Innovative Water Control Technique for Horizontal Wells in Isotropic Reservoirs - Successful Case History From Belayim Field

2015 ◽  
Author(s):  
Ahmed. F. El Gogary ◽  
Hossam. H. El-Masry ◽  
Mostafa. M. Kortam ◽  
Hany. R. El-Rayek
Keyword(s):  
Case History ◽  
Horizontal Wells ◽  
Control Technique ◽  
Water Control ◽  
Successful Case

A Successful Case History of Carbonate Acidizing for High H2S Gas Well in China

2016 ◽  
Author(s):  
Minh Vo ◽  
Kevin Scott ◽  
Chaohong Xiao ◽  
Qiang Wang ◽  
Zhengxing Dai ◽  
...  
Keyword(s):  
Case History ◽  
Gas Well ◽  
Successful Case ◽  
History Of ◽  
Carbonate Acidizing

A Novel Double-Group Crosslinked Hydrogel with High Thixotropy for Water Control in Horizontal Wells

SPE Journal ◽  
2020 ◽  
pp. 1-15
Author(s):  
Gang Li ◽  
Lifeng Chen ◽  
Meilong Fu ◽  
Lei Wang ◽  
Yadong Chen ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Gelation Time ◽  
Horizontal Wells ◽  
Uniform Grid ◽  
Drilling Fluids ◽  
Water Production ◽  
Water Control ◽  
Recovery Coefficient ◽  
Metastable Structure ◽  
Control Water

Summary Horizontal wells that are completed with slotted liners often suffer from a severe water-production problem, which is detrimental to oil recovery. It is because the annulus between the slotted liners and wellbore cannot be fully filled with common hydrogels with poor thixotropy, which determines the ultimate hydrogel filling shape in the annulus. This paper presents a novel hydrogel with high thixotropy to effectively control water production in horizontal wells. This study is aimed at evaluating the thixotropic performance, gelation time, plugging performance, and degradation performance. The thixotropic performance of the new hydrogel was also investigated by measuring its rheological properties and examining its microstructures. It was found that the new hydrogel thickened rapidly after shearing. Its thixotropic recovery coefficient was 1.747, which was much higher than those of traditional hydrogels. The gelation time can be controlled in the range of 2 to 8 hours by properly adjusting the concentrations of the framework material, crosslinker, and initiator. The hydrogel could be customized for mature oil reservoirs, at which it was stable for more than 90 days. A series of laboratory physical modeling tests showed that the breakthrough pressure gradient and the plugging ratio of the hydrogel in sandpacks were higher than 9.5 MPa/m and 99%, respectively. At the same time, it was found that the hydrogel has good degradation properties; the viscosity of the hydrogel breaking solution was 4.22 mPa·s. Freeze-etching scanning-electron-microscopy examinations indicated that the hydrogel had a uniform grid structure, which can be broken easily by shear and restored quickly. This led to the remarkable thixotropic performance. The formation of a metastable structure caused by the electrostatic interaction and coordination effect was considered to be the primary reason for the high thixotropy. The successful development of the new thixotropic hydrogel not only helps to control water production from the horizontal wells, but also furthers the thixotropic theory of hydrogel. This study also provides technical guidelines for further increasing the thixotropies of drilling fluids, fracturing fluids, and other enhanced-oil-recovery polymers that are commonly used in the petroleum industry.

Challenges and Opportunities of Modelling Long Horizontal Wells. A Case History

2015 ◽  
Author(s):  
F. Arata ◽  
P. Cardola ◽  
C. Costanzo ◽  
F. Grilli ◽  
A. Valdisturlo ◽  
...  
Keyword(s):  
Case History ◽  
Horizontal Wells ◽  
Challenges And Opportunities

A Case History: Completion and Stimulation of Horizontal Wells with Multiple Transverse Hydraulic Fractures in the Lost Hills Diatomite

1998 ◽  
Author(s):  
M.A. Emanuele ◽  
W.A. Minner ◽  
L. Weijers ◽  
E.J. Broussard ◽  
D.M. Blevens ◽  
...  
Keyword(s):  
Case History ◽  
Horizontal Wells ◽  
Hydraulic Fractures ◽  
Stimulation Of

Customized Drilling & Completion Fluids Designed for Horizontal Wells to Address the Drilling and Production Challenges - Case History

2016 ◽  
Author(s):  
Ahmed Soliman ◽  
Ahmed Samir ◽  
Shahad Sheer ◽  
Ali AL-Khaldi ◽  
Ali Boukhamsin
Keyword(s):  
Case History ◽  
Horizontal Wells ◽  
Completion Fluids
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