CPC E21B 47/095 (2020.05) [E21B 33/165 (2020.05); E21B 23/04 (2013.01)] | 17 Claims |
9. A method for cementing a borehole penetrating subterranean formation, comprising:
(i) installing a casing string into the borehole wherein the casing string comprises pipe joints;
(ii) installing a pressure data acquisition system at a wellsite and at least one pressure transducer at a wellhead;
(iii) placing a top cementing plug inside the casing string;
(iv) pumping a displacement fluid behind the top cementing plug causing the top cementing plug to travel through the casing string and pass through the pipe joints generating a pressure pulse due to a difference in the diameter of pipe joints from casing string diameter, wherein the generated pressure pulse generates recordable pressure data;
(v) using the pressure transducer to detect the pressure pulse and transmit pressure data to the pressure data acquisition system, the pressure data comprising pressure pulse propagation velocity and reflection time; and
(vi) determining the position of the top cementing plug and processing the pressure data mathematically using cepstral analysis.
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