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Zhou M.,South West Petroleum Bureau Cementing Company | Liang J.,China University of Petroleum - Beijing | Guo X.,East China Institute of Technology
Well Testing | Year: 2012

Two-dimensional unstable percolation mathematical model existing at the horizontal direction fault is described, and by using Green's function method and the superposition principle, the unstable pressure solution for horizontal well is derived and two forms of that are given. By introducing a new function, a fast solution method of calculating pressure is proposed; and by the Laplace transform, numerical inversion of Stehfest, down-hole pressure for horizontal well at real space is solved, avoiding the complex mathematical model of the inner boundary condition problem. By using MATLAB programming to Plot pressure plate, the influence of fault on well bottom pressure of the horizontal well is analyzed.

Jiao J.,Southwest Petroleum Bureau Cementing Company | Yao Y.,Southwest Petroleum Bureau Cementing Company | Shu Q.,Southwest Petroleum Bureau Cementing Company | Guo G.,Southwest Petroleum Bureau Cementing Company | Feng Y.,Southwest Petroleum Bureau Cementing Company
Drilling Fluid and Completion Fluid | Year: 2012

In this paper, the difficulties and treating methods of cementing in gas medium are introduced, such as casing and "U" pipe effect. The formulation of cement slurry is optimized that can be used to carry out cementing in gas medium. The application in cementing of φ 244.5 mm casing in well YL1 shows that the high quality percent rate of cementing job is 69.2%, which indicates that in gas medium, not only the cementing job term can be reduced, but also the cementing job quality can be improved sharply.

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