By Wan Renpu
As soon as a average gasoline or oil good is drilled, and it's been established that commercially plausible, it has to be "completed" to permit for the move of petroleum or normal gasoline out of the formation and as much as the skin. This strategy comprises: casing, strain and temperature evaluate, and the correct instillation of apparatus to make sure an effective movement out of the good. in recent times, those techniques were tremendously greater by means of new applied sciences. complicated good of completion Engineering summarizes and explains those advances whereas delivering specialist suggestion for deploying those new leap forward engineering structures. The booklet has issues: one, the belief of forestalling harm, and combating formation from drilling into an oil formation to placing the good creation degree; and , the usage of nodal method research technique, which optimizes the strain distribution from reservoir to good head, and performs the sensitivity research to layout the tubing diameters first after which the construction casing measurement, with a view to in achieving entire process optimization. With this ebook, drilling and creation engineers will be capable of increase operational potency through making use of the most recent cutting-edge know-how in all features of good final touch in the course of improvement drilling-completion and paintings over operations.One of the one books dedicated to the most important applied sciences for all significant elements of complex good of entirety activities.Unique insurance of all points of good final touch actions according to 25 years within the exploration, creation and crowning glory industry.Matchless in-depth technical suggestion for reaching operational excellence with improve strategies.
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Extra info for Advanced Well Completion Engineering, 3rd Edition
Generally, these minerals have a very small grain diameter (<20 mm) and distribute over the pore surfaces and throats where they may predominantly contact the foreign fluids. During the completion operations, the various foreign fluids interact easily with the fluids and minerals contained in the reservoir after invading, thus reducing the natural productivity or injectivity of the reservoir, that is, generating formation damage, of which the degree is indicated by the extent of reduction of the reservoir permeability.
Alkali Sensitivity Evaluation Experiment Concept of Alkali Sensitivity and Experimental Goals. The pH value of formation water is generally 4–9, whereas the pH values of most drilling and completion fluids and cement slurry are between 8 and 12. After the fluid with a high pH value enters the reservoir, the texture of clay minerals and siliceous cement in the reservoir is destroyed due to the dissolution of clay minerals and cement and the release of fine particles produced, thus causing reservoir plugging.
The rate sensitivity curves of kerosene and salt water, which are obtained by the tertiary reservoir cores of the Nanyang Xiaermen oil field, are shown in Figures 1-5 and 1-6, respectively. K1 is the original air permeability. 4 ml/min, respectively. Evaluation results of the 10 samples of this horizon are listed in Table 1-14. 5 ml/min, respectively. The degree of rate sensitivity damage of kerosene is obviously weaker than that of salt water. The reason is that reservoir rock is of weak water wettability to water FIGURE 1-5 Experimental curve of rate sensitivity of kerosene.