DEVELOPMENT OF BREAKTHROUGH TIME CORRELATIONS FOR CONING IN BOTTOM WATER SUPPORTED RESERVOIRS

  • Type: Project
  • Department: Petroleum Engineering
  • Project ID: PEE0020
  • Access Fee: ₦5,000 ($14)
  • Chapters: 5 Chapters
  • Pages: 50 Pages
  • Format: Microsoft Word
  • Views: 934
  • Report This work

For more Info, call us on
+234 8130 686 500
or
+234 8093 423 853

ABSTRACT

This research work mainly investigates the development and the behavior of cones (both water and gas cones) in oil reservoirs supported by strong aquifer, and from which analytical correlations are developed for quick engineering estimates of the time for water/gas cones to break into the perforations of the producing wells. The studies treated the cone development and breakthrough times in both horizontal and vertical well producing reservoirs and made analysis on them. The Ozkan and Raghavan (1990) method was employed as the base approach in the modeling of the cones; as well as their breakthrough times and then compare with that of Chaperon’s approach(1986) with both the horizontal and vertical well applied. The developed models were then run on field data, the results were graphically represented in both the horizontal and vertical well cases. Analytical correlations were then developed from the results obtained for breakthrough time estimation and compared with literature on example case. This work actually employs the dimensionless (or the normalized approach) system to curtail the units complexities and represent the results in a more generalized form. These analytical correlations can be leveraged on to plan better future recompletion strategy as they provide an engineering estimate of when water breaks into the production wells.



CHAPTER ONE

1.1INTRODUCTION

Coning is the mechanism describing the movement of water/gas into the perforations of producing wells. For water coning the movement is upwards for the case of bottom water, side wards for edge water, but it is downwards for gas coning. The production of water from oil wells is a common occurrence which increases the cost of producing operations and may reduce the efficiency of the depletion mechanism and the recovery of reserves. The objective of this research work is to model the behaviour of this coning(mainly water coning, from bottom water) and then use it to evaluate the time it would take a cone to break into the producing well in reservoir of well-defined boundary conditions.

The coning of water into production wells is caused by pressure gradients established around the wellbore by the production of fluids from the well. These pressure gradients can raise the water-oil contact near the well where the gradients are dominant. The gravity forces that arise from fluid density differences counterbalance the flowing pressure gradients and tend to keep the water out of the oil zone. Hence, at any given time, there is a balance between the gravitational and the viscous forces at any point on and away from the completion interval. The water cone formed will break eventually into the well to produce water along with the oil when the viscous forces exceed that of the gravitational forces. This basic visualization of coning can be expanded further by introduction of the concept of stable cone, unstable cone and critical production rate.

STABLE CONE:

If a well is produced at a constant rate and the pressure gradient in the drainage system have constant, a steady state condition is reached, if at this condition, the dynamic forces (viscous forces) at the well are less than the gravity forces then the water or gas cone that has formed will not extend to the well .Moreover, the cone will not advance nor recede, thus establishing what is known as stable cone.

UNSTABLE CONE:

Conversely, if the pressure in the system is in an unsteady-state condition, then the cone that will be formed is unstable and it will continue to advance until the steady-state condition takes over. If the flowing pressure drop is sufficient to overcome the gravity forces, the unstable cone will mushroom and ultimately break into the well. In actual sense therefore, stable cones may only be 'pseudo-stable' because the drainage system and the pressure distribution generally change. For a example, during reservoir depletion, the water- oil contact may advance toward the completion interval, thereby increasing coning tendencies. Another one is reduction in productivity due to well damage requires a corresponding increase in the flowing pressure drop to maintain a given production rate. This increase in pressure drop may force an otherwise stable cone into the well.

DEVELOPMENT OF BREAKTHROUGH TIME CORRELATIONS FOR CONING IN BOTTOM WATER SUPPORTED RESERVOIRS
For more Info, call us on
+234 8130 686 500
or
+234 8093 423 853

Share This
  • Type: Project
  • Department: Petroleum Engineering
  • Project ID: PEE0020
  • Access Fee: ₦5,000 ($14)
  • Chapters: 5 Chapters
  • Pages: 50 Pages
  • Format: Microsoft Word
  • Views: 934

500
Leave a comment...

    Related Works

    Abstract Drones are autonomous vehicles that have been beneficial to humans since their creation. Drones are considered to carry out activities efficiently. In the last ten years, drones are becoming a common sight. Filming for TV and Movies, surveillance, delivery, and hobby flight are some tasks which make use of drones. The potential of drones... Continue Reading
    CHAPTER1 1.0 INTRODUCTION 1.1 BACKGRAND OF STUDY Interpretation of data from Well test analysis have been based on the implicit assumption that the reservoir is a homogeneous single layer. However, the real petroleum reservoir, is a composition of layers with unique interlayer... Continue Reading
    CHAPTER1 1.0 INTRODUCTION 1.1 BACKGRAND OF STUDY      Interpretation of data from Well test analysis have been based on the implicit assumption that the reservoir is a homogeneous single layer. However, the  rea l petroleum reservoir, is a composition of layers with unique interlayer characteristics. The individual layers are usually... Continue Reading
    INTRODUCTION How can a college or university best support the faculty in the process of rethinking courses and curricula to unleash the truly revolutionary potential for technology to enhance learning? This article presents four key strategies that have contributed to a growing campus culture at embrace the potential of technological tools to... Continue Reading
    Abstract This is a case control study aimed to measure levels of, Prothombin time (PT), activated partial Thromboplastin time (APTT), platelet count in patients with homozygous sickle cell disease (HbSS), sickle cell trait (HbAS) and normal controls (HbAA). The study period from August to October 2019, in Khartoum State in the Sickle Cell Clinic... Continue Reading
    ABSTRACT Using basic galvanic cell principles, the ability of tissues to generate electrical current through electrolysis was characterized. Studying Zn/Cu electrolysis in animal organs revealed a fundamental and measurable tissue-specific property – the galvanic apparent internal impedance (GAII), that is most likely related to the salt bridge... Continue Reading
    ABSTRACT Using basic galvanic cell principles, the ability of tissues to generate electrical current through electrolysis was characterized. Studying Zn/Cu electrolysis in animal organs revealed a fundamental and measurable tissue-specific property – the galvanic apparent internal impedance (GAII), that is most likely related to the salt bridge... Continue Reading
    Crude oil viscosity is an important parameter which is considered in both porous media and in pipeline channels. Estimating oil viscosity at various operating conditions of pressure and temperature is of great value to petroleum engineers. In petroleum and reservoir engineering, we are often faced with the analysis of processes which involve... Continue Reading
    Crude oil viscosity is an important parameter which is considered in both porous media and in pipeline channels. Estimating oil viscosity at various operating conditions of pressure and temperature is of great value to petroleum engineers. In petroleum and reservoir engineering, we are often faced with the analysis of processes which involve... Continue Reading
    ABSTRACT Capacity development is a fundamental part of the mandates of many international organizations. Much of their work aims to strengthen national capacities through training, technical advice, exchange of experiences, research, and policy advice. Yet there is considerable dissatisfaction within the international community regarding the... Continue Reading
    Call Us Get this work