Anti-Collision Risk Management for Real-World Well Placement

Poedjono, Benny; Chinh, Phan Van; Phillips, W.; Lombardo, Guy Joseph

doi:10.2118/121094-ms

Cited by 9 publications

(1 citation statement)

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“…For the past few years, the foreign drilling circles have proposed many explanations for separation factors, among which the one obtained by pedal curve method has been widely applied [8]. In 2009, Benny Poedjono raised the new concept of oriented separation factor (OSF) and presented method for calculating the oriented separation factor [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Application of Spatial Analytic Geometry in the Calculation of Adjacent Well Separation Factors

Diao¹,

Gao²

2015

Proceedings of the 2015 International Conference on Materials Engineering and Information Technology Applications

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Abstract. With the design distance between cluster well and infilling well continuously decreasing, the calculation of separation factor is of great significance in the adjacent well anti-collision problem. This paper contrasts the differences between the currently common pedal curve separation factor and the oriented separation factor and realizes the calculation of these separation factors by using spatial analytic geometry method separation factors, with the separation factor being defined in many ways. The comparative analysis shows that: in general case, the pedal curve separation factor is less than the oriented separation factor; when the reference point and scanning point are in the same spindle direction with the combined error ellipsoid, the former equals to the latter. In directional drilling project of infilling well where the inclinometer data on old well are of low reliability, it is better to consider the pedal curve separation factor as anti-collision basis; However, in the directional drilling project of cluster well where the inclinometer data on old well are of high reliability, it is better to consider the oriented separation factor as anti-collision basis.

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Section: Introductionmentioning

confidence: 99%

Application of Spatial Analytic Geometry in the Calculation of Adjacent Well Separation Factors

Diao¹,

Gao²

2015

Proceedings of the 2015 International Conference on Materials Engineering and Information Technology Applications

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Processing of the Passive Drilling-bit Ranging Signal Based on Wavelet Packet

Yang

Zhang

et al. 2021

J. Phys.: Conf. Ser.

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Recent technological advances have increased interest to acoustic ranging especially the passive acoustic ranging which is easier to operate in the oilfield. For analyzing the non-stationary drilling-bit signal, the conventional discrete Fourier Transform (DFT) has been known to be less efficient. A new extraction method based on wavelet packet (WP) is presented. In the signal processing, WP is used to decompose the original drilling-bit signal into the sub-frequency bands (SFBs). By analyzing energy spectrum of the SFBs, the first four SFBs are found that contain the characteristic of the drilling-bit, and the specific frequency band of the drilling-bit signal is determined after power spectrum analyzing. The field test shows that when the bit is near to the casing of the adjacent well, the reconstruction drilling-bit signal changes significantly which can give warning accurately.

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