Assessment of Factors Influencing Inflow Performance Relationships of Horizontal Oil Wells: A New Approach

2016 ◽  
Author(s):  
O. I. O. Ogali ◽  
S. S. Ikiensikimama ◽  
J. A. Ajienka
Keyword(s):  
Oil Wells ◽  
New Approach ◽  
Factors Influencing ◽  
Inflow Performance

scholarly journals Lab-Supported Hypothesis and Mathematical Modeling of Crack Development in the Fluid-Soaking Process of Multi-Fractured Horizontal Wells in Shale Gas Reservoirs

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1035
Author(s):  
Zhiyong Huang ◽  
Boyun Guo ◽  
Rashid Shaibu
Keyword(s):  
Crack Propagation ◽  
Shale Gas ◽  
Oil Wells ◽  
Pressure Data ◽  
Fracturing Fluid ◽  
Well Productivity ◽  
Soaking Time ◽  
Core Samples ◽  
Inflow Performance ◽  
Optimum Water

The objective of this study is to develop a technique to identify the optimum water-soaking time for maximizing productivity of shale gas and oil wells. Based on the lab observation of cracks formed in shale core samples under simulated water-soaking conditions, shale cracking was found to dominate the water-soaking process in multi-fractured gas/oil wells. An analytical model was derived from the principle of capillary-viscous force balance to describe the dynamic process of crack propagation in shale gas formations during water-soaking. Result of model analysis shows that the formation of cracks contributes to improving well inflow performance, while the cracks also draw fracturing fluid from the hydraulic fractures and reduce fracture width, and consequently lower well inflow performance. The tradeoff between the crack development and fracture closure allows for an optimum water-soaking time, which will maximize well productivity. Reducing viscosity of fracturing fluid will speed up the optimum water-soaking time, while lowering the water-shale interfacial tension will delay the optimum water-soaking time. It is recommended that real-time shut-in pressure data are measured and shale core samples are tested to predict the density of cracks under fluid-soaking conditions before using the crack propagation model. This work provides a shut-in pressure data-driven method for water-soaking time optimization in shale gas wells for maximizing well productivity and gas recovery factor.

Analytical Inflow Performance Relationships

1999 ◽  
Vol 121 (1) ◽  
pp. 24-30
Author(s):  
M. L. Wiggins
Keyword(s):  
Multiphase Flow ◽  
Physical Nature ◽  
Oil Wells ◽  
Well Performance ◽  
Flow Conditions ◽  
Flow Equations ◽  
Petroleum Engineer ◽  
Single Well ◽  
Production Behavior ◽  
Inflow Performance

The performance of oil wells producing during boundary-dominated flow was investigated to develop a better understanding of multiphase flow and its effects on single well performance. This understanding can assist the petroleum engineer in predicting the pressure-production behavior of oil wells producing under boundary-dominated flow conditions. An analytical inflow performance relationship (IPR) was developed from the multiphase flow equations. This relationship is based on the physical nature of the multiphase flow system and contributes to a better understanding of the pressure-production behavior of an individual well. The analytical IPR was verified using simulator information and provides a method for the petroleum engineer to develop individual IPRs for each reservoir.

scholarly journals Establishing IPR in Gas-Condensate Reservoir: An Alternative Approach

2019 ◽  
Vol 9 (6) ◽  
pp. 5011-5015 ◽  
Author(s):  
M. H. Chachar ◽  
S. A. Jokhio ◽  
A. H. Tunio ◽  
H. A. Qureshi
Keyword(s):  
Gas Phase ◽  
Oil Industry ◽  
Pressure Function ◽  
Flow Rates ◽  
New Approach ◽  
Alternative Approach ◽  
Condensate Reservoir ◽  
The Difference ◽  
Inflow Performance ◽  
Standing Problem

Inflow performance relationship (IPR) accuracy in the condensate reservoir is a long-standing problem in the oil industry. This paper presents a new approach to project the gas phase IPR in condensate reservoirs. IPR is estimated by Rawlins and Schellhardt equation whereas the gas pseudo-pressure function is solved by two methods and the results are compared. Both two pseudo-pressure equations are used to estimate IPR. Additionally, an average of both IPR’s is estimated and compared. At the reservoir pressure, the difference between both flow rates is negligible i.e. at 6750 psi, the flow rate difference is 0.55 MMSCF/D. As pressure declines the difference is increasing at one stage, it is observed approximately 15 MMSCF/D.

scholarly journals Factors influencing national policy in operational-search activities

2020 ◽  
Vol 2 (2) ◽  
pp. 287-294
Author(s):  
Oleksandr Mishchanynets
Keyword(s):  
Law Enforcement ◽  
State Policy ◽  
National Policy ◽  
Legal Regulation ◽  
The State ◽  
Search Activity ◽  
New Approach ◽  
Factors Influencing ◽  
Priority Direction ◽  
Further Development

The factors influencing the state policy in the field of operational-search activity have been studied. The author has noted that the reforms taking place in the law enforcement area have laid a new approach to combating crime, as the traditional perception of crime and combating it is changing. Combating crime requires, first of all, modern, perfect regulatory support. And first of all it concerns the sphere of operative-search activity as a priority direction of counteraction to crime. In this regard, the priority area of research is public policy, which takes place in the field of op-erational and investigative activities. Therefore, the purpose of the article is to identify the factors that influence the state policy in the field of operational and investigative activities and highlight the directions of formation of this policy. It is emphasized that this list is not exhaustive and can be supplemented, which, in turn, further determines the need for further in-depth scientific research in this area. Factors influencing the state policy in the field of operational and investigative activities should be taken into account when forming a single Concept of legal policy, which would reflect a holistic system of leading official views on its essence and content, would determine the priorities for further development. The development of the Concept of the state policy in the field of operative-investigative activity will make it possible to ensure the adoption of a system of laws that provide a complex, logically consistent legal regulation of certain phenomena of public life.

New approach to determine biological and environmental factors influencing mass of a single pea (Pisum sativum L.) seed in Silesia region in Poland using a CART model

2016 ◽  
Vol 74 ◽  
pp. 29-37 ◽  
Author(s):  
Mariusz Dacko ◽  
Tadeusz Zając ◽  
Agnieszka Synowiec ◽  
Andrzej Oleksy ◽  
Agnieszka Klimek-Kopyra ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Pisum Sativum ◽  
New Approach ◽  
Factors Influencing ◽  
Pisum Sativum L ◽  
Cart Model
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