To enhance interpretability, the SHAP framework was utilized like a video game-idea–primarily based process that assigns Each and every characteristic a measurable influence on predictions.
Top of fracture: width of fracture entrance = 6: 1, the coincidence diploma on the indoor and industry drilling fluid lost control effectiveness is high, along with the analysis result's good
YK and CX generally contributed to the look of the analyze. XY and CL predominantly contributed to the Business from the database. All authors contributed to manuscript revision, and read and permitted the submitted Edition.
The results exhibit that when the single strain maximize is five MPa, the drilling fluid lost control performance is the highest in accordance with the field, along with the analysis result of the drilling fluid lost control effectiveness is “excellent.�?When The one force raise is one.twenty five MPa, the drilling fluid lost control performance is the bottom in correspondence with the sphere, plus the evaluation result of the drilling fluid lost control efficiency is “poor.
Nonetheless, when evaluating the influence and talent of lost control, single or numerous indicators are largely made use of, which produce the analysis final results becoming not systematic, adequate, and exact. As a way to comprehensively Consider the effect and ability of drilling fluid lost control in fractured formations, this paper provides an experimental analysis approach to the drilling fluid lost control effectiveness thinking about loss forms. By analyzing the control effectiveness and most important control components of drilling fluid loss, the relative excess weight ratio of principal control things is described. Depending on the coincidence degree on the indoor and area drilling fluid lost control effectiveness, the realistic fracture module parameters and experimental techniques for indoor evaluation in the drilling fluid lost control performance are place forward, and after that, the applying tactic of your experimental evaluation way of the drilling fluid lost control effectiveness in fractured development is shaped. By the sector exam in Block K during the Tarim Basin, the feasibility of this technique is confirmed, delivering Tips for area drilling fluid lost control.
Determine 26. Time required for parallel fracture and wedge fracture of different widths to reach stable loss.
For the final R worth, confer with Table eight to find out the grading results of the lost control means from the plugging slurry system.
The plugging result relies on the fracture propagation force and plugging zone energy. For this type, the improving drilling fluid lost control efficiency must focus on plugging Procedure time and plugging depth.
The impact of fracture module parameters and experimental ways to the drilling fluid lost control effectiveness is studied by only one component. Determined by the Evaluation of the coincidence degree between the indoor and subject drilling fluid lost control efficiency, the ideal indoor experimental conditions for differing kinds of losses are established. Then, an indoor crack plugging simulation experiment is performed, plus the evaluation result of the plugging system is obtained in order to manual the indoor analysis of the field lost control.
Evaluating the variations in instantaneous and steady loss premiums at various drilling displacements, the primary difference while in the inflow and outflow of drilling fluid monitored on website responds in a shorter time interval. Inside the steady loss stage, it truly is tough to drilling fluid formulation detect the difference between the main difference in inflow and outflow, the modify in the full quantity of drilling fluid, along with the transform in liquid level height. From Figure 11c, it can even be found that the slope in the overbalanced stress along with the modify worth of standpipe stress is small, and the difference in loss fee for the steady loss phase beneath unique drilling displacements is smaller, so discipline drilling normally reduces the drilling displacement to evaluate the loss amount of drilling fluid, though lessening the use of drilling fluid and guaranteeing the accuracy on the measurement on the loss charge of drilling fluid.
Lost returns or mud loss is usually a partial or entire loss of circulation in the nicely. It’s a typical downhole challenge in areas like the center East, North Africa, and Latin The us. Being an estimate, lost returns account for approximately ten% of non-successful time around the globe.
These a few essential indexes are characterized via the force bearing capability, First loss, and cumulative loss within the laboratory.
The pressurization approach has no sizeable impact on the experimental evaluation benefits from the drilling fluid lost control performance
The outcomes demonstrate the lost control effectiveness with the plunger drilling fluid using a fracture peak of eighteen mm is in the very best arrangement with the sector effects, as well as evaluation result of the drilling fluid lost control effectiveness is “very good.�?The lost control effectiveness with the plunger drilling fluid which has a fracture top of 10 mm has the bottom settlement with the sector effects, and the analysis results of the drilling fluid lost control efficiency is “normal.