kuliah 10 ku sumur ah

Kuliah 10Kuliah-10

K j UlKerja Ulang

D I A d H li MMDosen : Ir. Andry Halim, MMUniversitas Trisakti - Jakarta

2012

Objective/Sasaran Konsep Dasar Komplesi Konsep Dasar Komplesi Konsep Kerja Ulangp j g

Daftar Pustaka

Allen S.O. and Robert A.P. Production Operation, Vol. I Oil and Gas Consultant International Inc.

Peter E. Clark,Well Completions : Stimulation and Work Over. Pertamina Hulu, Teknik Produksi, Jakarta, 2003 H.K. Van Poolen,Well Completion and Stimulations Program. Peter E. Clark,Well Completions : Stimulation and Work Over., p Jonathan Billary,Well Completions Design, PetroleumElsevier,

2009 Semua buku perihal Komplesi dan uji Sumur Semua Jurnal tentang Komplesi dan uji Sumur

Konsep Dasar Komplesi

Well Completion atau penyelesaian sumur adalah Pekerjaan setelah pemboran, logging dan

pemasangan casing dan flanged sudah dilakukan. Komplesi dapat dilakukan dengan rig yang samaKomplesi dapat dilakukan dengan rig yang sama

atau diganti dengan snubbing unit atau unit lain yang lebih murah.

Konsep Dasar KomplesiKonsep Dasar Komplesi

Kerja Ulang SumurKerja Ulang Sumur

Kerja Ulang Sumurj g

Kerja Ulang Sumur

Kerja Ulang Sumurj g

Kerja Ulang Sumurj gThe image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.

Materi terkaitMateri terkait komplesi sumurp

PERFORATING

Indonesia Business Unit

OPTIMIZING FLUID FLOW

Casing

Cement

Damaged Zone(Permeability kd)

Undisturbed Formation(Permeability ku)

Goal : to establish effective (Permeability kd)

Crushed Zone(Permeability kc)

communication between the wellbore and the reservoir

Factors that influence fluid flow through the perforations :Factors that influence fluid flow through the perforations :- Perforating Geometry- Damaged zones around the wellbore- Crushed zones around the perforation

Diff ti l th t i t h f ti


- Differential pressure that exist when perforating

PERFORATING GEOMETRY

Perforating geometry involves : Gun Phasing Shot density Perforation diameter Penetration depth

Perforation Diameter

PenetrationGun Phasing0.1 ent. hole PenetrationGun Phasing2.5 penetration

Cement

7 Casing


7 Casing

Bore hole0.3 ent. hole6.0 penetration

FORMATION FRACTURING

OBJECTIVES

The objective of hydraulic fracturing for well stimulation is to increase well productivity by creating a highly conductive path (compare to reservoir permeability) some distance away from wellbore into the p y) yformation.

Fracture InitiationA hydraulic fracture treatment is accomplished by pumping a suitable fluid into the formation at a rate faster than the fluid can leak off into the rock. Fluid pressure is built up sufficient to overcome the earth compressive stress holding the rock material together. The rock thencompressive stress holding the rock material together. The rock then parts or fractures along a plane perpendicular to the minimum compressive stress in the formation matrix.


Fracture ExtensionAs injection of frac fluid continues, the fracture tends to grow in width

fl id i th f t t d th f t f kas fluid pressure in the fracture, exerted on the fracture face, works against the elasticity of the rock material. After sufficient frac fluid pad has been injected to open the fracture wide enough to accept proppant, sand is added to the frac fluid and is carried into the fracture p pp ,to hold it open after the job.

The growth upward or downward may be stopped by a barrier formation; downward growth may also be stopped by fallout of sand to ; g y pp ythe bottom of the fracture. The growth outward away from the wellbore will be stopped when the rate of frac fluid leakoff through the face of the fracture into the formation equals the rate of fluid injection into the fracture at the wellborefracture at the wellbore.


Mechanics of Fracturing vRegional Rock Stresses

h2v = Total vertical stress, psih1

Total vertical stress, psi= 0.007 D= average rock density, lb/ft= depth, ft

D

= 0.007 D Pr= formation pore pressure, psiPr

v h1 = Maximum principal horizontal matrix stressh2 = Maximum principal horizontal matrix stress

Horizontal Matrix stress depend on rock properties and pore pressure.


ZONE ISOLATION SQUEEZE CEMENTINGPACKERS


Squeeze Cementing - DefinitionSqueeze Cementing Definition

Injection of Cement Slurryinto the voids behind theinto the voids behind thecasing

Dehydration of cementyrequires: fluid fluid-loss, porous(permeable) matrix,differential pressure, time.

Injection below or abovefracture pressure


PACKERS

Objectives

All k ill tt i f th f ll i bj ti h thAll packers will attain one or more of the following objectives when they are functioning properly :

1. Isolate well fluids and pressure.p

2. Keep gas mixed with liquids, by using gas energy for natural flow.

3 Separate producing zones preventing fluid and pressure contamination3. Separate producing zones, preventing fluid and pressure contamination.

4. Aid in forming the annular volume (casing/tubing/packer) required for gas lift or subsurface hydraulic pumping systems.

5. Limit well control to the tubing at the surface, for safety purposes.

6 Hold well servicing fluids (kill fluids packer fluids) in casing annulus


6. Hold well servicing fluids (kill fluids, packer fluids) in casing annulus.

Questions ?

PR-101. Sebutkan faktor-faktoryang berpengaruh terhadap

ilih k l ipemilihan komplesi2. Apa yang dimaksud dengan well service dan work over3. Apa yang dimaksud dengan swabbing dan apa tujuan 3. pa ya g d a sud de ga swabb g da apa tujua

dilakukan swabbing serta perlatan yang digunakan utk operassi swabbing

4 Sebutkan metoda untuk melakukan WO (kerja ulang)4. Sebutkan metoda untuk melakukan WO (kerja ulang)5. Sebutkan peralatan untuk mendeteksi kebocoran

penyemenan ulang dan uraikan.6. Sebutkan metoda untuk isolasi lapisan dan mengapa hal tsb

perlu dilakukan

kuliah 10 ku sumur ah

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