This is an HTML version of an attachment to the Freedom of Information request 'Horse Hill request for information'.

Horse Hill Developments Ltd
Horse Hill-1 (LR/24-4)
Re-Completion Application - Supplemental Information

Introduction
Per our submitted WONS re-completion and well test applications, Horse Hill Developments Ltd
(HHDL) is seeking OGA’s consent to re-complete the Horse Hill-1 (HH-1) well for further extended
well testing. This document provides supplemental information, namely:

-  site plan, aerial site photograph, schematic of current well suspension, well deviation
diagram,  new  wellhead  drawing,  Portland  test  string,  Kimmeridge  Limestones  (“KL”)
test string.

High-resolution  pressure  and  temperature  gauges  will  be  installed  in  each  well  completion/test
zone for all planned test intervals. Downhole pressures and temperatures will also be continuously
monitored via digital surface read-out (SRO) during the testing. SRO will be digitally transmitted to
recording devices in HHDL’s and the well test service company’s offices.

In the base case testing programme of three tests, Portland, KL4 and KL3, the testing will make use
of  the  original  Portland  and  KL  perforations.  As  a  contingency,  dependent  on  the  outcome  and
duration of the main Portland and KL3 and KL4 testing, HHDL may perforate up to two new deeper
KL reservoir units within the KL1 and KL2.

Testing of the KL1 and KL2 units would involve the following new perforations:

Horse Hill-1





MD (ft)
TVD (ft)
TVD SS (ft)
Kimmeridge Limestone 2
Top




base



Kimmeridge Limestone 1
Top




base




The base case is planned to include the following test sequence:

1.  Portland Test
2.  Kimmeridge Limestone 4
3.  Kimmeridge Limestone 3
4.  Contingent commingled flow of KL3 and KL4 if time permits
5.  Contingent tests of KL1 and/or KL2 if time/results permit



HH-1 April 2018 Re-Completion Operations Sequence
Preparatory Work:
1. 

2. 

3. 

4. 

Re-completion operations:

1. 

2. 

3. 

4. 

5. 

6. 

7. 

8. 

9. 

10. 

11. 

12. 

13. 

14. 
























Site Plan












HH-1 Directional
Summary

Portland sandstone:
near vertical
KL4: 33°
KL3: 44°
  
New HH-1 Wellhead




Test String – Portland Test











Test String – Kimmeridge Limestone Tests