The first exploration oil well in any oil block consumes in general more time and cost than the\nother wells in the same block. Evaluating the drilled wells serves to improve the future operations.\nThis paper evaluates the drilled surface section through real field data for the first exploration oil\nwell drilled in one of the oil blocks, in Kurdistan north of Iraq. The surface section of the well was\ndrilled with the conventional method to penetrate many different geological formations with tight\nintervals. Drilling efficiency and the difficulties encountered are discussed and explained using\nvarious data sources. All daily drilling reports concerning a specific interval were studied. This includes\nweight on bit, string rotation, mud pump flow and penetration rate. Evaluation was carried\nout by analyzing the used controllable drilling parameters with the formations features. Penetration\nof the Pila Spi formation (Middle Eocene) was the most difficult formation in the drilled section.\nMicrosoft Office 365 Pro Plus used in making graphs and Excel tables. Evaluations showed\nthat the conventional technology used left many negative effects, like increase in None Productive\nTime NPT, cost and ground water pollution. Simultaneous Casing Drilling method proposed as an\nalternative method for the future campaign.
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