Abnormal High Pore Pressure Prediction and Cause Analysis of Salt and Anhydrite Formation of Fauqi Oilfield in Iraq

Sheng Xiang Wang; Feng Lin; Fan Zhang; Jin Gen Deng; Bao Hua Yu; Yuan Cao

doi:10.4028/www.scientific.net/AMM.638-640.350

Paper Titles

Study on the Risks and Instability Factors of an Operating Reinforced Concrete Coal Storage Bunker
p.326

Failure Simulation of Single-Edge Notched Concrete Beam under Dynamic Tensile Loading
p.333

Analysis of the Research Status and Trends of Anti-Slide Pile with Prestressed Anchor Cable
p.338

A Semi-Analytical Method to Calculate the Consolidation Problem of the Soilbag Filled with Mud Soil Buried with PVD
p.345

Abnormal High Pore Pressure Prediction and Cause Analysis of Salt and Anhydrite Formation of Fauqi Oilfield in Iraq
p.350

Amelioration of Wolffersdorff Hypoplastic Constitutive Model Considering Intergranular Strain Tensor
p.355

Analysis about the Classification of Landslide Monitoring Method
p.360

Analysis of Distribution Characteristics and Reliability for Bearing Capacity of Piles
p.365

Analysis of Effective Length of Super-Long Pile
p.370

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 638-640Abnormal High Pore Pressure Prediction and Cause...

Abnormal High Pore Pressure Prediction and Cause Analysis of Salt and Anhydrite Formation of Fauqi Oilfield in Iraq

Abstract:

Abnormal high pressure exists in Lower Fars formation of Fauqi oil field in Iraq and lead to many complicated problems during drilling. There are salt, anhydrite and shale in Lower Fars formation through lithology analysis. Through the crossplot of sonic velocity vs. density data, it can be identified that the high pressure of Lower Fars is cause by the undercompaction of shale. Through composite analysis of different prediction methods of pore pressure, Eaton model is used to calculate the pore pressure of Lower Fars. The pore pressure begins to increase at the MB4 layer and declines to normal value at MB2 layer, and the peak is about 2.20 . The calculated results are in conformity with field situation, which can be applid to guide drilling practice in Fauqi oil field.

You might also be interested in these eBooks

Progress in Industrial and Civil Engineering III

View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volumes 638-640)

Pages:

350-354

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.638-640.350

Citation:

Cite this paper

Online since:

September 2014

Authors:

Sheng Xiang Wang, Feng Lin, Fan Zhang, Jin Gen Deng, Bao Hua Yu, Yuan Cao*

Keywords:

Abnormal High Pressure, Cause, Logging Data, Pressure Calculation, Salt and Anhydrite Formation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] Martin G B. Abnormal high pressure and environment of deposition. (1972).

Google Scholar

[2] Chaney P E. Abnormal pressures and lost circulation. Drilling and production practice, (1949).

Google Scholar

[3] Powell B N, Lovell G L. Mechanisms of chalk compaction. Rock Mechanics in Petroleum Engineering, (1994).

Google Scholar

[4] Rizvi A J, Saleh S T, Williams K. Automating Pore-Pressure Prediction in Subsalt Sediments. Offshore Technology Conference. Offshore Technology Conference, (2013).

DOI: 10.4043/24159-ms

Google Scholar

[5] Freire H L V, Falcao J L, Silva C F, et al. Abnormal Pore Pressure Mechanisms In Brazil. 44th US Rock Mechanics Symposium and 5th US-Canada Rock Mechanics Symposium. American Rock Mechanics Association, (2010).

DOI: 10.1201/noe0415444019-c63

Google Scholar

[6] Magara K. Permeability considerations in generation of abnormal pressures. Society of Petroleum Engineers Journal, 11(03), (1971), pp.236-242.

DOI: 10.2118/2896-pa

Google Scholar

[7] GlennL Bowers. Pore pressure estimation from velocity data：accounting for overpressure mechanisms besides undercompaction. SPE Drilling & Completion, 10(2), (1995), pp.89-95.

DOI: 10.2118/27488-pa

Google Scholar

[8] Harkins K L, Baugher III J W. Geological significance of abnormal formation pressures. Journal of Petroleum Technology, 21(08), (1969), pp.961-966.

DOI: 10.2118/2228-pa

Google Scholar