data and propose a new early kick detection method. In addition, focusing on pore pressure prediction while drilling using mud logging data and measurements while drilling (MWD) in order to compare the obtained results with the calculated pore pressure after drilling using wireline data and repeated formation tester (RFT). Hence the following observations are of special importance: 1. Comparisons of three mud logging company systems were achieved as follow: time database comparison, depth database comparison, and gas chromatograph comparison. 2. The late kick detection can increase the amount of formation fluids that enters the well borehole. It leads to uncontrolled blowout, lose circulation, waste time and losing the hole section. Consequently, costs the oil industry billions of dollars a year, as well as more serious consequences of injury and potential loss of life. 3. The mud logging real-time data provides at least seven parameters that can be used for kick detection. 4. The studied cases show that small kick and the near-balance state can be detected early using the proposed advanced early kick detection method. 5. The formation pore pressure of the studied area has been evaluated through the integration of the mud logging and petrophysical data to deduce overpressure zones. 6. The study was ended with many important recommendations as follows: Pore pressure study recommendations: - The pore pressure estimated from resistivity is affected by the change in the formation fluid salinity. - The proposed sonic method gives better pore pressure calculations in both shallow and deep depths compared to modified Eaton’s sonic method. - This big interval VSP gives low quality pore pressure estimations. - The calculated pore pressure from sonic affected by the calcareous shale in the Early Miocene and read underestimation. To overcome this problem, it is recommended to build adapted sonic trend line to the calcareous shale in each field. Gas trap quality control recommendations: - The gas trap position should be close to the flow line as much as possible to minimize gas escaping from mud before the gas trap. - The gas trap type and specifications should be kept constant for better meaningful analysis and well to well correlation. - Using the new generation gas trap which minimizes the change in gas readings due to fluid fluctuations. This new generation called the constant volume gas trap (CVT). Advanced early kick detection recommendations: - add two high accuracy pressure sensors (ranged from 0 to 2000 psi). - Slightly flow must be considered, do not consider the slightly flow as an effect of U-tube, do the safe action, close the well and record the pressure.