Economic Discussion on Reservoir Protetion Drilling Fluid Technology in Shell's Changbei Project
With the continuous growth of global energy demand and the gradual depletion of conventional oil and gas resources,the development of unconventional oil and gas reservoirs has become an important research direction in the field of petroleum engineering,and low cost is a necessary condition for achieving effective development.Good economic benefits can be only obtained by continuously improving the learning curve and striving to achieve the best balance of technology and cost due to low single well production,high completion and fracturing costs,and longer cost recovery period.The Changbei project,a collaboration between Changqing Oilfield and Shell,is a model project for global oil and gas exploration and development.The project has been consistently stable for 15 years and has produced a total of 590.8×108 m3 of gas to date.Its remarkable and fruitful achievements are the result of the joint efforts of multiple parties and the coupling of multiple factors.The article takes drilling fluid technology as the starting point and analyzes that although the optimization of drilling fluid performance leads to an increase in the cost per cubic meter of drilling fluid,but it has a positive contribution to the overall cost control and production capacity maintenance of the project.It intuitively demonstrates the impact of the technical learning curve on economic benefits.By analyzing the advantages and disadvantages of the"daily fee system"and"daily fee system+drilling footage fee system"management models in the first and second phases of the Changbei project,it is proposed that unconventional oil and gas development must focus on the combination of technology,cost,production,and management,consider overall benefits according to the project's entire life cycle,and pay attention to reservoir protection.The article summarizes the success of the Changbei project in order to provide reference for the development of unconventional oil and gas reservoirs.
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