Laboratory Research on Reservoir Adaption of Water Fracturing

2013 ◽  
Vol 295-298 ◽  
pp. 2816-2819
Author(s):  
Shi Bin Li ◽  
Zhi Chao Kang ◽  
Li Gang Zhang
Keyword(s):  
Fracture Surface ◽  
Screening Method ◽  
Complex Stress ◽  
Complex Stress State ◽  
Test Method ◽  
Laboratory Research ◽  
Low Permeability ◽  
Fracture Surface Roughness ◽  
Fracture Deformation ◽  
Low Permeability Reservoirs

Water fracturing is vast applied in low permeability oil-gas filed, and gains extremely economic benefit. But not all low permeability reservoirs are suitable for water fracturing. This paper analyzed the fracture deformation characteristics and closed form in complex stress state, the fracture surface roughness and shear-slip caused the fracture surface couldn’t be completely meshed, there was residual space. Based on the characteristics, the self-support fracture combination and conductivity test method were established. The non-dimensional conductivity as the evaluation index, the water fracturing reservoir screening method was established.

FEM Analysis and Experimental Study for Bond Strength of High-Strength Coating by Wedged Load Test Method

2010 ◽  
Vol 152-153 ◽  
pp. 1058-1061
Author(s):  
Zhou Wei ◽  
Xiao Xia Zhang
Keyword(s):  
Bond Strength ◽  
Adhesion Strength ◽  
Fem Analysis ◽  
High Strength ◽  
Pressure Head ◽  
Optical Microscope ◽  
Complex Stress ◽  
Complex Stress State ◽  
Load Test ◽  
Test Method

A wedged load test method is used to evaluate the adhesion strength of high-strength coatings, which have been processed with various sintering parameters. In this test, for stress concentration at cut tip, cracks are always induced and expanded rapidly cross the interface between coating and substrate. Macro-fracture and SEM image of coating interface of high-strength coating are characterized using optical microscope and scanning electron microscopy (SEM), respectively. In order to evaluate the bonding properties between coating and substrate effectively, corresponding finite element (FE) analysis has been conducted to evaluate the adhesion strength of high-strength coating. And stress distributions cross the interface of high-strength coating are obtained. The stress analysis can help to evaluate the bond strength of high-strength coating. Because of small specimen and contact relationship between wedged pressure head and wedged cuts, complex stress state is affected by many factors resulting from interface, and also by the thickness of coating.

scholarly journals A new screening method of low permeability reservoirs suitable for CO 2 flooding

2015 ◽  
Vol 42 (3) ◽  
pp. 390-396 ◽  
Author(s):  
Gaofeng WANG ◽  
Xiongjie ZHENG ◽  
Yu ZHANG ◽  
Wenfeng LÜ ◽  
Fang WANG ◽  
...  
Keyword(s):  
Screening Method ◽  
Low Permeability ◽  
Low Permeability Reservoirs

Studies on Applying Acid Compositions to Treat the Western Siberian Field Bottomhole Formation Zone

2018 ◽  
Vol 785 ◽  
pp. 77-87
Author(s):  
Ivan Nesterov ◽  
Marsel Kadyrov ◽  
Alexander Markov ◽  
Denis Drugov ◽  
Vladimir Zapevalov
Keyword(s):  
Mineralogical Composition ◽  
Laboratory Research ◽  
Low Permeability ◽  
Acid Effect ◽  
Formation Zone ◽  
Porosity And Permeability ◽  
Optimum Reaction ◽  
Formation Conditions ◽  
Effective Development ◽  
Low Permeability Reservoirs

Effective development of oil deposits includes the measures to restore and improve the porosity and permeability properties (PPP) of reservoir units, which inevitably deteriorate during the operation of the field. For this purpose, various technologies of bottomhole formation zone acid treatment (BFZAT) are used. These approaches are sufficiently developed and usually do not require additional laboratory adaptation. Specific requirements for technologies that include acid effect on the formation are required for interventions on low-permeability reservoirs (LPR), where the influence of the mineralogical composition of rocks and their porosity and permeability properties on the efficiency of BFZAT is the most significant. Therefore, during interventions development for LPR using acid methods, it is necessary to correctly assess the capabilities of a particular method (composition) in relation to specific conditions. This can be achieved by conducting standard laboratory tests (determination of rock carbonation and mass loss in 12% hydrochloric acid) and additional experiments to determine the mass of the secondary sediment, as well as the optimum reaction time at the formation temperature. The research objective is a laboratory research on the selection of acid compositions for bottomhole formation zone treatment for a number of low-permeability reservoirs in Western Siberia. Standard and special laboratory studies have allowed suggesting the most optimum acid compositions adapted to “rigid” formation conditions.

ASSESSMENT OF OIL WELL PRODUCTIVITY IN LOW-PERMEABILITY RESERVOIRS IN THE FIELDS OF EASTERN SIBERIA

2017 ◽  
pp. 30-36
Author(s):  
R. V. Urvantsev ◽  
S. E. Cheban
Keyword(s):  
Oil Recovery ◽  
Large Scale ◽  
Oil And Gas ◽  
Oil Extraction ◽  
Low Permeability ◽  
Oil Well ◽  
Eastern Siberia ◽  
Development Costs ◽  
Traditional Fields ◽  
Low Permeability Reservoirs

The 21st century witnessed the development of the oil extraction industry in Russia due to the intensifica- tion of its production at the existing traditional fields of Western Siberia, the Volga region and other oil-extracting regions, and due discovering new oil and gas provinces. At that time the path to the development of fields in Eastern Siberia was already paved. The large-scale discoveries of a number of fields made here in the 70s-80s of the 20th century are only being developed now. The process of development itself is rather slow in view of a number of reasons. Create a problem of high cost value of oil extraction in the region. One of the major tasks is obtaining the maximum oil recovery factor while reducing the development costs. The carbonate layer lying within the Katangsky suite is low-permeability, and its inventories are categorised as hard to recover. Now, the object is at a stage of trial development,which foregrounds researches on selecting the effective methods of oil extraction.

Theoretical analysis of pressure-bearing performance on compression packer in low permeability reservoirs

2021 ◽  
Vol 191 ◽  
pp. 104325
Author(s):  
Yanwen Zhang ◽  
Hanxiang Wang ◽  
Jiaqi Che ◽  
Mingchao Du ◽  
Mingjie Dou ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Low Permeability ◽  
Low Permeability Reservoirs
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