公开(公告)号：US20060223715A1

公开(公告)日：2006-10-05

申请号：US11337174

申请日：2006-01-20

申请人： Charles Svoboda ,  Raymond Ravitz ,  Mark Luyster

发明人： Charles Svoboda ,  Raymond Ravitz ,  Mark Luyster

IPC分类号： C09K8/52

CPC分类号： C09K8/52 ,  C09K8/32 ,  E21B37/00

摘要： A method of cleaning a wellbore prior to the production of oil or gas is disclosed, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake. The method may include the steps of circulating a breaker fluid into the wellbore, where the breaker fluid includes an aqueous fluid, a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting age, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.

公开(公告)号：US20060223714A1

公开(公告)日：2006-10-05

申请号：US11337167

申请日：2006-01-20

申请人： Charles Svoboda ,  Raymond Ravitz ,  Mark Luyster

发明人： Charles Svoboda ,  Raymond Ravitz ,  Mark Luyster

IPC分类号： C09K8/00 ,  E21B43/00

CPC分类号： C09K8/52 ,  C09K8/32 ,  C09K2208/26

摘要： A method of cleaning a wellbore prior to the production of oil or gas, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake is disclosed. The method may include circulating a breaker fluid into the wellbore, where the breaker fluid includes a non-oleaginous internal phase and an oleaginous external phase, where the non-oleaginous phase includes a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting agent, and the oleaginous external phase includes an oleaginous fluid and an emulsifier, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.