| 摘要 |
Casing valves for selective well stimulation and control. A well system includes at least one valve interconnected in a casing string operable via at least one line external to the casing string to selectively control fluid flow between an exterior and interior of the casing string, and the casing string, valve and line being cemented in a wellbore. A method of selectively stimulating a subterranean formation, the method including the steps of: providing first and second wellbores intersecting the formation; positioning a first tubular string in one of the first and second wellbores, the first tubular string including multiple spaced apart first valves operable to selectively permit and prevent fluid flow between an interior and an exterior of the first tubular string; and, for each of multiple sets of one or more intervals of the formation, stimulating the interval set by opening a corresponding one of the first valves and closing the remainder of the first valves, flowing a stimulation fluid into the interval set, and in response receiving a formation fluid from the interval set into the second wellbore. Fig. 1 -34 22 24 26 ' 28 30 40 36 40 40 40 30 20 |
