King TECHNOLOGY Today, HPHT wells drilled and completed efficiently

King
Fahad University of Petroleum and Minerals

 

 

College
of Petroleum and Geosciences

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Petroleum
Engineering Department

 

 

 

 

 

 

 

171

 

COMPLETION
CHALLENGES UNDER HPHT CONDITIONS

 

Prepared
for

Dr.
RAHUL N. GAJBHIYE

PETE302

 

 

Student
name: Mohammed AL-Nemer

Student
ID:  201445720

 

 

 

Submission
date:  26   /  
12     /2017

Table of Contents   
INTRODUCTION.. 2
History. 2
Overview.. 3
OBJECTIVE. 3
CHALLENGES ASSOCIATED WITH HPHT TECHNOLOGY. 4
Materials Technology. 4
Packers. 4
Liner Hangers. 4
Polished Bore Receptacle (PBR) 5
Electronics. 5
Perforating Technology. 6
CONCLUSION.. 6
REFERENCES. 7
 

INTRODUCTION

 

History

 

Phillips Petroleum Company was pioneer
in HPHT well test. They conducted the first test in 1965 on Josephine well No.
1, Mississippi, USA. The well was at depth of between 19700 – 22250 ft and
exhibited pressures and temperatures of between 17.5 – 22 ksi and 365 – 385 °F
the produced fluids contained 45 – 65 % methane, 27 – 46 % H2S and 3
– 9 % CO2. Shell Oil Company was the first to complete a HPHT well
in 1969, but the well had to be neglected because of completion equipment
fatigues in the wellhead, seals, tubulars, packers and connectors.

 

 

Overview

 

HPHT is an abbreviation for high
pressure high temperature conditions. Wells which present pressures exceeding
15 ksi or exhibit temperatures above 350 °F are considered to be HPHT wells. If
operations are to be effective, wells present particular difficulties that must
be considered. These difficulties comprise all parts of well construction and
production, and they need manpower and service companies to take actions. Those
actions rely upon the levels of pressures and temperatures experienced. After
the expected pressures and temperatures are resolved, rules and operational
softwares can be detailed to drill, evaluate, complete and securely deliver
hydrocarbons.

 

 

OBJECTIVE

 

The objective of this paper is to discuss HPHT completion
challenges, and to discuss difficulties associated with introducing HPHT
techniques and equipment to the well.

CHALLENGES
ASSOCIATED WITH HPHT TECHNOLOGY

 

Today, HPHT wells drilled and completed
efficiently in most significant petroleum producing states in the world. The
difficulties related to the HPHT completion have a tendency to exceed materials
abilities. Nonetheless, there are different difficulties related with borehole
equipment and electronic devices which should be considered. (Douglas et al,
2014)

 

 

Materials
Technology

 

The knowledge of a component’s
properties within the well temperature range is a crucial part to design a
material. This applies to nonmetallic and metallic materials. In addition, there
are other materials than metallic and nonmetallic that are used under HPHT
conditions like ceramic components, composites, and lubricants. Some of them
are one time use and other are lifelong. (Douglas et al, 2014)

 

 

Packers

 

Plugs and packers advanced for severe
conditions as high as 500 °F and 25 ksi.

Over the last 30 years, HPHT packer evolution
methodology promoted, the main challenge in the evolution track today is the availability
of components and the data for metallic and nonmetallic properties, which will
sustain the ultra high pressure and temperatures, and to resist corrosion. (Douglas
et al, 2014)

 

Liner Hangers

 

Liner hangers with pack off capability (expandable
seal packer) have been improved to adapt HPHT applications, usually these tools
are needed to complete their part in sealing for gas-tight demands. Nonetheless,
an industry specifications fitted for the liner hangers role until now are not
exist. (Douglas et al, 2014)

 

Polished Bore Receptacle (PBR)

 

To isolate the reservoir from the production casing annulus, PBR
system is utilized. The PBR is run as a complementary part of the production liner,
directly below the liner hanger with the seal mandrel and stack run with the
completion string. A PBR style completion was selected over a packer style

completion because it provides:

 

1)  Simpler workovers.

2) Lower tubing stresses.

3) Simpler completion design.

4) Successful experience in US HPHT wells and recently on the
Strathspey field in the North Sea.

 

To enhance completion efficiency and decrease the probability of
a workover, the seal stack will be installed in a static position during all
production operations. adequate weight will be set down together with annulus stress
to prevent seal movement during hot producing and cold shut in periods. The
stack is positioned in the PBR to sustain upward movement during well kill operations
or stimulation treatment. Seal stack testing at simulated bottom hole

conditions are ongoing to determine the best available configuration.
(G.S.Elliott et al, 1995)

 

 

Electronics

 

Typical field electronics parts are usually
estimated only to 257 °F, far below the estimating needed for the high temperature
borehole electronics actions such as measurement while drilling and rotary
steerable systems (RSS) that they are used in. however, the oldest and largest user
of electronics for high temperature implementations is the downhole oil and gas
industry. These parts and components can have multiple failure patterns, due to
electric chemical reactions, which are quicken by increased temperatures. As
reservoir temperatures approach the plastic material’s limit, distinguishing
between a packaging related failure and a silicon related failure is difficult.
Testing plays an important role in establishing failure patterns, and as reservoir
temperature expectations rise, engineers will also have to develop testing
programs. (Douglas et al, 2014)

 

 

Perforating
Technology

 

Strong explosion perforating charges have improved over time and
are used efficiently in most HPHT perforating applications. For temperatures
between 350 °F and 500 °F, HNS charges are utilized and their life is
approximated at between one and five hours. (Douglas et al, 2014)

To make the largest probability of flow. Over balance
perforation is utilized when certain restrictions are encountered using tubing
conveyed perforating. Deep penetration gun appropriate for High temperature
application is required for creating connection between heavy walled casing and
HPHT reservoir. (Al-Salali et al, 2013)

 

 

CONCLUSION

 

To overcome all HPHT challenges, we need to consider all difficulties
and how to manage equipment to sustain such conditions. HPHT wells can be
designed safely using reliable technologies and the well should be continuously
tested and evaluated. When completing a well, we should always consider the
worst scenarios.

 

REFERENCES

 

Al-Salali.Y, Bader.H, Duggirala.V, Manimaran.A, Packirisamy.S,
Al- Ibrahim.A, Rajkhowa.A, (2013). Challenges
in Testing and Completion          of
Highly Sour HPHT Reservoir in The State of Kuwait. KOC. Retrieved
          from:

https://www.onepetro.org/download/conference-paper/SPE-167647-          MS?id=conference-paper%2FSPE-167647-MS

Lehr.D, Coolins.S, (2014). The HPHT Completion Landscape –
Yesterday, Today, and Tomorrow. Baker
Hughes. Retrieved from:

https://www.onepetro.org/download/conference-paper/SPE-170919-          MS?id=conference-paper%2FSPE-170919-MS

 

Elliott.G, Brockman.R, (1995). HPHT Drilling and Completion
Design for the         Erskine Field. Texaco
North Sea UK Co, SPE, Texaco Limited. Retrieved           from:

https://www.onepetro.org/download/conference-paper/SPE-30364- MS?id=conference-paper%2FSPE-30364-MS