Those following you demonstrate that you have a problem with fluid loss control.
1. Low electrical stability - Your drilling mud is not good emulsion.
2. High API fluid loss or high HTHP fluid loss - These tests indicate that you certainly do not have the right property fluid loss. In addition, you can see that there is water in the filtrate as well.
Why this happens?
1. Low fluid loss control additive - Without loss of control enough liquid chemical, you can get a high volume of fluid loss test.
2. low emulsifier - In your mud system, you might not have a concentration emulsifier enough to keep the mud in good shape. OBM should have good electrical stability (ES) over 700.
3. High temperature wellbore - Well drilling more temperate tends to deteriorate the sludge in several aspects, particularly the loss of control fluid.
How this is solved?
1. Add more fluid loss additive - Agents fluid loss will help create good filter cakes and reduce fluid loss . When you consider adding this additive , you must ensure that each chemical you add can keep the temperature down hole, otherwise you will lose your effort .
2. Add more emulsifier - Since emulsion is not fit , you must add more emulsifier and you can consider taking the time to shear the mud . You know you're having a good mud emulsion by testing the electrical stability (ES).
3. Add more lime -oil and water will mix well in a basic state must then add lime, because it will increase the alkalinity of the mud and improve emulsion .
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