Foam the basic principles of fluid technology:
Bubble fluid is a compressible non-Newtonian fluid, with low density and easy to adjust, high viscosity, low friction, sand-carrying ability in the pore as easy to control bottomhole pressure, leakage reduction and pollution on the formation into the well fluid; medium with a high apparent viscosity, profile control ability, and has a shear-thinning properties, sealing ability increased with the penetration rate increases; water stability, and the case of oil defoaming in the oil medium variation in stability, seepage resistance is reduced with the rise of oil saturation; compression factor, the ability to cleanup characteristics. Widely used in low voltage, leakage and water sensitive formation drilling, completion, workover, and oil and gas well stimulation.
Bubble sand, wash well
With conventional fluid washed sand, wash well, into the well fluid of leakage and filter loss often will have oil and gas production layer caused a certain degree of pollution after the impact of job production energy for a number of missing a serious well, or even can not establish a normal wash well circulation. Bubble fluid can effectively address the issue. Bubble fluid sand, wash well has the following advantages:
Low foam density, low pressure or negative pressure cycle can be achieved to avoid loss;
The high viscosity of foam, a small amount of fluid loss, low liquid composition can greatly reduce the damage to the producing formation;
The suspension capacity of the foam, the bottom of the well and oil to bring out the solid particles of the casing wall or other dirt;
Induced efflux near wellbore dirt, to remove the middle layer of blockage, but also can induce the oil flow.
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Typical cases of well: 104-5 level 69 wells, horizontal section of the well is 1080 m, May 2007, I use the foam to the sand technology, the successful establishment of the cycle, the longest domestic wells, horizontal wells sand washing task. Jidong Oilfield in all walks of life spoke highly of.
Since April 2007 to the present, I bubble red sand, wash well technology, in Jidong Oilfield, Shengli Petroleum Development Center, a wide range of applications, the cumulative application of more than 100 wells, application results are obvious.